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EZH and EZHSO SeriesBulletin 71.2D103081X012
November 2019
EZH and EZHSO Series Pressure Reducing Regulators
Figure 1. Type EZH Pressure Reducing Regulator
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EZH and EZHSO Series
SpecificationsThe Specifications section lists the specifications for the EZH and EZHSO Series pressure reducing regulators. Factory specification is stamped on the nameplate fastened on the regulator at the factory.
Available Configurations Type EZH: Spring-to-close pilot-operated pressure
reducing regulator for low to high outlet pressure Type EZHSO: Spring-to-open pilot-operated
pressure reducing regulator for low to high outlet pressure
Type EZHOSX: Type EZH with a Type OS2 slam-shut device for overpressure (OPSO) or overpressure and underpressure (OPSO/UPSO) protection
Type EZHSO-OSX: Type EZHSO with a Type OS2 slam-shut device for overpressure (OPSO) or overpressure and underpressure (OPSO/UPSO) protection
Body Sizes, End Connection Styles and Pressure Ratings(1)
See Table 1Maximum Allowable Pressures(1)
Inlet Pressure: 1500 psig / 103 bar Outlet (Casing) Pressure: 1500 psig / 103 bar Emergency Casing Pressure: 1500 psig / 103 barMaximum Operating Differential Pressures(1)(3)
Main Valve: 1500 psid / 103 bar d Pilot: Between loading pressure in pilot and loading sense pressure: 1233 psid / 85.0 bar dMinimum Differential Pressures(1)
See Table 3Outlet Pressure Ranges See Table 2Flow and Sizing Coefficients See Tables 7 through 16Flow Capacities See Tables 17 and 18Pilot and Filter Regulator Flow Coefficients Type PRX Pilot: Cg: 10.5; Cv: 0.36; C1: 29 Type SA/2 Filter Regulator: Cg: 4.9Pressure Registration ExternalPilot Connections 1/4 NPT
Process Temperature Capabilities(1)
Nitrile (NBR) Version: -20 to 180ºF / -29 to 82ºC Fluorocarbon (FKM) Version: 0 to 180ºF / -18 to 82ºC(2)
Polyurethane (PU) Version: NPS 1, 2, 6, 8, 12 X 6 / DN 25, 50,
150, 200, 300 X 150 Sizes: -22 to 180ºF / -30 to 82ºC NPS 3 to 4 / DN 80 to 100 Sizes: -4 to 180ºF / -20 to 82ºC
Options • Travel Indicator • Whisper Trim™ Cage • Relief Size-reduction TrimConstruction Materials Main Valve Main Valve Body: Types EZH and EZHSO: WCC Steel Types EZHOSX and EZHSO-OSX: LCC Steel Intermediate Flange and Actuator Casings: Steel, ASTM A350 LF2 Diaphragm Plates: Steel, ASTM A105 Diaphragm: Nitrile (NBR) with PVC coating O-ring: Fluorocarbon (FKM) Disk: Nitrile (NBR), Fluorocarbon (FKM) or Polyurethane (PU) PRX Series Pilots Body: Steel, ASTM 105 Trim: Stainless steel Elastomers: Nitrile (NBR) or Fluorocarbon (FKM) Disk: Polyurethane (PU) or Fluorocarbon (FKM) Type SA/2 Pilot Supply Filter Regulator Body: Steel Diaphragm: Nitrile (NBR) with PVC coating O-ring/Disk: Nitrile (NBR) or Fluorocarbon (FKM) Type OS2 Slam-Shut Device Mechanism Box: Aluminum alloy First and Second Stage Mechanism: WCC Steel Diaphragm: Nitrile (NBR) Bellows: 316 Stainless steelApproximate Weights See Table 20
1. The pressure/temperature limits in this Bulletin and any applicable standard or code limitation should not be exceeded.2. Types PRX and SA/2 Fluorocarbon (FKM) elastomer is limited to 0°F / -18°C.3. Maximum Operating Differential Pressure is 1400 psid / 96.5 bar d for NPS 1 / DN 25 Type EZHSO.
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Features • No Gas Emissions—Eliminates nuisance and
wasteful bleed gas to atmosphere by utilizing a self-contained control system, which bleeds 100% of the gas to the downstream system.
• Bubble-Tight Shutoff—A knife-edged metal plug and soft seat provide bubble tight shutoff for use in applications where positive shutoff is required such as dead-end systems.
• Long Life in Severe Service Applications—The metal plug design deflects particles and debris away from the soft-seat, which gives excellent particle erosion resistance, prolonging service life.
• Failure Mode Options—The Type EZHSO Spring-to-Open design can be utilized to maximize uptime while the Type EZH spring-to-close design can be utilized to protect downstream assets. For many customers, combining the two technologies with a Type EZHSO worker and Type EZH monitor incorporates the best of both worlds.
• Precise Pressure Control—Provides stable and accurate downstream pressure control regardless of inlet pressure variations or demand changes.
