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SELECTION PROCESS
WATEROR
STEAMWATER STEAM
CALCULATE CvSEE TABLE 2
CALCULATE CvSEE TABLES 10 AND 11
2-WAY
OR3-WAY
TWOWAY
THREEWAY
TABLE 3:
TWO-WAY WATER
GLOBE VALVES
TABLE 12:
TWO-WAY STEAM
GLOBE VALVES
TABLE 7:
THREE-WAY WATER
GLOBE VALVES
TABLE 4:TWO-WAY WATER
SPECIALTY VALVES
TABLE 13:TWO-WAY STEAM
SPECIALTY VALVES
TABLE 5:
TWO-WAY WATER
BALL VALVES
TABLE 14:
TWO-WAY STEAM
BALL VALVES
TABLE 8:
THREE-WAY WATER
BALL VALVES
TABLE 6:
TWO-WAY WATER
VALVES (WITHINTEGRAL PNEUMATIC
ACTUATORS)
TABLE 15:
TWO-WAY STEAM
VALVES (WITHINTEGRAL PNEUMATIC
ACTUATORS)
TABLE 9:
THREE-WAY WATER
VALVES (WITHINTEGRAL PNEUMATIC
ACTUATORS)
TABLE 20:TWO-WAY WATER
UNITARY VALVES
TABLE 20:TWO-WAY STEAM
UNITARY VALVES
TABLE 21:THREE-WAY WATER
UNITARY VALVES
REFER TO THE FOLOWING
TABLE FOR ACTUATOR
COMPATIBILITY AND
CLOSEOFF INFORMATION:
REFERTOT
ABLEFORVALVESELECT
ION
BODY
Cv
MEDIUM
TABLE 16
TABLE 17
TABLE 18
TABLE 19
TABLE 23
M11538
VALVE SELECTION QUICK REFERENCE GUIDE
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CONTENTS
VALVE SELECTION QUICK REFERNCE GUIDE ......................................................................................................... inside front cover
VALVE PRODUCT OVERVIEW ................................................................................................................................................................ 5
INTRODUCTION .......................................................................................................................................................................................... 10
SUMMARY OF THE VALVE SELECTION PROCESS ...........................................................................................................................10
GENERAL CONSIDERATIONS FOR SELECTING VALUES TO CALCULATE CV ......................................................................... 10
Control Sensitivity .............................................................................................................. 11
Pressure Drop ...................................................................................................................... 11
Closeoff ............................................................................................................................... 11
BALL VALVE APPLICATION NOTES ....................................................................................................................................................... 11
WATER VALVE SELECTION ...................................................................................................................................................................... 13
Calculating CV ..................................................................................................................... 13
STEAM VALVE SELECTION ...................................................................................................................................................................... 22
Calculating CV ..................................................................................................................... 22
ACTUATOR SELECTION ............................................................................................................................................................................ 29
Connectivity ........................................................................................................................ 29
Default Position ................................................................................................................... 29
Actuator Force ..................................................................................................................... 29
UNITARY VALVE SELECTION .................................................................................................................................................................. 37
Calculating CV ..................................................................................................................... 37
Replacing Unitary Valves .................................................................................................... 37
Unitary Valve Actuators ...................................................................................................... 41
APPENDIX ..................................................................................................................................................................................................... 43
Flange Valve Cross Reference (From V5011/13 to V3351/61,V3451/61).......................... 43
Quick-Reference Guides for Flange and VC Valves .................................................... 43, 44
Equations for Manual Calculations ..................................................................................... 44
Glossary .............................................................................................................................. 54
Chart
Table 1. Effective Cvs using pipe reducers with ball valves .............................................. 12
Table 2. Calculating CVusing pressure drop and flow rate ................................................ 14
Table 3. Two-way, water globe valve characteristics .......................................................... 15
Table 4. Two-way, water specialty valve characteristics ..................................................... 17
Table 5. Two-way, water ball valve characteristics ............................................................. 17
Table 6. Two-way, water valve (with integral pneumatic actuator) characteristics............ . 18
Table 7. Three-way, water globe valve characteristics ........................................................ 19
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Table 8. Three-way, reduced port water ball valves characteristics .................................... 20
Table 9. Three-way, water valve (with integral pneumatic actuator)characteristics ........................................................................................................ 15
Table 10. Calculation of Factor A for steam valves ............................................................ 22
Table 11. Steam valve CVfinal calculation ......................................................................... 23
Table 12. Two-way, steam globe valve characteristics ........................................................ 24
Table 13. Two-way, straight-through steam specialty valve characteristics........................ 26
Table 14. Two-way, steam ball valve characteristics ........................................................... 26
Table 15. Two-way, steam valve (with integral pneumatic actuator)characteristics ...................................................................................................... 27
Table 16. Two-way globe valve/actuator compatibility and closeoff ratings ...................... 30
Table 17. Three-way globe valve/actuator compatibility and closeoff ratings .................... 32
Table 18. Specialty valve/actuator compatibility and closeoff ratings ................................ 34
Table 19. Ball valve/actuator compatibility and closeoff ratings ........................................ 36
Table 20. Two-way, water unitary valve characteristics ...................................................... 38
Table 21. Three-way, water unitary valve characteristics ................................................... 39
Table 22. Two-way, steam unitary valve characteristics ..................................................... 40
Table 23. Unitary valve/actuator compatibility and closeoff ratings .................................. 41
Table 24. VC Valve actuator selection chart ........................................................................ 42
Table 25. Flange valve cross-reference ............................................................................... 43
Table 26. Data for calculating K using water temperature .............................................. 45
Figures
Figure 1. Heat output, flow, and stem travel valve characteristics ...................................... 11
Figure 2. Three-way ball valve stroke setting requirements and flowwhen normally open ............................................................................................ 12
Figure 3. Flange valve OS number descriptions ................................................................. 43
Figure 4. VC Valve quick selection chart ............................................................................ 44
Figure 5. Globe valve components...................................................................................... 54
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VALVE PRODUCT OVERVIEW
V5011 Two-way globe valves.
For two-position or modulating control of steam or hot water, or chilled water airconditioning applications.Not suitable for combustible gas service.V5011B is stem up to close (RA); all others are stem down (DA).
Flow characteristic:V5011A, B, F, H: Equal percentageV5011G, J: Linear
Valve stem travel:1/2 in. through 3 in.: 3/4 in.4 in. through 6 in.: 1-1/2 in.
Service temperature ranges:Water service: 40F to 250F (4C to 121C)Steam service: 337F maximum
Maximum pressure differential (for normal disc and seat life):Two-postion steam: 70 psi Two-position water: 50 psiModulating steam: 35 psi Modulating water: 25 psi
See p 15, 24, 30, 43.
V5013 Three-way valves.
V5013B and F: mixing valves for two-position or modulating control of hot or chilledwater.V5013C: diverting valve for two-position control of hot or chilled water.
Flow characteristic: Equal percentageValve stem travel:
1/2 in. through 3 in.: 3/4 in.4 in. through 6 in.: 1-1/2 in.
Service temperature ranges:Water service: 40F to 250F [4C to 121C]
Maximum pressure differential (for normal disc and seat life):Two-position service: 50 psi Modulating service: 50 psi
See p 19, 32, 43.
V3350/51, V3360/61, V3450/51, V3460/61 Two and three-way
(mixing) flanged globe valves.
For two-position or modulating control of steam or hot water, or chilled water airconditioning applications.A, B models are stem down to close (DA); C, D are stem up (RA).
Flow characteristic: Linear or Equal percentageValve stem travel:
2-1/2 in. through 3 in.: 3/4 in.4 in. through 6 in.: 1-1/2 in.
Service temperature range: 20F to 250FMaximum pressure differential:
25 psi for bronze trim 50 psi for stainless steel trimSee p 15, 19, 24, 30, 32, 43.
VB30A Two-way ball valves,
VB30B Three-way ball valves.
For two-position or modulating control of steam (two-way valve only), hot or cold water.Flow characteristic:
VB30A: Equal PercentageVB30B: Linear
Valve stem travel: 90to 360Service temperature range: 35F to 250FMaximum pressure rating:
Water service: 250 psi Steam service: 15 psiSee p 11, 17, 26, 36.
V5011
V5013
V3350
V3360
VB30
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V5047 Double-seated, two-way valves.
For two-position or modulating control of high pressure steam, liquids, air or non-combustible medium where tight shutoff is not required.
Flow characteristic: Equal percentageValve stem travel:
1 in. through 1-1/2 in.: 9/16 in.2 in.: 3/4 in.
Service temperature range: 32F to 353FMaximum pressure rating: 125 psiSee p 17, 26, 34.
V5045 Single-seated, two-way valves.
Valve body used for two-position control of hot water, low pressure steam, or airconditioning coils. Suitable for zoned systems. Teflon packing prevents leakage andincreases valve life.
Flow characteristic: Quick-opening (On/Off)Valve stem travel: 1/4 in.-3/8 in.Service temperature range: 250FMaximum pressure differential:
100 psi for 1/2 in. 12 psi for 2 in.See p 15, 24, 42.
V5051 Two-way cage valves.
For two-position or modulating control of high pressure steam, liquids, air, or non-combustible gases where tight shut-off is not required.
Flow characteristic: Modified linearValve stem travel: 1-1/2 in.Service temperature range: 32F to 353FPressure ratings:
Steam Service: 125 psi maximumLiquids at 300F: 140 psi maximumLiquids at 100F: 150 psi maximum
See p 17, 26, 34.
V51 Butterfly valves.
For modulating zone control of gravity hot water or low pressure steam heating systemswhere tight shut-off is not required.
Service temperature range: 250F maximumMaximum pressure rating: 20 psiSee p 17, 26, 34.
V5086 Thermostatic radiator valves.
For modulating zone control of hot water or steam through free-standing radiators,convectors, or baseboard units.
Flow characteristic: LinearService temperature range: 248F maximum
Maximum pressure rating: 17 psi for quiet water serviceSee p 17, 26, 42.
V5047
V5045
V5051
V51
V5086(straight body)
V5086(angle body)
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V5852/53, V5862/63 Single-seated, two and three-way (mixing) valves.
For control of hot or cold water for vents, fan coil units, small reheaters and recoolersin electronic temperature control systems.
Flow characteristic: Equal percentageValve stem travel: 1/4 in.Service temperature range: 230FMaximum pressure differential: 9 psi for quiet operationSee p 39, 41, 42.
V4043/44, V8043/44 Single-seated, two-way and three-way unitary valves.
For two-position control of steam or hot water, or chilled water air conditioningapplications.
Flow characteristic: Quick-openingService temperature ranges:
Ambient Dependent: 250F absolute maximumMaximum pressure differential:
Two-postion steam: 15 psi Two-position water: 50 psi
See p 39, 41, 42.