• Quiet Operation—The Whisper Trim™ Cage option reduces noise by up to 8 dBa at the source, eliminating the need for expensive path treatments such as insulation, buried valves and enclosures which only mask noise.
• Full Pressure Rating—The equal inlet and outlet pressure rating of 1500 psig / 103 bar, which allows easier selection and requires no special startup or shutdown procedures.
• Integral Slam Shut Configurations—Types EZHOSX and EZHSO-OSX interrupt gas service during an overpressure or underpressure condition.
• Easy In-Line Maintenance—Top entry design enables easier maintenance. Trim parts can be inspected, cleaned and replaced without removing the body from the pipeline. In addition, the NPS 4 / DN 100 and larger sizes are designed for craneless disk maintenance, utilizing an innovative trim removal design.
• High Turn Down Capability—The oversized diaphragm and unique piloting system allow for high turn down, which will provide superior pressure control in systems with large variations in downstream flow demand.
• Travel Indicator—Simplifies in-service inspection and system troubleshooting.
• Main Diaphragm—The main diaphragm is Nitrile (NBR) reinforced with fabric and coated with PVC, which protects and extends the service life in applications with aromatic hydrocarbons.
• Common Body Platform—The EZH and EZHSO Series use the same standard Fisher™ E-Body which is also used in the Types EZR and EZL pressure reducing regulators and Types EZ, ES, ED and ET pressure reducing control valves. This allows easy conversion from one product to another without the need to remove the E-Body from the pipeline.
• Full Usable Capacity—Fisher brand regulators are laboratory tested. 100% of the published flow capacity can be used with confidence.
• Disk Design—The EZH and EZHSO Series offer disks for the main body made from Nitrile (NBR), Fluorocarbon (FKM) and Polyurethane (PU). Polyurethane (PU) provides better abrasion resistance properties and a high durometer rating to extend the working life of the disk in difficult applications such as high pressure drop and low flow.
IntroductionTypes EZH (Spring-to-Close version) and EZHSO (Spring-to-Open version) regulators are accurate pilot-operated, pressure-balanced, soft-seated regulators. They are designed for use in high pressure natural gas transmission, city gate stations, large capacity distribution systems and power plant feeds. They provide smooth and reliable operation, tight shutoff and long life.
For underpressure or overpressure protection, the Types EZHOSX and EZHSO-OSX are available with an integral slam-shut device to completely shut off the flow of gas to the downstream system.
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Table 1. Main Valve Body Sizes, End Connection Styles and Body Ratings
MAIN VALVE BODY SIZEMAIN VALVE BODY MATERIAL END CONNECTION STYLE
STRUCTURAL DESIGN RATINGNPS DN psig bar
1 and 2 25 and 50
LCC or WCC Steel
NPT or SWE 1500 103
1, 2, 3, 4, 6, 12 X 6 and 8
25, 50, 80, 100, 150, 300 X 150
and 200
CL150 RF 290 20.0
CL300 RF 750 51.7
CL600 RF or BWE 1500 103
Table 2. Outlet Pressure Ranges
TYPEOUTLET PRESSURE RANGE AC (ACCURACY CLASS) PILOT CONTROL SPRING INFORMATION
psig bar EZH Series EZHSO Series Spring Color Part NumberWire Diameter Free Length
In. cm In. cm
PRX/120PRX/125PRX/131
14.5 to 2623 to 4441 to 8073 to 123
1.00 to 1.81.6 to 3.02.8 to 5.55.0 to 8.5
2.5% 2.5%
YellowGreenBlueBlack
M0255240X12M0255230X12M0255180X12M0255220X12
0.1100.1260.1380.157
0.280.320.350.40
2.16 5.49
116 to 210203 to 334319 to 435
8.0 to 14.514.0 to 23.022.0 to 30.0
1% 2.5%SilverGold
Aluminum
M0255210X12M0255200X12M0255860X12
0.1770.1970.236
0.450.500.60
2.162.002.00
5.495.105.10
PRX/120-APPRX/125-APPRX/131-AP
435 to 1160 30.0 to 80.0 1% 2.5% Clear M0273790X12 0.335 0.85 3.93 10.0
Table 3. Minimum Differential Pressures
TYPE
MAIN VALVE BODY SIZE MINIMUM DIFFERENTIAL
NPS DNFor 90% Capacity For 100% Capacity
psid bar d psid bar d
EZH
1 25 15.2 1.1 15.7 1.1
2 50 12.0 0.83 13.8 0.95
3 80 10.6 0.73 12.8 0.88
4 100 15.8 1.1 16.4 1.1
6, 8 and 12 X 6 150, 200 and 300 X 600 - - - - - - - - 14.0 0.98
EZHSO
1 25 55 3.8 55 3.8
2 50 55 3.8 55 3.8
3 80 55 3.8 55 3.8
4 100 - - - - - - - - 25.6 1.8
6, 8 and 12 X 6 150, 200 and 300 X 600 - - - - - - - - 14.0 0.98
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Pilot DescriptionsThe EZH and EZHSO Series pressure reducing regulators include a PRX Series pilot mounted on the main valve.
Type PRX/120: Outlet pressure range of 14.5 to 435 psig / 1.00 to 30.0 bar. The Type PRX/120 can be used as the pilot on single stage pressure reducing regulators, as the monitor or working pilot in wide-open monitor systems or as the working pilots in working monitor systems.
Type PRX/120-AP: Outlet pressure range of 435 to 1160 psig / 30.0 to 80.0 bar. The Type PRX/120-AP can be used as the pilot on single stage pressure reducing regulators, as the monitor or working pilot in wide-open monitor systems or as the working pilots in working monitor systems.
Type PRX/125: Identical to the Type PRX/120 except the restriction screw is removed. The Type PRX/125 can only be used as the monitor override pilot on working monitor applications.
Type PRX/125-AP: Identical to the Type PRX/120-AP except the restriction screw is removed. The Type PRX/125-AP can only be used as the monitor override pilot on working monitor applications.
Type PRX/131: Set pressure range of 14.5 to 435 psig / 1.00 to 30.0 bar. The Type PRX/131 is used as a booster or quick dump pilot to increase main valve closing speed with another PRX Series pilot on a single stage pressure reducing regulator or with the monitor pilot on the monitor regulator in wide-open monitor systems.
Pilot Supply Filter RegulatorThe Type SA/2 pilot supply filter regulator provides a constant supply pressure to the PRX Series pilot that is approximately 45 psig / 3.1 bar over set pressure. The Type SA/2 has an integral 5-micron filter.
Principle of OperationEZH Series - Spring-To-Close Version The pilot-operated EZH Series (Spring-to-Close Version) will fail in close position in the case of main valve diaphragm failure or lack of supply pressure to the pilot (see Table 4 for the Failure Mode Analysis).
EZH Series (Figure 2) uses inlet pressure which is reduced through pilot operation to load the regulator actuator diaphragm (lower chamber). Outlet pressure is supplied to the regulator actuator diaphragm (upper chamber). This pressure assists the main
spring that tends to close the regulator, and opposes loading pressure in the actuator. Outlet pressure also opposes the pilot control spring.
PRX Series pilot is supplied with pressure coming from pre-regulator Type SA/2, which reduces inlet pressure to the value of outlet pressure plus approximately 45 psi / 3.1 bar.
When outlet pressure drops below the setting of the pilot control spring, pilot control spring force on the pilot lower diaphragm opens the pilot valve disk, providing additional loading pressure to the lower chamber of the regulator actuator diaphragm. This diaphragm loading pressure opens the main valve disk, supplying the required flow to the downstream system. Any excess loading pressure in the lower chamber of the actuator diaphragm and pilot escapes downstream through the bleed restriction in the pilot.
When the gas demand in the downstream system has been satisfied, the outlet pressure increases. When outlet pressure increases over the setting of the pilot spring, the pilot valve disk will be closed, reducing loading pressure to the lower chamber of the regulator actuator diaphragm; the pressure in the upper case and the main spring will force the regulator to close. The excess loading pressure acting under the regulator actuator diaphragm and pilot bleeds to the downstream system through a bleed restriction in the pilot.
A check valve, set at 75 psi / 5.2 bar, is installed between outlet pressure and loading pressure impulse lines on the NPS 4 / DN 100 and larger sizes; this valve is designed to protect the main valve diaphragm assembly from excessive differential pressure during startup if incorrect start up procedures are used. Do not exceed 75 psi / 5.2 bar differential pressure between the outlet pressure and loading pressure impulse lines.
EZHSO Series - Spring-To-Open VersionThe pilot-operated EZHSO Series (Spring-to-Open Version) will fail in open position in the case of main valve diaphragm failure or lack of supply pressure to the pilot (see Table 4 for the Failure Mode Analysis).
EZHSO Series (Figure 3) uses inlet pressure, which is reduced through pilot operation to load the regulator actuator diaphragm (lower chamber). Pilot supply pressure is provided to the regulator actuator diaphragm (upper chamber). This pressure on the upper chamber of the regulator actuator diaphragm opposes the main spring force that tends to open the regulator. Outlet pressure opposes the pilot control spring.