VC valves
For two-position or modulating control of steam or hot water, or chilled water airconditioning applications.
Flow characteristic:VCZ_____1000: Quick-openingVCZ_____1100: Linearized
Service temperature ranges: 34F to 203F
Maximum pressure differential: 60 psiSee p 39, 41, 42, 44.
V5863
V4043,V8043
V4044,V8044
VC Valves
V5862
V5853
V5852
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VP512 Single-seated, Two-way valves with integral pneumatic actuator.
For two-position or modulating control of steam or hot water in unit ventilatorapplications.
Flow characteristic: Equal percentageService temperature ranges: 40F to 140FMaximum pressure differential (for normal disc and seat life):
Two-postion steam: 50 psi Two-position water: 75 psiModulating steam: 25 psi Modulating water: 35 psi
See p 18, 27.
VP513 Single-seated, Two-way valves with integral pneumatic actuator.
For two-position or modulating control of steam or hot water, or chilled water in unitair conditioner applications.
Flow characteristic: Equal percentageService temperature ranges: 35F to 250FMaximum pressure differential (with 13 psi in operator): 79 psiSee p 18.
VP525 Two-way radiator valves with integral pneumatic actuator.
For modulating control of steam or hot water systems.Flow characteristic: Modified linearService temperature range: 240F maximumMaximum pressure differential (for quiet service and normal life of disc and seat):
Water: 20 psi Steam: 10 psiSee p 18, 27.
VP527 Single seated, two-way, high pressure valves with integral
pneumatic actuator.
For modulating control of hot and/or chilled water in unit air conditioners and fan coilapplications.
Flow characteristic: Equal percentageService temperature range: 35F to 250FBody pressure rating: 250 psiSee p 18.
VP512
VP513B
VP525
VP527
VP513A
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VP531 Single seated, two-way valves with integral pneumatic actuator.
For modulating control of steam, hot or chilled water in terminal units. Available withNPT or sweat connections.
Flow characteristic: Modified equal percentageService temperature range: 240F maximumMaximum pressure differential (for quiet service and normal life of disc and seat):
Water: 20 psi Steam: 10 psiSee p 13, 22.
VP517 Three-way mixing valves with integral pneumatic actuator.
For two-position or modulating control of hot water, and/or chilled water in unit airconditioner and fan coil applications.
Flow characteristic: Constant totalService temperature ranges: 35F to 250FMaximum pressure differential: 50 psiSee p 15.
VP522 Three-way Sequencing valves with integral pneumatic actuator.For two-position or modulating control of hot and chilled water in unit fan coil andinduction applications.
Flow characteristic:VP522A: Equal percentageVP522B: Quick-opening
Service temperature range: 35F to 250FMaximum pressure differential:
VP522A: 50 psiVP522B: 15 psi difference in return line pressures, when used with the VP522A
See p 15.
VP526 Three-way, high pressure valves with integral pneumatic actuator.For modulating control of hot and/or chilled water in unit ventilator and fan coilapplications.
Flow characteristic: Linear and Constant totalService temperature range: 35F to 250FBody pressure rating: 250 psiSee p 15.
VP531 NPT
VP517
VP522
VP526
VP531 (Sweat)
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INTRODUCTION
This guide is designed to assist you in selecting valves for yourapplication. It provides procedures and provides the information foryou to choose an appropriate valve. It includes a valve sizingreference tool. The tables and figures contained herein provide aconvenient method for CVcalculation, valve and actuator selection;
if you prefer to use equations, they are provided in the Appendix.
SUMMARY OF THE VALVESELECTION PROCESS
Check the glossary (located in the back of this guide) for a definitionof terms that are unfamiliar to you. The need for properly sized valvescannot be overemphasized. Good control, economic operation, andlong equipment life are the benefits of proper valve sizing. Anoversized valve cannot control properly, and, if too large, cannotcontrol at all. At the same time, a valve that is too small will notprovide adequate flow.
IMPORTANTThe first step in selecting a valve is to determine themedium (water or steam).
Selecting Water ValvesThere are four more steps to choosing an appropriate water valve:
1. Determine the water medium temperature, pressure, and thepressure drop across the valve. (The valve pressure drop shouldbe equal to or greater than the pressure drop through the coil orradiator, plus the pipe and fittings connecting them to thesupply and return mains.)
2. Using this information and Table 2, calculate the required CVand/or pipe size.
3. Establish the required valve body configuration for theapplication. This is typically fixed by the particularapplication and often is included in the design specifications.Standard body configurations are: Two-way
Straight-through Angle Body
Three-way Diverting Mixing
4. Find the appropriate table (see the Quick Reference Guide,on the inside front cover). Follow the table, starting at theleftmost column. Proceed across the table until a specificvalve O.S. Number is selected.
NOTES: The calculated CVwill rarely match the CVof an availablevalve. Select the valve with the closest CVvalue. For
example, if the calculated CVis 87, and the two closest CVvalues are 63 and 100, the best choice would be a valvewith a CVof 100.
In general, water valves require equal percentage flow.Determine the composition of the medium. (Is a water/glycol solution required?) This is an important stepbecause glycol solutions may preclude using some valves.See Tables 3-8 for valves compatible with glycol solutions.
Selecting Steam ValvesThere are five more steps in choosing the appropriate steam valve:
1. Determine the steam medium temperature, pressure, and thepressure drop across the valve. (This is often determinedusing inlet vs. outlet pressures; for example: a valve with a75 psi inlet and a 50 psi outlet would have a pressure drop of25 psi.)
2. Using this information (and Tables 10 and 11), calculate theCVor select the pipe size.
3. Check the average pressure and the temperature to determinethe quality of the steam medium. The quality of the steam is: Saturated SuperheatedDetermining the quality of the steam is important becausesuperheated steam can preclude using some valves. Steam issuperheated (and can require a valve with a larger C
V) when
the temperature exceeds the boiling point noted in Propertiesof Saturated Steam (see inside back cover) for the averagepressure in question. The difference between the twotemperatures is the amount of superheat. Use the followingequation to determine the correct C
Vto use:
C C SV VCalculated= + [ ]1 0 0007( . )Where: S = superheat degrees (in Fahrenheit).
4. Establish the required valve body configuration for theapplication. This is typically fixed by the particularapplication and is often part of the design specifications.Standard body configurations are: Two-way
Straight-through Angle Body
NOTE: There are nothree-way steam valves.
5. Find the appropriate table (see the Quick Reference Guide,on the inside front cover). Follow the table, starting at theleftmost column. Proceed across the table until a specificvalve O.S. Number is selected.
NOTES: In general, steam valves require linear flow.
The calculated CVwill rarely match the CVof an availablevalve. Select the valve with the closest CVvalue. Forexample, if the calculated CVis 87, and the two closest CVvalues are 63 and 100, the best choice would be a valvewith a CVof 100.
GENERAL CONSIDERATIONSFOR SELECTING VALUES TOCALCULATE CV.
Factors that apply to all valve selections include control sensitivity,pressure drop, and closeoff.
IMPORTANT
Factors vary for valve selection when the valve to be usedis a ball valve. If you plan to use a ball valve, be sure to
read the Ball Valve Application Notes section.
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Control SensitivityThe control sensitivity is a measure of how well a valve performs inthe system. Ideally, the control system as a whole should have linearcontrol over its entire operating range; for example, a small increase intemperature should result in a small increase in cooling. Nonlinearsystems can cause a large increase in cooling with a small increase intemperature.
For a valve, the primary factor in control sensitivity is the flowcharacteristic. Steam applications usually require valves with linearflow characteristics, whereas hot water applications generallyrequire valves with equal percentage flow characteristics. In thecase of chilled water applications, the proper flow characteristicdepends on how close the water temperature is to the ambient airtemperature. For chilled water, the two temperatures are generallycloser together, and the flow characteristic should be linear.
Pressure DropThe pressure drop (or P) is the available pump pressure differentialbetween supply and return. It is calculated using the design flow atthe valve location. The pressure drop across the valve must be largeenough so that, as the valve starts to close, it diminishes the flow.
Generally, the desired pressure drop is the largest available becauseit provides the greatest resolution of control.
If the valve is oversized, the pressure drop will be too low. Thiscreates a situation in which the valve only needs to open slightly to
M11455
0%
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%PERCENTOFHEATOUTPUT
PERCENTOFHEATOUTPUT
100%
0%100%
PERCENT OF FULL FLOW
90%
80%
70%
60%
10%
50%
40%
40%
30%
30%
20%
20%
10%
50%60%
70% 90%80%
0%
PERCENT OF STEM TRAVEL PERCENT OF STEM TRAVEL
PERC
ENTOFFULLFLOW
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
100%
10%
40%30%
20%50%
60%70% 90%
80% 100%10%
40%30%
20%50%
60%70% 90%
80%
QUICK-OPENING
LINEAR
LINEAR
LINEAR
EQUALPERCENTAGE
EQUALPERCENTAGE
EQUALPERCENTAGE
Figure 1. Heat output, flow, and stem travel valve characteristics.
allow almost 100 percent flow. So, when the controller calls for asmall amount of heat, the valve opens a small amount, allowing toomuch flow. As a result, the controller signals to decrease the amountof heat and the valve closes completely. With the heat shut off, thecontroller calls for heat again and the cycle, often called hunting,continues.
One exception to the concern about oversized valves is the two-
position valve; because a two-position valve is either open orclosed, it is not important if the valve is slightly larger thannecessary. See Fig. 1 for information on heat output, flow and stemtravel characteristics.
CloseoffThe closeoff rating of a valve is the amount of force required for thevalve to close off against the existing flow. There are several valvesdesigned for applications where tight closeoff is not required; in otherwords, leakage through the valve is not an issue. Many applications donot allow for such a situation and the desired closeoff is tight. Becertain to choose the appropriate valve for the application. Valves notrated for tight closeoff are flagged in both the valve specification tableand the valve/actuator compatibility table.
IMPORTANT
In applications where valve closure failure is hazardous,the maximum upstream pressure must not exceed thecloseoff rating, regardless of downstream pressure.
BALL VALVE APPLICATION NOTES
Ball valves with very small ports, such as the VB30A1005 are mostsuitable for on/off control. If modulating control is required at small
CVcapacities around 1, a globe style valve may be a better choice.
EFFECTIVE CVValves mounted using pipe reducers decrease the capacity. The CVvalues in Table 1 must be used to size valves when pipe reducers arused; for example, a VB30A1088 (1-1/4 in., reduced port valve)used with 1-1/4 in. piping, results in a CVof 48. However, the samevalve mounted to 2 in. piping pipe reducers, results in a CVof 38.
All Ball ValvesBecause of the inherent high capacities of ball valves, pipe reducers
are almost always necessary. A valve mounted between pipereducers has a decreased capacity because of the pressure lossinduced by the reducers. To determine the proper CV data for valvesizing when reducers are required, see Table 1.