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PILOT CONTROL SPRING
PILOT UPPER DIAPHRAGM
PILOT DISK
PILOT BLEED RESTRICTION
PILOT LOWER DIAPHRAGM
REGULATOR ACTUATOR
DIAPHRAGM
8 TO 10PIPE
DIAMETERSMAIN VALVE DISK (PLUG)
INLET PRESSURELOADING PRESSUREPILOT SUPPLY PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE
TYPE PRX:S - BLEED PORTB - SUPPLY PORTL - LOADING PORTA - SENSING PORT
TYPE SA/2:V - SENSING PORTR - PILOT SUPPLY PORTM - INLET PORT
TYPE EZH
Figure 2. Type EZH (Spring-to-Close Version) Operational Schematic
TYPE PRX
TYPE SA/2
FILTERPILOT BLEED RESTRICTION
PILOT DISK
PILOT LOWER DIAPHRAGM
TYPE PRX
TYPE SA/2 REGULATOR ACTUATOR DIAPHRAGM
8 TO 10PIPE
DIAMETERS
TYPE EZHSOMAIN VALVE DISK (PLUG)
INLET PRESSURELOADING PRESSUREPILOT SUPPLY PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE
TYPE PRX:S - BLEED PORTB - SUPPLY PORTL - LOADING PORTA - SENSING PORT
TYPE SA/2:V - SENSING PORTR - PILOT SUPPLY PORTM - INLET PORT
Figure 3. Type EZHSO (Spring-to-Open Version) Operational Schematic
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PRX Series pilot is supplied with pressure coming from pre-regulator Type SA/2, which reduces inlet pressure to the value of outlet pressure plus approximately 45 psi / 3.1 bar.
When outlet pressure drops below the setting of the pilot control spring, pilot control spring force on the pilot diaphragm opens the pilot valve disk, providing additional loading pressure to the lower chamber of the regulator actuator diaphragm. This diaphragm loading pressure opens the main valve disk, supplying the required flow to the downstream system. Any excess loading pressure in the lower chamber of the regulator actuator diaphragm and pilot escapes downstream through the bleed restriction in the pilot.
When the gas demand in the downstream system has been satisfied, the outlet pressure increases. When outlet pressure increases over the setting of the pilot spring, the pilot valve disk will be closed, reducing loading pressure to the lower chamber of the regulator actuator diaphragm; the pressure in the upper chamber will force the regulator to close. The excess loading pressure acting under the regulator actuator diaphragm and pilot bleeds to the downstream system through a bleed restriction in the pilot.
A check valve, set at 75 psi / 5.2 bar, is installed between inlet pressure to upper actuator casing and loading pressure impulse lines on the NPS 4 / DN 100 and larger sizes; this valve is designed to protect the main valve diaphragm assembly from excessive differential pressure during incorrect start-up procedures.
Monitoring Systems Monitoring regulation is overpressure protection by containment, therefore, there is no relief valve to vent to the atmosphere. When the working regulator fails to control the pressure, a monitor regulator installed in series, sensing the downstream pressure, goes into operation to maintain the downstream pressure at a slightly higher value than normal set pressure. During an overpressure situation, monitoring keeps the customer on line. Also, testing is relatively easy. To perform a periodic test on a monitoring regulator, increase the outlet set pressure of the working regulator and watch the outlet pressure gauge to determine if the monitoring regulator takes over at the appropriate outlet pressure.
Wide-Open Monitoring Systems (Figure 4)There are two types of wide-open monitoring systems: upstream and downstream. The difference between upstream and downstream monitoring is that the functions of the regulators are reversed. Systems can be changed from upstream to downstream monitoring and vice-versa, by simply reversing the setpoints of the two regulators. The decision to use either an upstream or downstream monitoring system is largely a matter of personal preference or company policy.
Table 4. Failure Mode Analysis
PART NAME CONDITION CAUSE EFFECTREGULATOR REACTION MODE
Type EZH Type EZHSO
Filter Filter blocked /Clogged
Debris or aromatics present in the gas
Decrease of supply pressure gives decrease of loading pressure Close Open
Pilot disk Pilot cannot be closed
Debris or aromatics present, Sour gas Increase loading pressure Open Open
Pilot lower diaphragm Pilot cannot control Debris or aromatics
present, Sour gas Decrease loading pressure Close Open
Pilot upper diaphragm
Pilot cannot feed the regulator
Debris or aromatics present, Sour gas Decrease loading pressure Close Open
Regulator diaphragm
Not proper performance of
the loading pressure chamber
Debris or aromatics present, Sour gas
Balancing of Pressures and charge or discharge of the loading pressure chamber Close Open
PilotFrozen pilot, Type SA/2 not working
Moisture in the gas, high pressure drop
Type SA/2 loading upper casing of regulator, Pilot not supplying loading
pressure to lower casingClose Close
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In normal operation of a wide-open configuration, the working regulator controls the system’s outlet pressure. With a higher outlet pressure setting, the monitor regulator senses a pressure lower than its setpoint and tries to increase outlet pressure by going wide-open. If the working regulator fails, the monitoring regulator assumes control and holds the outlet pressure at its outlet pressure setting.
Figure 4 shows an upstream wide-open monitor Type EZH (fail-to-close) and a downstream active regulator Type EZHSO (fail-to-open). In this installation, if the Type EZHSO regulator no longer controls downstream pressure, it will remain open, letting the Type EZH monitor regulator take control of the downstream pressure. Should the Type EZH fail, the monitor regulator will close and protect the downstream system from overpressure condition.
Working Monitoring Regulators (Figure 5)In a working monitoring system, the upstream regulator requires two pilots and it is always the monitoring regulator. The additional pilot permits the monitoring regulator to act as a series regulator to control an intermediate pressure during normal operation. In this way, both units are always operating and can be easily checked for proper operation.