Unlike globe valves, differential pressure across a ball valve has anegligible effect (at typical hydronic system pressures) on theactuator force required to close the valve.
Two-way valves are shipped from the factory in the normally openposition. Three-way valves, normally open (as shipped from thefactory) is with flow from the side (inlet) port to the cast port (seeFig. 2).
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Figure 2. Three-way, ball valve stroke setting requirements and flow.
Table 1. Effective CVs using pipe reducers with ball valves.
RP = reduced port, FP = full port
CAST PORT(OUTLET)
SIDE PORT(INLET)
CAST PORT(OUTLET)
SIDE PORT(INLET)
FLOW= SIDE PORT TOCAST PORT WHEN LEVERIS AT 0(FULLY CCW)
FLOW= SIDE PORT TOINSERT PORT WHEN LEVERIS AT 90(FULLY CW)
FLOW= SIDE PORT TOCAST PORT AND INSERTPORT WHEN LEVERIS AT 45
CAST PORT(OUTLET)
SIDE PORT(INLET)
INSERT PORT(OUTLET)
INSERT PORT(OUTLET)
INSERT PORT(OUTLET)
M11454
Valve/Bracket Valve Size Rated Effective Cv
OS Number(s) (NPT) Cv Pipe Size (NPT)
2-way Valves 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4
VB30A1005, A1161 1/2 RP 1 1 1 1 1
VB30A1013, A1179 1/2 RP 2 2 2 2 2
VB30A1021, A1187 1/2 RP 4 4 3.7 3.5 3.4
VB30A1039, A1195 1/2 FP 15 15 13.2 11.9 10.4
VB30A1047, A1203 3/4 RP 30 30 24 20 19
VB30A1054, A1211 3/4 FP 51 51 35 28 27
VB30A1062 1 RP 43 43 35 34 31
VB30A1070, A1229 1 FP 68 68 56 55 48
VB30A1088 1 1/4 RP 48 48 44 38 35
VB30A1096, A1237 1 1/4 FP 125 125 106 81 68
VB30A1104 1 1/2 RP 84 84 59 52 48
VB30A1112, A1245 1 1/2 FP 177 177 120 106 93
VB30A1120, A1252 2 RP 108 108 96 89 81
3-way Valves 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4
VB30B1004, B1061 1/2 RP 5.6 5.6 5.2 4.9 4.9
VB30B1012, B1079 3/4 RP 12 12 11.3 10.6 10.5VB30B1020 1 RP 14 14 13.6 13.5 13.3
VB30B1038 1 1/4 RP 21 21 20 19 18
VB30B1046 1 1/2 RP 34 34 31 29 28
VB30B1053, B1087 2 RP 47 47 45 44 43
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WATER VALVE SELECTION
Selecting Control TypeThere are two control types that can be used, two-position (open/closed) and modulating (proportional).
Two-PositionA two-position valve can be sized using two methods. Method oneuses the actual pressure in the line when calculating the pressuredrop to minimize the drop. However, it is sometimes advantageous,or even required, to size a valve based on the pipe size. This is thesecond method, which determines the valve size for easyinstallation, because it is line sizedor the same size as the pipe. Todetermine which method is appropriate, consider that the pressuredrop and flow rate determine the life of the valve. A pressure dropthat is too large causes noisy valve operation and decreases the life-span of the valve. However, if the valve size is significantlydifferent from the piping, it will be difficult to install properly.
The rule of thumb when sizing two-position, two-way water valvesis to use 10 to 20 percent of the minimum difference betweensupply and return pressure at design operating conditions as thepressure drop. (This drop is typically between 2 and 5 psi.)
ModulatingModulating valves can be either two-way or three-way. Modulatingtwo-way valves typically throttle the flow of water to the load.Three-way valves can be mixing or diverting and have multipleapplications. When sizing a modulating valve, consider the pressurethroughout the valve travel. The pressure drop must be large enoughso that, as the valve starts to close, it can diminish the flow. If this isnot accomplished, the valve will not be able to maintain controlthroughout its entire range of travel. However, a pressure drop thatis too large causes noisy valve operation and decreases the life-spanof the valve.
Two-waySelect a two-way water valve for a pressure drop of 50 percent ormore of the controlled load. If the pressure is difficult to calculate,the normal procedure is to use a drop at least equal to the drop inthe coil (or other load being controlled) unless small booster pumpsare used. For secondary lines with small booster pumps, 50 percentof the available pressure difference (equal to the load drop or 50percent of the booster pump head) is the pressure drop to use.
Three-way
Select three-way water valves for a variety of applications. Three ofthe most common applications follow.
For coil bypass applications, use mixing valves. The recommendedpressure drop is 50 to 70 percent of the minimum differencebetween supply and return pressure at design operating conditions.
For mixing valves in boiler bypass applications, the recommendedmethod for determining pressure drop is:
1. Determine the design pressure drop through the boiler,including all piping, valves and fittings from the bypass con-nection through the boiler and up to the three-way valve input.
2. For accurate control results select a valve with a pressuredrop equal to or greater than this drop.
3. Optional: A manual balancing valve can be installed in theboiler bypass to equalize boiler drop and bypass drop.
Diverting valves are typically used to create a load bypass. The valveaccepts water from the supply and then throttles flow to the load,discharging the excess through a bypass line that connects with thereturn from the load. These valves control output the same way astwo-way throttling valves, and must be selected using the same highpressure drops to obtain accurate control results. Usually, the pressuredrop in a diverting valve equals the maximum value of the inletpressure minus the minimum value of the downstream pressure.
Calculating CVTo determine the appropriate CVrating, one must know:
Valve differential pressure (p)Flow rate (gpm)
Using these two values and Table 2, determine the calculated CVvalue for the application.
EXAMPLE: The job specifications require a three-waymixing valve with a flow rate of 225 gpm anda differential pressure of 15 psi. The value onthe chart that corresponds to these is 58.1.When control type and CVare known, seeTables 3 through 8 to select your valve. Thetwo CVratings around this value from Table 7are 40 and 63 (for a three-way valve). Becaus40 is too small, a valve with a CVof 63 (suchas the V5013B1003) must be used.
In most cases, including the above example, the required CVfallsbetween two valve sizes. If the pressure drop associated with the
smaller valve is acceptable for the application, select the smallervalve; otherwise, use the larger valve. More than likely, asillustrated in the above example, the larger valve must be used.
Finalize Valve SelectionOnce the Control Type and CVare known, the appropriate valve canbe selected using Tables 3 through 8. Prior to finalizing a valve choiceverify suitability by comparing job requirements to existing valvespecifications. If the initial selection does not meet the requiredspecifications, check the table again for an appropriate valve.
EXAMPLE: If you chose the V5013B1003 (as noted in theabove Calculating CVexample), but the jobspecifications require a three-way mixing valvewith an equal percentage flow characteristic, it
will not work because it has a constant totalflow characteristic. However, the V3361E2007has an equal percentage flow characteristic andalso meets the other requirements.
Water Valve Selectio
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Table 2: Calculating CVusing pressure drop and flow rate.
Flow Flow
Rate Pressure Drop Across the Valve (psi) Rate
(gpm) 0.5 1 2 4 6 8 10 15 20 25 30 35 40 45 50 60 70 80 90 100 160 (m3 /hr)
0.5 0.71 0.50 0.35 0.25 0.20 0.18 0.1
1 1.4 1.0 0.71 0.50 0.41 0.35 0.32 0.26 0.22 0.20 0.18 0.2
2 2.8 2.0 1.4 1.0 0.82 0.71 0.63 0.52 0.45 0.40 0.37 0.34 0.5
4 5.7 4.0 2.8 2.0 1.6 1.4 1.3 1.0 0.89 0.80 0.73 0.68 0.63 0.60 0.57 0.9
6 8.5 6.0 4.2 3.0 2.4 2.1 1.9 1.5 1.3 1.2 1.1 1.0 0.95 0.89 0.85 1.4