In normal operation, the working regulator controls the outlet pressure of the system. The monitoring regulator’s working pilot controls the intermediate pressure and the monitoring pilot senses the system’s outlet pressure. If the working regulator fails, the monitoring pilot will sense the increase in outlet pressure and take control.
Working monitor installations require an EZH or EZHSO Series main valve with a Type PRX/120 or PRX/120-AP working pilot and a Type PRX/125 or PRX/125-AP monitoring pilot for the upstream regulator and an EZH or EZHSO Series with the appropriate Type PRX/120 or PRX/120-AP pilot for the downstream regulator.
Overpressure ProtectionOverpressuring any portion of a regulator or associated equipment may cause personal injury, leakage or property damage due to bursting of pressure-containing parts or explosion of accumulated gas. Provide appropriate pressure relieving or pressure limiting devices to ensure that the limits in the Specifications section are not exceeded. Regulator operation within ratings does not prevent the possibility of damage from external sources or from debris in the pipeline. Common methods of external overpressure protection include relief valves, monitoring regulators, shutoff devices and series regulation.
TYPE PRX
TYPE SA/2
TYPE PRX
TYPE SA/2
TYPE EZH TYPE EZHSO
8 TO 10PIPE
DIAMETERS
INLET PRESSURELOADING PRESSUREINTERMEDIATE PRESSUREPILOT SUPPLY PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE
TYPE PRX:S - BLEED PORTB - SUPPLY PORTL - LOADING PORTA - SENSING PORT
TYPE SA/2:V - SENSING PORTR - PILOT SUPPLY PORTM - INLET PORT
Figure 4. Wide-Open Monitoring System Operational Schematic
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Types EZHOSX (Figure 6) and EZHSO-OSX regulators rely on the integrated slam-shut device for overpressure (OPSO) or overpressure and underpressure (OPSO/UPSO) protection. In the event that outlet pressure rises above or falls below the pressure setting, slam shut will completely shut off the flow of gas to the downstream system.
Noise Abatement TrimWhisper Trim™ cage provides effective attenuation of aerodynamic noise in gas applications involving high pressure drop ratios. Aerodynamic noise is generated by the turbulence created in the flow of gas as the fluid passes through the port. To achieve effective noise attenuation, a Whisper Trim cage utilizes multiple orifices of special shape, size and spacing. These orifices break up turbulent fluid streams, reducing noise-producing interactions.
EZH and EZHSO Series regulators offer an optional Whisper Trim Cage to reduce noise by up to 8 dBA. See Figure 7 for Noise Level Comparisons.
Slam-Shut DevicePrinciple of OperationThe slam-shut device on Types EZHOSX (Figure 6) and EZHSO-OSX can provide either overpressure (OPSO) or overpressure and underpressure (OPSO/UPSO) protection by completely shutting off the flow of gas to the downstream system. Pressure is registered on one side of the diaphragm, piston or bellows and is opposed by the setpoint control spring of the manometric sensing device. The Type OSE slam-shut valve tripping pressure is determined by the setting of the control spring.
TYPE PRX/120TYPE PRX/125 TYPE PRX/120
TYPE SA/2
TYPE EZH TYPE EZH8 TO 10PIPE
DIAMETERS
8 TO 10PIPE
DIAMETERS
INLET PRESSURELOADING PRESSUREINTERMEDIATE PRESSUREPILOT SUPPLY PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE
TYPE PRX:S - BLEED PORTB - SUPPLY PORTL - LOADING PORTA - SENSING PORT
TYPE SA/2:V - SENSING PORTR - PILOT SUPPLY PORTM - INLET PORT
Figure 5. Working Monitoring System Operational Schematic
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Overpressure: when the downstream pressure increases above the setpoint, the pressure on top of the diaphragm overcomes the spring setting and moves the manometric device stem.
Underpressure: when the downstream pressure decreases below the setpoint, the control spring pressure below the diaphragm overcomes the downstream pressure and pushes the diaphragm which moves the manometric device stem.
When the pressure of the downstream line rises above the set pressure (or drops below the set pressure) the manometric device senses the pressure change and triggers the detection stage which activates the second stage, releasing the slam-shut valve plug. Once the slam-shut device has been tripped, it must be manually reset.
See Figures 9 and 10 for the difference between the device in open and closed positions. See Figure 11
for Type EZHOSX Installation Schematics. For more information about the Types EZHOSX and EZHSO-OSX, contact your local Sales Office.
Capacity InformationNote
EZH and EZHSO Series flow capacities are laboratory verified; therefore, they may be sized for 100% flow using published capacities as shown. It is not necessary to reduce published capacities.
Tables 17 and 18 show the natural gas regulating capacities of the EZH and EZHSO Series regulators at selected inlet pressures and outlet pressure settings. Flows are in thousands of SCFH at 60°F and 14.7 psia (or in thousands of Nm³/h at 0°C and 1.01325 bar) of 0.6 specific gravity natural gas.