8 11.3 8.0 5.7 4.0 3.3 2.8 2.5 2.1 1.8 1.6 1.5 1.4 1.3 1.2 1.1 1.0 1.0 0.89 0.84 1.8
10 14.1 10.0 7.1 5.0 4.1 3.5 3.2 2.6 2.2 2.0 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.1 1.0 0.79 2.3
15 21.2 15.0 10.6 7.5 6.1 5.3 4.7 3.9 3.4 3.0 2.7 2.5 2.4 2.2 2.1 1.9 1.8 1.7 1.6 1.5 1.2 3.4
20 28.3 20.0 14.1 10.0 8.2 7.1 6.3 5.2 4.5 4.0 3.7 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.1 2.0 1.6 4.5
25 35.4 25.0 17.7 12.5 10.2 8.8 7.9 6.5 5.6 5.0 4.6 4.2 4.0 3.7 3.5 3.2 3.0 2.8 2.6 2.5 2.0 5.7
30 42.4 30.0 21.2 15.0 12.2 10.6 9.5 7.7 6.7 6.0 5.5 5.1 4.7 4.5 4.2 3.9 3.6 3.4 3.2 3.0 2.4 6.8
35 49.5 35.0 24.7 17.5 14.3 12.4 11.1 9.0 7.8 7.0 6.4 5.9 5.5 5.2 4.9 4.5 4.2 3.9 3.7 3.5 2.8 7.9
40 56.6 40.0 28.3 20.0 16.3 14.1 12.6 10.3 8.9 8.0 7.3 6.8 6.3 6.0 5.7 5.2 4.8 4.5 4.2 4.0 3.2 9.1
45 63.6 45.0 31.8 22.5 18.4 15.9 14.2 11.6 10.1 9.0 8.2 7.6 7.1 6.7 6.4 5.8 5.4 5.0 4.7 4.5 3.6 10.2
50 70.7 50.0 35.4 25.0 20.4 17.7 15.8 12.9 11.2 10.0 9.1 8.5 7.9 7.5 7.1 6.5 6.0 5.6 5.3 5.0 4.0 11.4
60 84.9 60.0 42.4 30.0 24.5 21.2 19.0 15.5 13.4 12.0 11.0 10.1 9.5 8.9 8.5 7.7 7.2 6.7 6.3 6.0 4.7 13.6
70 99.0 70.0 49.5 35.0 28.6 24.7 22.1 18.1 15.7 14.0 12.8 11.8 11.1 10.4 9.9 9.0 8.4 7.8 7.4 7.0 5.5 15.9
80 113.1 80.0 56.6 40.0 32.7 28.3 25.3 20.7 17.9 16.0 14.6 13.5 12.6 11.9 11.3 10.3 9.6 8.9 8.4 8.0 6.3 18.2
90 127.3 90.0 63.6 45.0 36.7 31.8 28.5 23.2 20.1 18.0 16.4 15.2 14.2 13.4 12.7 11.6 10.8 10.1 9.5 9.0 7.1 20.4
100 141.4 1 00.0 70.7 50.0 40.8 35.4 31.6 25.8 22.4 20.0 18.3 16.9 15.8 14.9 14.1 12.9 12.0 11.2 10.5 10.0 7.9 22.7
125 176.8 1 25.0 88.4 62.5 51.0 44.2 39.5 32.3 28.0 25.0 22.8 21.1 19.8 18.6 17.7 16.1 14.9 14.0 13.2 12.5 9.9 28.4
150 212.1 150.0 106.1 75.0 61.2 53.0 47.4 38.7 33.5 30.0 27.4 25.4 23.7 22.4 21.2 19.4 17.9 16.8 15.8 15.0 11.9 34.1
175 247.5 175.0 123.7 87.5 71.4 61.9 55.3 45.2 39.1 35.0 32.0 29.6 27.7 26.1 24.7 22.6 20.9 19.6 18.4 17.5 13.8 39.7
200 282.8 200.0 141.4 100.0 81.6 70.7 63.2 51.6 44.7 40.0 36.5 33.8 31.6 29.8 28.3 25.8 23.9 22.4 21.1 20.0 15.8 45.4
250 353.6 250.0 176.8 125.0 102.1 88.4 79.1 64.5 55.9 50.0 45.6 42.3 39.5 37.3 35.4 32.3 29.9 28.0 26.4 25.0 19.8 56.8
300 424.3 300.0 212.1 150.0 122.5 106.1 94.9 77.5 67.1 60.0 54.8 50.7 47.4 44.7 42.4 38.7 35.9 33.5 31.6 30.0 23.7 68.1
350 495.0 350.0 247.5 175.0 142.9 123.7 110.7 90.4 78.3 70.0 63.9 59.2 55.3 52.2 49.5 45.2 41.8 39.1 36.9 35.0 27.7 79.5
400 565.7 400.0 282.8 200.0 163.3 141.4 126.5 103.3 89.4 80.0 73.0 67.6 63.2 59.6 56.6 51.6 47.8 44.7 42.2 40.0 31.6 90.8
450 450.0 318.2 225.0 183.7 159.1 142.3 116.2 100.6 90.0 82.2 76.1 71.2 67.1 63.6 58.1 53.8 50.3 47.4 45.0 35.6 102.2
500 500.0 353.6 250.0 204.1 176.8 158.1 129.1 111.8 100.0 91.3 84.5 79.1 74.5 70.7 64.5 59.8 55.9 52.7 50.0 39.5 113.6
550 550.0 388.9 275.0 224.5 194.5 173.9 142.0 123.0 110.0 100.4 93.0 87.0 82.0 77.8 71.0 65.7 61.5 58.0 55.0 43.5 124.9600 600.0 424.3 300.0 244.9 212.1 189.7 154.9 134.2 120.0 109.5 101.4 94.9 89.4 84.9 77.5 71.7 67.1 63.2 60.0 47.4 136.3
650 459.6 3 25.0 2 65.4 2 29.8 2 05.5 1 67.8 1 45.3 1 30.0 1 18.7 1 09.9 1 02.8 96.9 91.9 83.9 77.7 72.7 68.5 65.0 51.4 147.6
700 495.0 3 50.0 2 85.8 2 47.5 2 21.4 1 80.7 1 56.5 1 40.0 1 27.8 1 18.3 1 10.7 1 04.3 99.0 90.4 83.7 78.3 73.8 70.0 55.3 159.0
750 530.3 375.0 306.2 265.2 237.2 193.6 167.7 150.0 136.9 126.8 118.6 111.8 106.1 96.8 89.6 83.9 79.1 75.0 59.3 170.3
800 565.7 4 00.0 3 26.6 2 82.8 2 53.0 2 06.6 1 78.9 1 60.0 1 46.1 1 35.2 1 26.5 1 19.3 1 13.1 1 03.3 95.6 89.4 84.3 80.0 63.2 181.7
850 425.0 347.0 300.5 268.8 219.5 190.1 170.0 155.2 143.7 134.4 126.7 120.2 109.7 101.6 95.0 89.6 85.0 67.2 193.1
900 450.0 367.4 318.2 284.6 232.4 201.2 180.0 164.3 152.1 142.3 134.2 127.3 116.2 107.6 100.6 94.9 90.0 71.2 204.4
950 475.0 3 87.8 335.9 300.4 245.3 2 12.4 190.0 173.4 160.6 1 50.2 141.6 134.4 122.6 1 13.5 106.2 100.1 95.0 75.1 215.8
1000 500.0 4 08.2 3 53.6 3 16.2 2 58.2 223.6 200.0 182.6 169.0 158.1 149.1 141.4 129.1 119.5 1 11.8 1 05.4 1 00.0 79.1 227.1
1500 530.3 474.3 387.3 335.4 300.0 273.9 253.5 237.2 223.6 212.1 193.6 179.3 167.7 158.1 150.0 118.6 340.7
2000 516.4 447.2 400.0 365.1 338.1 316.2 298.1 282.8 258.2 239.0 223.6 210.8 200.0 158.1 454.2
2500 559.0 500.0 456.4 422.6 395.3 372.7 353.6 322.7 298.8 279.5 263.5 250.0 197.6 567.8
3000 600.0 547.7 507.1 474.3 447.2 424.3 387.3 358.6 335.4 316.2 300.0 237.2 681.4
3500 591.6 553.4 521.7 495.0 451.8 418.3 391.3 368.9 350.0 276.7 794.9
4000 596.3 565.7 516.4 478.1 447.2 421.6 400.0 316.2 908.5
3.4 6.9 13.8 27.6 41.4 55.2 68.9 103 138 172 207 241 276 310 345 414 483 552 621 689 1103
Pressure Drop Across the Valve (kPa)
Water Valve Selection
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Table 3. Two-way, two-position, water globe valve characteristics.
continued on next pag
Water Valve Selectio
Cv Water Size Body ANSI Connection Flow Trim
Rating Glycol? (in.) Straight Angle Material Rating NPT Flange Modulating Characteristic Seat Disc OS Number
0.63 No 1/2 DA Bronze 150 X X Equal percentage Brass Teflon V5011F1006
1 V5011F1014
1.6 V5011F1022
2.5 V5011F1121
RA V5011H1002
3.8 DA/RAc Brass 125 No Quick-opening Composition V5045A1122c
DA/RAc V5045A1189c
4 DA Bronze 150 X Equal percentage Teflon V5011F1139
RA V5011H1010
5.4 No 3/4 DA/RAc Brass 125 X No Quick-opening Brass Composition V5045A1130c
DA/RAc V5045A1197c
6.3 DA Bronze 150 X Equal percentage Teflon V5011F1147
RA V5011H1028
10 1 DA V5011F1154
RA V5011H1036
10.8 DA/RAc Brass 125 No Quick-opening Composition V5045A1148c
DA/RAc V5045A1205c
16 No 1-1/4 DA/RAc Brass 125 X No Quick-opening Brass Composition V5045A1155c
DA/RAc V5045A1213c
DA Bronze 150 X Equal percentage Teflon V5011F1162
RA V5011H1044
25 1 -1/2 DA/RAc Brass 125 No Quick-opening Composition V5045A1163c
DA/RAc V5045A1221c
DA Bronze 150 X Equal percentage Teflon V5011F1170
40 No 2 DA/RAc Brass 125 X No Quick-opening Brass Composition V5045A1171c
DA/RAc V5045A1239c
DA Bronze 150 X Equal percentage Teflon V5011F1188
Modified Linear Metal-to-Metal Metal-to-Metal V5011G1103
63 Yes (up 2-1/2 DA Cast-Iron 125 X Xa Equal percentage Metal-to-Metal Metal-to-Metal V3350A2009
to 50%) Linear V3350A2017
Xb Equal percentage Brass Bronze V3351A2008
250 X Xa Metal-to-Metal Metal-to-Metal V3450A2008
Linear V3450A2016Xb Equal percentage Brass Bronze V3451A2007
RA Cast-Iron 125 X Xa Metal-to-Metal Metal-to-Metal V3350C2005
Linear V3350C2013
Xb Equal percentage Brass Bronze V3351C2004
250 X Xa Metal-to-Metal Metal-to-Metal V3450C2004
Linear V3450C2012
Xb Equal percentage Brass Bronze V3451C2003
No DA Bronze 150 X X Teflon V5011F1196
Modified Linear Metal-to-Metal Metal-to-Metal V5011G1111
125 X X Equal percentage Bronze Composition V5011A1734
100 Yes (up 3 DA Cast-Iron 125 X X Equal percentage Metal-to-Metal Metal-to-Metal V3350A3007
to 50%) Linear V3350A3015
Xb Equal percentage Brass Bronze V3351A3006
250 X X Metal-to-Metal Metal-to-Metal V3450A3006
Linear V3450A3014
Xb Equal percentage Brass Bronze V3451A3005
RA Cast-Iron 125 X X Metal-to-Metal Metal-to-Metal V3350C3003
Linear V3350C3011
Xb Equal percentage Brass Bronze V3351C3002
250 X X Metal-to-Metal Metal-to-Metal V3450C3002
Linear V3450C3010
Xb Equal percentage Brass Bronze V3451C3001
No DA Bronze 150 X X Teflon V5011F1204
X Modified Linear Metal-to-Metal Metal-to-Metal V5011G1129
Cast-Iron 125 X X Equal percentage Bronze Composition V5011A1767
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Table 3. Two-way, two-position, water globe valve characteristics (continued).
a For Modulating Service, the maximum pressure differential of the valve is 50 psi.b For Modulating Service, the maximum pressure differential of the valve is 25 psi.c The V5045 Valve requires using a V2045 Actuator which is a two-position floating actuator. The valve can be used as a direct acting or
reverse acting valve.