TYPE PRX
TYPE SA/2
EQUALIZER BYPASS
MANOMETRIC DEVICE STEM
MANOMETRIC DEVICE
8 TO 10PIPE
DIAMETERS
VALVE PLUG
VALVE PLUG DISK
MECHANISM BOX
INLET PRESSURELOADING PRESSURE
PILOT SUPPLY PRESSUREOUTLET PRESSUREATMOSPHERIC PRESSURE
Figure 6. Type EZHOSX Operational Schematic
110
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353,000 / 9400
60
50706,000 / 18,900
1,060,000 / 28,400
1,400,000 / 37,500
1,760,000 / 47,100
2,100,000 /56,800
2,470,000 / 66,200
2,800,000 / 75,700
3,178,000 / 85,100
0
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EZH and EZHSO SeriesN
OIS
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VEL
(dB
A)
FLOW RATE, SCFH / Nm3/h
Figure 7. Noise Comparison Diagram
EZH AND EZHSO SERIES WITH STANDARD CAGE
EZH AND EZHSO SERIES WITH WHISPER TRIM™ CAGE
BM1
TYPE BMS1
MECHANISM BOX (BM1) WITH 1 MANOMETRIC SENSING DEVICE (TYPE BMS1)
Figure 8. Types of Slam-Shut Installation
BM2
TYPE BMS2(LEFT SIDE)
TYPE BMS1 (RIGHT SIDE)
MECHANISM BOX (BM2) WITH 2 MANOMETRIC SENSING DEVICES (TYPES BMS1 AND BMS2)
Q = 520
GTCgP1SIN
3417
C1
∆PP1
DEG
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To determine equivalent capacities for air, propane, butane or nitrogen, multiply the capacity by the following appropriate conversion factor: 0.775 for air, 0.628 for propane, 0.548 for butane or 0.789 for nitrogen. For gases of other specific gravities, multiply the given capacity by 0.775 and divide by the square root of the appropriate specific gravity. Then, if capacity is desired in Nm³/h at 0°C and 1.01325 bar, multiply SCFH by 0.0268.
To find approximate regulating capacities at pressure settings not given in Tables 17 and 18 or to find wide-open flow capacities for relief sizing at any inlet pressure, perform one of the following procedures. Then convert using the factors provided above, if necessary.
Critical Pressure DropsFor critical pressure drops (absolute outlet pressure equal to or less than one-half of absolute inlet pressure), use the following formula:
Q = (P1)(Cg)(1.29)
Non-Critical Pressure DropsFor pressure drops lower than critical (absolute outlet pressure greater than one-half of absolute inlet pressure).
where, Q = gas flow rate, SCFH P1 = absolute inlet pressure, psia (P1 gauge + 14.7) Cg = regulating or wide-open gas sizing coefficient G = gas specific gravity of the gas T = absolute temperature of gas at inlet, °Rankine C1 = flow coefficient ∆P = pressure drop across the regulator, psi
FIRST-STAGE RESET PIN (WHITE)
MECHANISM BOX
SECOND-STAGERESET SHAFT
SETPOINT ADJUSTMENT RING
TRAVEL STOP
Figure 10. Slam-Shut Device in Closed PositionFigure 9. Slam-Shut Device in Open Position
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PILOT
PILOT SUPPLY FILTER
BLOCK VALVE
SLAM-SHUT DEVICECONTROL LINE ALTERNATE CONTROL LINE
HAND VALVE
HAND VALVE
BLOCK VALVE
CONTROL LINE
11A—Overpressure and Underpressure Shutoff Using One Manometric Device (This Application May Require Two Manometric Devices as Shown in Figure 11C)
PILOT SUPPLY FILTER
BLOCK VALVE
SENSE LINE
SLAM-SHUT DEVICECONTROL LINE ALTERNATE CONTROL LINE
HAND VALVE
HAND VALVE
BLOCK VALVE
CONTROL LINE
PILOT
11B—Minimum and Maximum Upstream and Downstream Pressure
PILOT SUPPLY FILTER
BLOCK VALVE
SLAM-SHUT DEVICE
CONTROL LINE
CONTROL LINE
BLOCK VALVE
HAND VALVE
HAND VALVE
HAND VALVE
ALTERNATE CONTROL LINE
11C—Overpressure and Underpressure Shutoff Using Separate Manometric Devices
Figure 11. Type EZHOSX Installation Schematics
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PILOT
PILOT SUPPLY FILTER
BLOCK VALVE
SLAM-SHUT DEVICE
EXTERNAL TRIP PRESSURE CONTROL LINE
HAND VALVE
HAND VALVE
BLOCK VALVE
CONTROL LINE
11D—External Signal
PILOT
PILOT SUPPLY FILTER
BLOCK VALVE
SLAM-SHUT DEVICECONTROL LINE ALTERNATE CONTROL LINE
HAND VALVE
HAND VALVE
BLOCK VALVE
HAND VALVE CONTROL LINE
PILOT
11E—Wide-Open Monitoring System with Slam-Shut Device for Overpressure and Underpressure Shutoff Using One Manometric Device (This Application May Require Two Manometric Devices as Shown in Figure 11F)
WORKING PILOTMONITOR PILOT
PILOT SUPPLY FILTER
PILOT SUPPLY FILTER
BLOCK VALVE
SLAM-SHUT DEVICE
CONTROL LINEALTERNATE CONTROL LINE
HAND VALVE
HAND VALVE
HAND VALVE
BLOCK VALVE
CONTROL LINE
PILOT
11F—Working Monitoring System with Slam-Shut Device for Overpressure and Underpressure Shutoff Using Two Manometric Devices (This Application May Only Require One Manometric Device as Shown in Figure 11E)
Figure 11. Type EZHOSX Installation Schematics (continued)
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Table 5. Manometric Device Specifications(1)
SPRING RANGE SPRING COLOR
SPRING PART
NUMBER
MAXIMUM SENSING
INLET PRESSURE
MANOMETRIC SENSING
DEVICE TYPE
MANOMETRIC SENSING
DEVICE STYLE
SETPOINT TOLERANCE(1)
MAXIMUM DIFFERENCE
BETWEEN OVERPRESSURE
AND UNDERPRESSURE(2)
psig bar psig bar psig bar psid bar d
4.02 to 14.1 in. w.c.