Water Valve Selection
Cv Water Size Body ANSI Connection Flow Trim
Rating Glycol? (in.) Straight Angle Material Rating NPT Flange Modulating Characteristic Seat Disc OS Number
160 Yes (up 4 DA Cast-Iron 125 X X Equal percentage Metal-to-Metal Metal-to-Metal V3350A4005
to 50%) Brass Bronze V3351A4004
Linear Metal-to-Metal Metal-to-Metal V3350A4013
250 X X Equal percentage V3450A4004
Brass Bronze V3451A4003
Linear Metal-to-Metal Metal-to-Metal V3450A4012
RA Cast-Iron 125 X X Equal percentage V3350C4001
Brass Bronze V3351C4000
Linear Metal-to-Metal Metal-to-Metal V3350C4019
250 X X Equal percentage V3450C4000
Brass Bronze V3451C4009
Linear Metal-to-Metal Metal-to-Metal V3450C4018
No DA Cast-Iron 125 X X Equal percentage Bronze Composition V5011A1858
RA V5011B1013
250 Yes (up 5 DA Cast-Iron 125 X X Equal percentage Metal-to-Metal Metal-to-Metal V3350A5002
to 50%) Brass Bronze V3351A5001
Linear Metal-to-Metal Metal-to-Metal V3350A5010
250 X X Equal percentage V3450A5001
Brass Bronze V3451A5000
Linear Metal-to-Metal Metal-to-Metal V3450A5019
RA Cast-Iron 125 X X Equal percentage V3350C5008
Brass Bronze V3351C5007
Linear Metal-to-Metal Metal-to-Metal V3350C5016
250 X X Equal percentage V3450C5007
Brass Bronze V3451C5006
Linear Metal-to-Metal Metal-to-Metal V3450C5015
No DA Cast-Iron 125 X X Equal percentage Bronze Composition V5011A1882
RA V5011B1047
360 No 6 DA Cast-Iron 125 X X Equal percentage Bronze Composition V5011A1916
RA V5011B1070
400 Yes (up 6 DA Cast-Iron 125 X X Equal percentage Metal-to-Metal Metal-to-Metal V3350A6000
to 50%) Brass Bronze V3351A6009
Linear Metal-to-Metal Metal-to-Metal V3350A6018
250 X X Equal percentage V3450A6009
Brass Bronze V3451A6008
Linear Metal-to-Metal Metal-to-Metal V3450A6017
RA Cast-Iron 125 X X Equal percentage V3350C6006
Brass Bronze V3351C6005
Linear Metal-to-Metal Metal-to-Metal V3350C6014
250 X X Equal percentage V3450C6005
Brass Bronze V3451C6004
Linear Metal-to-Metal Metal-to-Metal V3450C6013
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Table 4. Two-way, water specialty valve characteristics.
a Valve can be used with Water/Glycol medium to 50 percent.b Valve operation is dependent on actuator used; it can be direct acting or reverse acting.
Table 5. Two-way, water ball valve characteristics.
NOTE: May be used with water/glycol solutions (up to 50 percent). All models have NPT connections, 600 psi body rating, equal percentageflow charateristic.
Water Valve Selectio
Cv Water/ Size Body ANSI Connection Flow OS
Rating Glycol? (in.) Straight Angle Rating NPT Flange Sweat Modulating Valve Type Characteristic Number
4.6 No 1/2 DA/RAb 150 X X Thermally Linear V5086A1015
X Operatede V5086A1007
DA/RAb X V5086A1023
5.8 No 3/4 DA/RAb V5086A1049
X V5086A1031DA/RAb X V5086A1056
7 No 1 DA/RAb V5086A1064
DA/RAb V5086A1072
1 1/4 DA/RAb V5086A1080
DA/RAb V5086A1098
13 Yesa 1 DA 125 X No Double Equal V5047A1005
20 1 1/4 Seated percentage V5047A1013
30 1 1/2 V5047A1021
50 2 V5047A1039
75 Yesa 2 1/2 DA 125 X X Single Modified V5051A1008
116 3 Seated Cage Linear V5051A1016
178 4 V5051A1024
318 5 V5051A1032
390 6 V5051A1040
n/a No 1 1/2 DA/RAb n/a X X Butterfly n/a V51B1007
2 V51B1023
2 1/2 V51B1221
3 V51B1239
4 V51B1247
Port Actuator
CvRating Size (in.) Reduced Full Spring Return Non-Spring Return OS Number1 1/2 X X VB30A1005
X VB30A1161
2 X VB30A1013
X VB30A1179
4 X VB30A1021
X VB30A1187
15 X X VB30A1039
X VB30A1195
30 3/4 X X VB30A1047
X VB30A1203
43 1 X X X VB30A1062
48 1 1/4 VB30A1088
X VB30A1278
51 3/4 X VB30A1054X X VB30A1211
68 1 X VB30A1070
VB30A1260
84 1 1/2 X X X VB30A1104
X VB30A1286
108 2 VB30A1120
125 1 1/4 X X VB30A1096
177 1 1/2 VB30A1112
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Table 6. Two-way, water valve (with integral pneumatic actuator) characteristics.
continued on next page
Water Valve Selection
Spring Closeoff (psi) Max. Medium
Cv Range at Main Size Body ANSI Connection Temperature Flow OS
Rating (psi) Rating Pressure (in.) Straight Angle Rating Flare NPT Sweat (F) Characteristic Number
0.63 2-5 130 8 1/2 O.D. DA 250 X Equal percentage VP527A1059
3-8 115 10 1/2 150 X VP512A1205
3-10 85 13 180 Modified Linear VP525A1408240 VP525C1008
130 1/2 O.D. 250 X Equal percentage VP527A1018
1 2-5 45 8 1/2 O.D. DA 250 X Equal percentage VP527A1067
3-8 115 10 1/2 150 X VP512A1213
3-10 45 13 1/2 O.D. 250 X VP527A1026
9-13 50 7 5/8 O.D. RA VP513B1012
1.6 2-5 15 8 1/2 DA 250 X 180 Modified Equal percentage VP531A1004
5/8 O.D. X VP531A1087
45 1/2 O.D. X Equal percentage VP527A1075
3-8 115 10 1/2 150 X VP512A1221
3-10 15 13 250 180 Modified Equal percentage VP531A1012
240 VP531C1000
5/8 O.D. X 180 VP531A1095
240 VP531C1034
45 1/2 O.D. X Equal percentage VP527A1034
9-13 50 7 5/8 O.D. RA VP513B1038
2 2-5 30 13 1/2 DA 150 X 180 Modified Linear VP525A1416
3-10 VP525A1077
240 VP525C1016
DA 180 VP525A1085
3/4 240 VP525C1040
2.3 2-5 15 8 1/2 DA 250 X 180 Modified Equal percentage VP531A1020
3-10 13 VP531A1038
2.5 3-7 79 13 5/8 O.D. DA 250 X Equal percentage VP513A1188
3-8 115 1/2 150 X VP512A1643
3-10 79 5/8 O.D. 250 X VP513A1204
7/8 O.D. VP513A1048
9-13 50 7 5/8 O.D. RA VP513B1053
2.6 2-5 15 8 3/4 DA 250 X 180 Modified Equal percentage VP531A1046
7/8 O.D. X VP531A1103
3-10 13 3/4 X VP531A1053
240 VP531C1018
7/8 O.D. X 180 VP531A1111
240 VP531C1042
3 2-5 15 13 1/2 DA a 150 X 180 Modified Linear VP525A1119
DAa VP525A1135
3-10 DA a VP525A1101
DAa VP525A1127
3/4 DA VP525A1150
240 VP525C1024
DA 180 VP525A1168
240 VP525C1057
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Table 6. Two-way, water valve (with integral pneumatic actuator) characteristics (continued).
a Integral Seats.
Table 7. Three-way, water globe valve characteristics.
Water Valve Selectio
a Stainless Steel trim.b Bronze trim.
Spring Closeoff (psi) Max. Medium
Cv Range at Main Size Body ANSI Connection Temperature Flow OS
Rating (psi) Rating Pressure (in.) Straight Angle Rating Flare NPT Sweat (F) Characteristic Number
3.3 2-5 15 8 3/4 DA 250 X 180 Modified Equal percentage VP531A1061
7/8 O.D. X VP531A1129
3-10 13 3/4 X VP531A1079240 VP531C1026
7/8 O.D. X 180 VP531A1137
240 VP531C1059
4 3-8 50 10 3/4 DA 150 X Equal percentage VP512A1270
DA VP512A1494
150 13 VP512A1510
3-10 79 7/8 O.D. DA 250 X VP513A1055
6-11 150 3/4 150 X VP512A1296
5 2-5 12 13 3/4 DA 150 X 180 Modified Linear VP525A1200
DA VP525A1226
3-10 1/2 DA 240 VP525C1032
3/4 180 VP525A1192
DA VP525A1218
240 VP525C1065
6.3 3-8 82 13 3/4 DA 150 X Equal percentage VP512A1684
DA VP512A1700
10 3-8 70 13 1 DA 150 X Equal percentage VP512A1726
DA VP512A1742
16 3-8 35 13 1 1/4 DA 150 X Equal percentage VP512A1767
DA VP512A1783
continued on next pag
Cv Type Water/ Size ANSI Connection Flow OS
Rating Mixing Diverting Glycol? (in.) Rating NPT Flange Characteristic Number
2.5 X No 1/2 150 X Constant Total V5013F1004
4 1/2 V5013F1079
6.3 3/4 V5013F1087
10 1 V5013F1095
16 X No 1 1/4 150 X Constant Total V5013F1103
25 1 1/2 V5013F1053
V5013F1111
40 2 V5013F1129
63 X Yes 2 1/2 125 X Equal percentage V3360E2008a
V3361E2007b
250 V3460E2007aV3461E2006b
No 2 1/2 125 Constant Total V5013B1003
X V5013C1001
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Table 7. Three-way, water globe valve characteristics (continued).
a Stainless Steel trim.b Bronze trim.
Table 8. Three-way, reduced port water ball valve characteristics.
NOTES: All models may be used with water/glycol solutions (up to 50% glycol). All models have NPT connections, 400 psi body rating,
linear flow characteristic.
For mixing applications do not exceed differential pressure of 60 psig.
Water Valve Selection
Actuator
Cv Rating Size (in.) Spring Return Non-Spring Return OS Number
5.4 1/2 X VB30B1004
X VB30B1061
12 3/4 X VB30B1012
X VB30B1079
14 1 X X VB30B1020
21 1 1/4 VB30B1038
X VB30B1095
34 1 1/2 X X VB30B1046
X VB30B1103
47 2 VB30B1053
CV Type Water/ Size ANSI Connection Flow OS
Rating Mixing Diverting Glycol? (in.) Rating NPT Flange Characteristic Number
100 X No 3 125 X Constant Total V5013B1011
Yes Equal percentage V3360E3006a
V3361E3005b
250 V3460E3005a
V3461E3004b
X No 125 Constant Total V5013C1019
160 X No 4 125 X Constant Total V5013B1029
Yes Equal percentage V3360E4004a
V3361E4003b
250 V3460E4003a
V3461E4002b
X No 125 Constant Total V5013C1027
250 X No 5 125 X Constant Total V5013B1037
Yes Equal percentage V3360E5001a
V3361E5000b
250 V3460E5000a
V3461E5009bX No 125 Constant Total V5013C1035
360 X No 6 125 X Constant Total V5013B1045
X V5013C1043
400 X Yes 6 125 X Equal percentage V3360E6009a
V3361E6008b
250 V3460E6008a
V3461E6007b
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Table 9. Three-way, water valve (with integral pneumatic actuator) characteristics.
a B-port pressure (A-port pressure: 2 psi).