10 to 35 mbar Purple T14232T0012
75 5.2 162
Diaphragm
0.058 0.004 0.145 0.01
9.97 to 33.2 in. w.c.
25 to 83 mbar Orange T14233T0012 0.073 0.005 0.363 0.03
18 in. w.c. to 2.0 psig
45 mbar to 0.14 bar Red T14234T0012 0.145 0.01 0.725 0.05
1.0 to 3.5 0.07 to 0.24 Yellow T14235T0012 0.203 0.014 0.870 0.06
1.7 to 5.6 0.12 to 0.39 Green T14236T0012 0.261 0.02 2.18 0.15
2 to 11 0.14 to 0.80 Gray T14238T0012 0.725 0.05 5.08 0.35
4 to 19 0.28 to 1.3 Brown T14239T0012 1.16 0.08 8.70 0.60
7 to 33 0.48 to 2.3 Black T14240T0012 2.47 0.17 16.0 1.1
15 to 75 1.0 to 5.2 Blue T14237T0012
235 16.2 71
5.08 0.35 36.3 2.5
31 to 161 2.1 to 11.1 Brown T14239T0012 10.2 0.70 79.8 5.5
59 to 235 4.1 to 16.2 Black T14240T0012 23.2 1.6 145 10.0
235 to 323 16.2 to 22.3 Brown T14239T00121470 101 27
Piston
43.5 3.0Requires use of
Types BMS1 and BMS2
323 to 588 22.3 to 40.5 Black T14240T0012 94.3 6.5
588 to 808 40.5 to 55.7 Brown T14239T00121470 101 17
102 7.0
808 to 1470 55.7 to 101 Black T14240T0012 174 12.0
81 to 323 5.58 to 22.3 Brown T14239T0012514 35.4 236
Bellows
14.5 1.00 145 10.0
122 to 514 8.4 to 35.4 Black T14240T0012 36.3 2.5 290 20.0
257 to 1058 17.7 to 72.9 Gray T14238T0012 1058 72.9 315 72.5 5.0 479 33.0
1. Minimum suggested difference between slam-shut set pressure and normal operating pressure of the system.2. Maximum difference between overpressure and underpressure when using one manometric device (Type BMS1) with tripping hook. For underpressure and overpressure points greater
than this maximum number, use a second manometric device (Type BMS2) for underpressure protection.
Table 6. Applications and Construction Guide (See Figure 8)
APPLICATIONMECHANISM BOX REQUIRED MANOMETRIC SENSING DEVICE REQUIRED
BM1 BM2 Type BMS1 Type BMS2
Overpressure Shutoff (OPSO)
Yes NoYes
NoUnderpressure Shutoff (UPSO)
Overpressure Shutoff (OPSO) and Underpressure Shutoff (UPSO) Yes(1)
Overpressure Shutoff (OPSO) and Underpressure Shutoff (UPSO)
No YesYes(2) Yes
Overpressure Shutoff (OPSO), Overpressure Shutoff (OPSO) and Underpressure Shutoff (UPSO) Yes(2) Yes(1)
1. When using one manometric sensing device (Type BMS1) for both overpressure and underpressure shutoff, make sure that the difference between set pressures falls within the maximum range shown in Table 5.