Water Valve Selectio
Spring Closeoff (psi)
Cv Type Range at Main Size ANSI Flow OS
Rating Mixing Sequencing (psi) Rating Pressure (in.) Rating Characteristic Number
1 X 2-5 58 13 3/8 250 Constant total VP526A1084
3-10 15 VP526A1068
8-11 50 18 VP526A11001.5 Diverting 0-15 15 13 Quick-opening VP522B1003
Proportioning 50 Equal percentage VP522A1005
1.6 X 2-5 58 13 3/8 250 Constant total VP526A1092
1/2 VP526A1027
3-10 15 3/8 VP526A1076
1/2 VP526A1001
8-11 50 18 3/8 VP526A1118
1/2 VP526A1043
2.5 Diverting 0-15 15 13 1/2 250 Quick-opening VP522B1011
Proportioning 50 Equal percentage VP522A1039
X 2-5 58 Constant total VP526A1035
3-10 15 VP526A1019
8-11 50 18 VP526A1050
3 X 3-10 50 12a 3/4 250 Constant total VP517A1044
4 Diverting 0-15 15 13 Quick-opening VP522B1029
Proportioning 45 Equal percentage VP522A1047
X 3-10 50 12a Constant total VP517A1069
6.3 14a VP517A1077
8-12 VP517A1150
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STEAM VALVE SELECTION
Selecting Control TypeAll steam valves are two-way valves (except for the V5086B, whichis a single-port, thermostatic actuated steam valve). There are twovalve operations control types, two-position (open/closed) andmodulating (proportional).
Two-PositionTwo-position steam valves are typically selected based on the pipesize of the line; for example, if the pipe size is three inches indiameter, you would select a three inch steam valve.
ModulatingTwo-way modulating steam valves are typically used to throttle theflow of steam in proportion to the load. Similar to water valves, whensizing a modulating valve for steam, consider the pressure throughoutthe valve travel. The pressure drop must be large enough so that, as thevalve starts to close, it can diminish the flow. If this is notaccomplished, the valve is not able to maintain control throughout itsentire range of travel. However, a pressure drop that is too large causes
noisy valve operation and decreases the life-span of the valve.
Calculating CVTo determine the appropriate CVrating, one must know:
Supply pressure (psi)Valve differential pressure (p)Flow rate (lb/hr)
Supply Return Pressure (psig) Supply
(psig) 0 1 2 3 4 5 6 7 8 9 10 11 12 15 20 2 5 30 40 50 60 70 (Bar)
2 4.0 5.5 0.1
3 3.2 3.9 5.4 0.2
4 2.7 3.1 3.7 5.2 0.3
5 2.4 2.7 3.0 3.7 5.1 0.3
6 2.2 2.3 2.6 2.9 3.6 5.0 0.4
7 2.0 2.1 2.3 2.5 2.9 3.5 4.9 0.5
8 1.8 1.9 2.1 2.2 2.5 2.8 3.4 4.8 0.6
9 1.7 1.8 1.9 2.0 2.2 2.4 2.8 3.3 4.7 0.6
10 1.6 1.7 1.7 1.8 2.0 2.1 2.4 2.7 3.3 4.6 0.7
11 1.5 1.6 1.6 1.7 1.8 1.9 2.1 2.3 2.6 3.2 4.5 0.8
12 1.4 1.5 1.5 1.6 1.7 1.8 1.9 2.0 2.3 2.6 3.1 4.4 0.8
15 1.2 1.3 1.3 1.3 1.4 1.4 1.5 1.6 1.7 1.8 1.9 2.1 2.5 1.0
2 0 1.0 1.0 1.0 1.1 1.1 1.1 1.1 1.2 1.2 1.3 1.3 1.4 1.4 1.8 1.4
2 5 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.0 1.0 1.0 1.0 1.1 1.1 1.2 1.7 1.7
3 0 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.9 0.9 0.9 1.0 1.1 1.6 2.1
4 0 0.7 0.7 0.7 0.6 0.6 0.6 0.6 0.6 0.6 0.7 0.7 0.7 0.7 0.7 0.8 0.9 1.0 2.85 0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.6 0.6 0.7 0.9 3.4
6 0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.6 0.9 4.1
7 0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 0.5 0.6 0.8 4.8
8 0 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5 0.6 0.8 5.5
.00 .07 .14 .21 .28 .34 .41 .48 .55 .62 .69 .76 .83 1.03 1 .38 1 .72 2 .07 2 .76 3 .45 4 .14 4 .83
Return Pressure (Bar)
Using the supply pressure, differential pressure and Table 10,determine the value of Factor A for the application. Then using FactorA, the flow rate and Table 11, determine the CVfor the application.
IMPORTANT
If the steam is superheated, it can require a valve with alarger CV. Steam is superheated when the temperatureexceeds that noted in Properties of Saturated Steam section
(inside back cover) for the given average pressure. If this isthe case, the difference between the two temperatures is theamount of superheat. Use the following equation todetermine the correct CVto use:
C C SV VCalculated= + [ ]1 0 0007( . )Where: S = degrees of superheat (in Fahrenheit).
EXAMPLE: The job specifications require a direct acting two-way valve with a supply of 30 psi, a pressuredrop of 5 psi and a flow rate of 4000 lb/hr. With asupply of 30 psi and a return of 25 psi, Table 10provides 1.5 as the value of Factor A. Then, using1.5 and the flow rate of 4000 lb/hr, the value fromTable 11 is 94. The two CVratings from Table 12
around this value are 63 and 100. Because 63 istoo small, a two-way valve with a CVof 100(such as the V5011G1129) must be used.
In most cases, including the above example, the calculated CVfallsbetween two valve sizes. When this happens, use a valve with the nexthigher CVvalue unless the calculated CVis within 10 percent of thenext lower CVvalue.
Table 10. Calculation of Factor A for steam valves.
Steam Valve Selection
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Table 11. Steam valve CVfinal calculation.
Finalize Valve SelectionWith the Control Type and CVknown, select the appropriate valveusing Tables 12 through 15. Prior to finalizing a choice, verifysuitability by comparing job requirements to existing valvespecifications. If the initial selection does not meet the requiredspecifications, check the table again for an appropriate valve.
EXAMPLE: If you chose the V5011G1129 (as noted in theabove Calculating CVexample), but the jobspecifications require a two-way valve with anequal percentage flow characteristic, theV5011G1129 will not work because it has amodified linear flow characteristic. However,the V3351A3006 and V3451A3005 both havean equal percentage flow characteristic. Thechoice between them depends on the ANSI(pressure) rating requirement.
Steam Flow Rate (in lb/hr)
5 10 25 50 75 100 200 300 400 500 600 700 800 900 1k 2k 3k 4k 5k 7.5k 10k 20k 30k
0.4 0.16 0.31 0.47 0.63 1.26 1.9 2.5 3.1 3.8 4.4 5.0 5.7 6.3 13 19 25 31 47 63 126 189
0.5 0.08 0.20 0.39 0.59 0.79 1.6 2.4 3.1 3.9 4.7 5.5 6.3 7.1 7.9 16 24 31 39 59 79 157 236
0.6 0.09 0.24 0.47 0.71 0.94 1.9 2.8 3.8 4.7 5.7 6.6 7.6 8.5 9.4 19 28 38 47 71 94 189 283
0.7 0.11 0.28 0.55 0.83 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 9.9 11.0 22 33 44 55 83 110 220 331
0.8 0.13 0.31 0.63 0.94 1.3 2.5 3.8 5.0 6.3 7.6 8.8 10.1 11.3 13 25 38 50 63 94 126 252 378
0.9 0.14 0.35 0.71 1.1 1.4 2.8 4.3 5.7 7.1 8.5 9.9 11.3 13 14 28 43 57 71 106 142 283 425
1 0.16 0.39 0.79 1.2 1.6 3.1 4.7 6.3 7.9 9.4 11.0 13 14 16 31 47 63 79 118 157 315 472
1.1 0.17 0.43 0.87 1.3 1.7 3.5 5.2 6.9 8.7 10.4 12 14 16 17 35 52 69 87 130 173 346 520
1.2 0.19 0.47 0.94 1.4 1.9 3.8 5.7 7.6 9.4 11.3 13 15 17 19 38 57 76 94 142 189 378 567
1.3 0.10 0.20 0.51 1.0 1.5 2.0 4.1 6.1 8.2 10.2 12 14 16 18 20 41 61 82 102 154 205 409 614
1.4 0.11 0.22 0.55 1.1 1.7 2.2 4.4 6.6 8.8 11.0 13 15 18 20 22 44 66 88 110 165 220 441
1.5 0.12 0.24 0.59 1.2 1.8 2.4 4.7 7.1 9 12 14 17 19 21 24 47 71 94 118 177 236 472
1.6 0.13 0.25 0.63 1.3 1.9 2.5 5.0 7.6 10.1 13 15 18 20 23 25 50 76 101 126 189 252 504
1.7 0.13 0.27 0.67 1.3 2.0 2.7 5.4 8.0 10.7 13 16 19 21 24 27 54 80 107 134 201 268 535
1.8 0.14 0.28 0.71 1.4 2.1 2.8 5.7 8.5 11.3 14 17 20 23 26 28 57 85 113 142 213 283 567
1.9 0.15 0.30 0.75 1.5 2.2 3.0 6.0 9.0 12 15 18 21 24 27 30 60 90 120 150 224 299 598
2 0.16 0.31 0.79 1.6 2.4 3.1 6.3 9.4 13 16 19 22 25 28 31 63 94 126 157 236 315 630
2.1 0.17 0.33 0.83 1.7 2.5 3.3 6.6 9.9 13 17 20 23 26 30 33 66 99 132 165 248 331
F 2.2 0.17 0.35 0.87 1.7 2.6 3.5 6.9 10.4 14 17 21 24 28 31 35 69 104 139 173 260 346
A 2.3 0.18 0.36 0.91 1.8 2.7 3.6 7.2 10.9 14 18 22 25 29 33 36 72 109 145 181 272 362
C 2.4 0.19 0.38 0.94 1.9 2.8 3.8 7.6 11.3 15 19 23 26 30 34 38 76 113 151 189 283 378
T 2.5 0.20 0.39 0.98 2.0 3.0 3.9 7.9 12 16 20 24 28 31 35 39 79 118 157 197 295 394
O 2.6 0.20 0.41 1.0 2.0 3.1 4.1 8.2 12 16 20 25 29 33 37 41 82 123 164 205 307 409
R 2.7 0.21 0.43 1.1 2.1 3.2 4.3 8.5 13 17 21 26 30 34 38 43 85 128 170 213 319 425
2.8 0.22 0.44 1.1 2.2 3.3 4.4 8.8 13 18 22 26 31 35 40 44 88 132 176 220 331 441
A 2.9 0.23 0.46 1.1 2.3 3.4 4.6 9.1 14 18 23 27 32 37 41 46 91 137 183 228 343 457
3 0.24 0.47 1.2 2.4 3.5 4.7 9.4 14 19 24 28 33 38 43 47 94 142 189 236 354 472
3.1 0.24 0.49 1.2 2.4 3.7 4.9 9.8 15 20 24 29 34 39 44 49 98 146 195 244 366 488
3.2 0.25 0.50 1.3 2.5 3.8 5.0 10.1 15 20 25 30 35 40 45 50 101 151 202 252 378 504
3.3 0.26 0.52 1.3 2.6 3.9 5.2 10.4 16 21 26 31 36 42 47 52 104 156 208 260 390 520
3.4 0.27 0.54 1.3 2.7 4.0 5.4 10.7 16 21 27 32 37 43 48 54 107 161 214 268 402 5353.5 0.28 0.55 1.4 2.8 4.1 5.5 11.0 17 22 28 33 39 44 50 55 110 165 220 276 413 551
3.6 0.28 0.57 1.4 2.8 4.3 5.7 11.3 17 23 28 34 40 45 51 57 113 170 227 283 425 567
3.7 0.29 0.58 1.5 2.9 4.4 5.8 11.7 17 23 29 35 41 47 52 58 117 175 233 291 437 583
3.9 0.31 0.61 1.5 3.1 4.6 6.1 12 18 25 31 37 43 49 55 61 123 184 246 307 461 614
4.4 0.35 0.69 1.7 3.5 5.2 6.9 14 21 28 35 42 49 55 62 69 139 208 277 346 520
4.5 0.35 0.71 1.8 3.5 5.3 7.1 14 21 28 35 43 50 57 64 71 142 213 283 354 531
4.6 0.36 0.72 1.8 3.6 5.4 7.2 14 22 29 36 43 51 58 65 72 145 217 290 362 543
4.7 0.37 0.74 1.9 3.7 5.6 7.4 15 22 30 37 44 52 59 67 74 148 222 296 370 555
4.8 0.38 0.76 1.9 3.8 5.7 7.6 15 23 30 38 45 53 60 68 76 151 227 302 378 567
4.9 0.39 0.77 1.9 3.9 5.8 7.7 15 23 31 39 46 54 62 69 77 154 231 309 386 579
5 0.39 0.79 2.0 3.9 5.9 7.9 16 24 31 39 47 55 63 71 79 157 236 315 394 591
5.2 0.41 0.82 2.0 4.1 6.1 8.2 16 25 33 41 49 57 66 74 82 164 246 328 409 614
5.3 0.42 0.83 2.1 4.2 6.3 8.3 17 25 33 42 50 58 67 75 83 167 250 334 417
5.4 0.43 0.85 2.1 4.3 6.4 8.5 17 26 34 43 51 60 68 77 85 170 255 340 425
5.5 0.43 0.87 2.2 4.3 6.5 8.7 17 26 35 43 52 61 69 78 87 173 260 346 433
Steam Valve Selectio
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Table 12. Two-way, steam globe valve characteristics.
continued on next page
Steam Valve Selection
Disc
CV Size Body ANSI Connection Two- Flow Metal-to- OS
Rating (in.) Straight Angle Rating NPT Flange position Modulating Characteristic Teflon Composition Metal Number
0.4 1/2 DA 150 X X Modified Linear X V5011G1004
X V5011G1137
0.6 X V5011G1012
X V5011G1145
1.0 X V5011G1020
X V5011G1152
1.6 1/2 DA 150 X X Modified Linear X V5011G1038
X V5011G1160
2.5 X V5011G1046
X V5011G1178
RA X Equal percentage X V5011H1002
X Modified Linear X V5011J1007
3.8 1/2 DA/RAa 125 X X Quick-opening X V5045A1122a
DA/RAa V5045A1189a
4.0 DA 150 X Modified Linear X V5011G1053
X V5011G1186
RA X Equal percentage X V5011H1010
X Modified Linear X V5011J1015
5.4 3/4 DA/RAa 125 X X Quick-opening X V5045A1130a
DA/RAa V5045A1197a
6.3 DA 150 X Modified Linear X V5011G1061
X V5011G1194
RA X Equal percentage X V5011H1028
X Modified Linear X V5011J1023
10.0 1 DA 150 X X Modified Linear X V5011G1079
X V5011G1202
RA X Equal percentage X V5011H1036
X Modified Linear X V5011J1031
10.8 DA/RAa 125 X Quick-opening X V5045A1148a
DA/RAa V5045A1205a
16 1 1/4 DA/RA
a
125 X X Quick-opening X V5045A1155
a
DA/RAa V5045A1213a
DA 150 X Modified Linear X V5011G1087
X V5011G1210
RA X Equal percentage X V5011H1044
X Modified Linear X V5011J1049
25 1 1/2 DA/RAa 125 X Quick-opening X V5045A1163a
DA/RAa V5045A1221a
DA 150 X Modified Linear X V5011G1095
X V5011G1228
40 2 DA/RAa 125 X X Quick-opening X V5045A1171a
DA/RAa V5045A1239a
DA 150 X Modified Linear X V5011G1103
63 2 1/2 DA 125 X Equal percentage X V3351A2008
Linear V3350B2007Equal percentage X V5011A1734
150 X X Modified Linear X V5011G1111
250 X Equal percentage X V3451A2007
Linear V3450B2006
RA 125 X Equal percentage V3351C2004
Linear V3350D2003
250 X Equal percentage V3451C2003
Linear V3450D2002
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Table 12. Two-way, steam globe valve characteristics (continued).
a The V5045 valve requires using the V2045 actuator, which is a floating actuator. So the valve can be used as a direct acting orreverse actingvalve.
Steam Valve Selectio
Disc
Cv Size Body ANSI Connection Two- Flow Metal-to- OSRating (in.) Straight Angle Rating NPT Flange position Modulating Characteristic Teflon Composition Metal Number
100 3 DA 125 X X X Equal percentage X V3351A3006
Linear V3350B3005
Equal percentage X V5011A1767
150 X X Modified Linear X V5011G1129250 X Equal percentage X V3451A3005
Linear V3450B3004
RA 125 Equal percentage V3351C3002
Linear V3350D3001
250 Equal percentage V3451C3001
Linear V3450D3000
160 4 DA 125 X X X Equal percentage X V3351A4004
Linear V3350B4003
Equal percentage X V5011A1858
250 X X V3451A4003
Linear V3450B4002
RA 125 Equal percentage V3351C4000
Linear V3350D4009
Equal percentage X V5011B1013
250 X X V3451C4009
Linear V3450D4008
250 5 DA 125 X X X Equal percentage X V3351A5001
Linear V3350B5000
Equal percentage X V5011A1882
250 X X V3451A5000
Linear V3450B5009
RA 125 Equal percentage V3351C5007
Linear V3350D5006
Equal percentage X V5011B1047
250 X X V3451C5006
Linear V3450D5005
360 6 DA 125 X X Equal percentage X V5011A1916
RA 125 V5011B1070
400 6 DA 125 X X V3351A6009
Linear V3350B6008
250 Equal percentage V3451A6008
Linear V3450B6007
RA 125 Equal percentage V3351C6005
Linear V3350D6004
250 Equal percentage V3451C6004
Linear V3450D6003
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Table 13. Two-way, straight-through steam specialty valve characteristics.
a Valve operation is dependent on actuator used; it can be direct acting or reverse acting.
Table 14. Two-way, steam ball valve characteristics.
NOTE: All models have NPT connections, 600 psi body rating, and equal percentage flow characteristic.
Steam Valve Selection
Connection Flow
CvRating Size (in.) Action ANSI Rating NPT Flange Valve Type Characteristic OS Number
13 1 DA 125 X Double Seated Equal percentage V5047A1005
20 1 1/4 V5047A1013
30 1 1/2 V5047A1021
50 2 V5047A1039
75 2 1/2 DA 125 X Single Seated Modified Linear V5051A1008116 3 Cage V5051A1016
178 4 V5051A1024
318 5 V5051A1032
390 6 V5051A1040
n/a 1 1/2 DA/RAa n/a X Butterfly n/a V51B1007
2 V51B1023
2 1/2 V51B1221
3 V51B1239
4 V51B1247
Actuator
CvRating Size (in.) Reduced Full Spring Return Non-Spring Return OS Number
1 1/2 X X VB30A1005
X VB30A1161
2 X VB30A1013
X VB30A1179
4 X VB30A1021
X VB30A1187
15 1/2 X X VB30A1039
X VB30A1195
30 3/4 X X VB30A1047
X VB30A1203
43 1 X X X VB30A1062
48 1 1/4 VB30A1088
X VB30A1278
51 3/4 X VB30A1054
X X VB30A1211
68 1 X VB30A1070
VB30A1260
84 1 1/2 X X X VB30A1104
X VB30A1286
108 2 VB30A1120
125 1 1/4 X X VB30A1096
177 1 1/2 VB30A1112
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Table 15. Two-way, steam valve (with integral pneumatic actuator) characteristics.
continued on next pag
Steam Valve Selectio
Spring Closeoff Max. Medium
Cv Range (psi) at Main Size Body ANSI Connection Temperature Flow
Rating (psi) Rating Pressure (in.) Straight Angle Rating NPT Sweat (F) Characteristic OS Number
0.63 3-8 115 10 1/2 DA 150 X Equal percentage VP512A1205
3-10 85 13 180 Modified Linear VP525A1408
240 VP525C1008
1 3-8 115 10 Equal percentage VP512A1213
1.6 2-5 15 8 1/2 DA 250 X 180 Modified Equal VP531A1004
5/8 O.D. X Percentage VP531A1087
3-8 115 10 1/2 150 X Equal percentage VP512A1221
3-10 15 13 250 180 Modified Equal VP531A1012
240 Percentage VP531C1000
5/8 O.D. X 180 VP531A1095
240 VP531C1034
2 2-5 30 13 1/2 DA 150 X 180 Modified Linear VP525A1416
3-10 VP525A1077
240 VP525C1016
DA 180 VP525A1085
3/4 240 VP525C1040
2.3 2-5 15 8 1/2 DA 250 180 Modified Equal VP531A1020
3-10 13 Percentage VP531A1038
2.5 3-8 115 13 1/2 DA 150 X Equal percentage VP512A1643
2.6 2-5 15 8 3/4 250 180 Modified Equal VP531A1046
7/8 O.D. X Percentage VP531A1103
3-10 13 3/4 X VP531A1053
240 VP531C1018
7/8 O.D. X 180 VP531A1111
240 VP531C1042
3 2-5 15 13 1/2 DA a 150 X 180 Modified Linear VP525A1119
DA a VP525A1135
3-10 DA a VP525A1101
DA a VP525A1127
3/4 DA VP525A1150
240 VP525C1024
DA 180 VP525A1168
240 VP525C1057
3.3 2-5 15 8 3/4 DA 250 X 180 Modified Equal VP531A1061
7/8 O.D. X Percentage VP531A1129
3-10 13 3/4 X VP531A1079
240 VP531C1026
7/8 O.D. X 180 VP531A1137
240 VP531C1059
4 3-8 50 10 3/4 DA 150 X Equal percentage VP512A1270
DA VP512A1494VP512A1510
6-11 150 13 DA VP512A1296
5 2-5 12 13 3/4 DA 150 X 180 Modified Linear VP525A1200
DA 240 VP525A1226
3-10 1/2 DA 180 VP525C1032
3/4 VP525A1192
DA VP525A1218
240 VP525C1065
a Integral Seats
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Table 15. Two-way, steam valve (with integral pneumatic actuator) characteristics (continued).
Spring Closeoff Max. Medium
Cv Range (psi) at Main Size Body ANSI Connection Temperature Flow
Rating (psi) Rating Pressure (in.) Straight Angle Rating NPT Sweat (F) Characteristic OS Number
6.3 3-8 82 13 3/4 DA 150 X Equal percentage VP512A1684
DA VP512A1700
10 70 1 DA VP512A1726
DA VP512A1742
16 35 1 1/4 DA VP512A1767
DA VP512A1783
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Default PositionThe default position of the actuator (also referred to as the state ofrest) is what determines whether the valve functions as normallyopen or closed. In its default position, the valve is normally open orclosed, depending on the valve body and the actuator. For example,a direct acting actuator used with a direct acting valve bodyproduces a normally open valve. But, if a reverse acting actuatorwere used with the same valve body, the valve would be normallyclosed. (See Valve Directional Notation for guidelines.)
Converter control valves should be normally closed and outdoor airpreheat valves should be normally open.
Actuator ForceDifferent actuators are capable of providing different amounts offorce with a given valve. The various closeoff ratings are detailed inTables 16 through 19. Once you have selected a valve, proceed withthe following process for selecting an actuator:
1. Find the matching valve size and CVwithin the valve family.2. Follow that row across to either the pneumatic or electric
section.3. Within that section, find the closeoff rating (the numbers in
the table) that is closest to the required closeoff rating.
IMPORTANT
If the application requires a tight closeoff, choose a ratin
that is greater than the required closeoff value.
4. Now, follow the column up to find the appropriate actuatortype (and, if necessary, linkage).
ACTUATOR SELECTION
When selecting an actuator to power the valve, the primary factorsare connectivity, default position, and actuator force. In short, theactuator must be able to connect to the valve (directly or with alinkage) and it must also be able to close the valve with enoughforce to provide closeoff capability.
There are many valve-actuator combinations where the actuator isdescribed as integral (or as a powerhead). Table 15 contains lists ofsteam valves that come with an integral pneumatic actuator. Thesevalves and actuators are designed to be used together and, therefore,are supplied as a unit. No additional pieces are required and there isno actuator selection involved, once a valve is selected.
ConnectivityThere are three primary types of connectivity with valve actuators.The first is integral, which is discussed above. The second, similarto integral, is direct coupled. These types of actuators, such as theMP953 or ML7984, are designed to be used with several differentvalves and require no extra linkage that is not part of the actuator.These are tagged as direct coupledin Tables 16 through 19. The
third type is the foot-mounted. These actuators require an addedlinkage, usually a Q5001. The linkage is mounted to the valve andthen the actuator is mounted to the linkage. One advantage of thisarrangement is that a variety of actuators and linkages can be used,allowing a larger range of closeoff values for a given valve.
Actuator Selectio
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Table 16. Two-way globe valve/actuator compatibility and closeoff ratings.
a When a linkage is required, all 4 in. and larger flange valves require a Q5001D1026.b These actuators come in two models (MLx425A,B). The A model is RA, the B model is DA.c Some models (with 0-10 Vdc signal inputs) can be switched from DA to RA.
Actuator Selection
Two-way Valves and Closeoff Actuators PNEUMATIC
Ratings (psi) for Pneumatic Actuators.Closeoff rating is at main pressure
noted after the spring range or in theMain Pressure line below
SpringRange
(psi)2-7[9]
4-11[13]
8-12[14]
2-7[13]
4-11[17]
8-12[18]
2-7[13]
2-7[13]
4-11[17]
4-11[17]
3-7[0.5]
4-11[0.5]
8-13[0.5]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
4-11[17]
8-13[0.5]
8-13[0.5]
8-13[0.5]
Diaphragm Diameter 5 8 13 7-1/8 5 8 13 7-1/8
Positioner No No No No Yes Yes Yes YesVALVES Actuator Action DA DA DA RA DA DA DA RA
BodyType Size Cv
Two-positionand/or
ModulatingWater
Modu- latingSteam
Flange 2 1/2 63 V3350A V3350B 28 28 28 82 82 28 28 28 82
3 100 V3351A V3351A 19 19 19 55 55 19 19 19 55
4 160 V3450A V3450B 35 35 35 35
5 250 V3451A V3451A 21 21 21 21
6 400 12 12 12 12
Main Pressure (psi) 0.5 0.5 0.5 0.0 0.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Flange 2 1/2 63 V3350C V3350D 6 32 12 12 22 12 12 12 22
3 100 V3351C V3351C 3 20 7 8 17 7 7 7 17
4 160 V3450C V3450D 7 10 10 10
5 250 V3451C V3451C 4 6 6 6
6 400 3 4 4 4
Main Pressure (psi) 9 13 14 13 17 18 13 13 17 17 0.5 0.5 0.5 17 17 17 17 17 17 17 17 17 0.5 0.5 0.5
Flange 2 1/2 63 V5011A1734 10 10 10 30 30
3 100 V5011A1767 7 7 7 19 19
4 160 V5011A,B 13 13
5 250 8 8
6 360 6 6
Screw 0.4 V5011G 120 120 120 120 120 120
0.63 V5011F V5011G 120 120 120 120 120 120
1/2 1 120 120 120 120 120 120
1.6 120 120 120 120 120 120
2.5 120 120 120 120 120 120
4 87 87 87 87 87 87
3/4 6.3 V5011F V5011G 40 40 40 90 135 40 40 40
1 10 30 30 30 63 100 30 30 30
1 1/4 16 18 18 18 34 55 140 18 18 18 140 140 140
1 1/2 25 10 10 10 122 122 122 20 33 90 10 10 10 122 122 122 90 90 90
2 40 6 6 6 55 55 55 10 18 50 6 6 6 55 55 55 50 50 50
2 1/2 63 45 45 45 100 100 5 10 30 45 45 45 100 30 30 30
3 100 25 25 25 70 70 2 5 20 25 25 25 70 20 20 20
Main Pressure (psi) 1 5 2 6 9 13 14 1 1 1 2 2 2 14 14 14
Screw 1/2 2.5 V5011H V5011J 44 44 50 50 50 44 44 44 50 50 50
4 44 44 50 50 50 44 44 44 50 50 50
3/4 6.3 25 25 45 45 30 30 30 25 25 25 45 45 45 30 30 30
1 10 25 25 45 45 30 30 30 25 25 25 45 45 45 30 30 30
1 1/4 16 15 15 27 27 17 17 17 15 15 15 27 27 27 17 17 17
MP953C1000
MP953C1026
MP953C1018
MP953C1067
MP953C1083
MP953C1075
MP953C1471
MP953C1554
MP953C1489
MP953C1562
MP953D1172
MP953D1131
MP953D1107
MP953E1301
MP953E1319
MP953E1327
MP953E1368
MP953E1376
MP953E1384
MP953E1400
MP953E1418
MP953E1443
MP953F1093
MP953F1101
MP953F1119
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Actuator Selectio
Q5001D1000
Q5001D1000
Q5001D1000
Q5001D1026
none
none
none
Q5001D1000
none
Q5001D1000
Q5001D1000
Q5001D1000
Q5001D1000
Q5001D1000
Q5001D1018
Q5001D1018
none
none
none
Q5001D1000
Q5001D1000
Q5001D1000
Q5001D1000
none
M4185
M8185
M6184
M6194
ML684
ML6421A
ML6421B
M6285
ML6425
M7164
M7284
M7364
M9164
M9184
M7294
M9194
ML7984
ML7421A
ML7421B
M7185
M7285
M9185
M9186
ML7425
ELECTRONIC / ELECTRIC
Linkagea
Control: 2-pos Floating Proportional
Spring-Return Yes No Yes No YesActuator Action DA/ RA DA/ RA n/a DA/ RA b DA/ RA DA c DA/ RA b
ModelNumber
28 28 28 63 28 21 13 28 13 13 28 55 55 63 28 28 28 28 21
20 20 20 45 20 14 9 20 9 9 20 40 40 45 20 20 20 20 14
10 21 25 10 10 21 21 25
6 13 16 6 6 13 13 16
5 9 11 5 5 9 9 11
28 28 28 63 28 21 13 28 13 13 28 55 55 63 28 28 28 28 21
20 20 20 45 20 14 9 20 9 9 20 40 40 45 20 20 20 20 14
10 21 25 10 10 21 21 25
6 13 16 6 6 13 13 16
5 9 11 5 5 9 9 11
26 26 26 77 26 28 10 26 10 10 26 78 78 77 26 26 26 10 28
20 20 20 53 20 16 7 20 7 7 20 37 37 53 20 20 20 7 16
10 19 29 10 10 19 19 29
6 11 18 6 6 11 11 18
4 5 12 4 4 5 5 12
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 122 150 122 122 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 106 150 106 106 150 200 200 150 150 150 150 150 150 150
141 141 141 145 150 141 145 60 141 60 60 141 200 200 145 150 141 141 141 141 145
91 91 91 91 150 91 86 39 91 39 39 91 170 170 91 150 91 91 91 91 86
55 55 55 47 150 55 49 22 55 22 22 55 91 91 47 150 55 55 55 55 49
32 32 32 32 100 32 28 12 32 12 32 32 67 67 32 100 32 32 32 32 28
20 20 20 19 61 20 16 8 20 8 20 20 38 38 19 61 20 20 20 20 16
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 150 150 150 150 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 122 150 122 122 150 200 200 150 150 150 150 150 150 150
150 150 150 150 150 150 150 106 150 106 106 150 200 200 150 150 150 150 150 150 150
141 141 141 145 150 141 145 60 141 60 60 141 200 200 145 150 141 141 141 141 145
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Table 17. Three-way globe valve/actuator compatibility and closeoff ratings.
a When a linkage is required, all 4 in. and larger flange valves require a Q50