2. When using two manometric sensing devices (Types BMS1 and BMS2), the Type BMS1 can only be used for high trip.
16
EZH and EZHSO Series
Table 7. Types EZH and EZHSO Main Valve with Standard Cage Regulating Flow Coefficients
MAIN VALVEBODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN Cg Cv C1 Cg Cv C1
1 25
100805030
564436284172
16.312.38.45.3
34.635.433.732.5
544423249157
15.310.96.34.0
35.538.739.739.1
2 50
100805030
227817191213707
58.547.131.016.9
38.936.539.141.7
211016091177718
62.950.533.018.8
33.531.935.638.2
3 80
100805030
4960395025501530
13310963.636.7
37.336.240.141.7
4396329420691339
14397.254.739.8
30.833.937.8033.6
4 100
100805030
7250575035102130
22716595.956.7
31.934.836.637.6
7170563034602080
22916595.556.2
31.334.136.237.0
6 150
100805030
14,430 11,270 7150 4100
462344206132
31.232.834.731.1
13,600 11,260 7120 4070
433313181132
31.435.939.330.8
8 2001005030
26,540 13,990 7720
720375202
36.937.338.1
25,27013,6007860
722374205
35.036.438.3
12 X 6 300 X 1501005030
30,490 14,040 8050
815359202
37.439.139.7
29,27013,6207890
783348198
37.439.139.7
Table 8. Types EZH and EZHSO with Standard Cage Wide-Open Flow Coefficients
MAIN VALVE BODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN Cg Cv C1 Cg Cv C1
1 25
100805030
587453295179
16.9512.798.765.51
34.6335.4233.6832.49
566440259163
15.9411.376.524.16
35.5138.7039.7239.18
2 50
100805030
236917881261735
60.8948.9432.2617.62
38.9136.5339.0941.71
219416731224747
65.4452.5234.3519.57
33.5331.8535.6338.17
3 80
100805030
5158410826521591
138113
66.1438.17
37.2936.2440.1041.68
4571342621521393
149101
56.9441.40
30.7733.8937.7933.65
4 100
100805030
7470592036202190
23417098.858.4
31.634.836.737.3
7390580035602140
23617098.457.9
31.434.236.337.3
6 150
100805030
14,87011,61073704230
476354212136
31.232.834.731.1
14,01011,60073404200
446323187136
31.435.939.330.8
8 2001005030
27,34014,4107950
742386209
36.937.338.1
26,04014,0008100
744385212
35.036.338.3
12 X 6 300 X 1501005030
31,400 14,460 8290
839370208
37.439.139.7
30,16014,0308130
806359204
37.439.139.7
17
EZH and EZHSO Series
Table 9. Types EZH and EZHSO Main Valve with Standard Cage IEC Sizing Coefficients
MAIN VALVE BODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN XT FD FL XT FD FL
1 25
100805030
0.610.720.690.66
0.610.670.800.81
0.89
0.800.950.990.97
0.590.630.690.71
0.89
2 50
100805030
0.730.840.970.99
0.590.680.690.70
0.690.720.840.92
0.610.700.720.74
3 80
100805030
0.880.830.990.99
0.580.710.730.72
0.600.730.900.72
0.600.670.680.75
4 100
100805030
0.630.760.850.88
0.630.740.770.78
0.620.740.830.88
0.630.740.770.77
6 150
100805030
0.620.680.760.61
0.690.780.610.95
0.620.820.980.60
0.690.780.610.95
8 2001005030
0.860.880.92
0.690.780.61
0.770.830.93
0.690.780.61
12 X 6 300 X 1501005030
0.880.961.00
0.690.780.61
0.880.961.00
0.690.780.61
Table 10. Types EZHOSX and EZHSO-OSX Main Valve with Standard Cage Regulating Flow Coefficients
MAIN VALVE BODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN Cg Cv C1 Cg Cv C1
1 25
100805030
560428282171
16.312.08.35.3
34.435.733.932.3
550408245154
17.611.97.34.8
31.334.333.632.1
2 50
100805030
225918371297746
53.552.032.917.9
42.335.439.441.7
209217621301746
54.650.033.518.3
38.335.338.8040.80
3 80
100805030
4620392025601540
12510664.936.8
37.037.039.441.8
4359326620521328
14296.454.339.5
30.833.937.8033.6
4 100
100805030
7120592035502080
20916293.356.4
34.136.538.036.9
6920576034202060
21316391.755.6
32.535.337.337.1
6 150
100805030
13,930 11,230 7150 4020
412305185101
33.836.838.739.8
13,280 10,600 7150 4050
405303185102
32.835.038.839.7
18
EZH and EZHSO Series
Table 11. Types EZHOSX and EZHSO-OSX with Standard Cage Wide-Open Flow Coefficients
MAIN VALVE BODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN Cg Cv C1 Cg Cv C1
1 25
100805030
582445293178
16.9512.488.665.51
34.3435.6633.8332.30
572424255160
18.312.387.594.99
31.2634.2533.6032.06
2 50
100805030
234919111348776
55.5954.0434.2118.62
42.2635.3639.4041.68
217618321352775
56.7551.9734.8719.01
38.3435.2538.7740.77
3 80
100805030
4805407726621602
130110
67.5038.27
36.9636.9839.4441.86
4533339721341381
147100
56.4641.05
30.7733.8937.8033.64
4 100
100805030
7330610036602140
21516796.158.1
34.036.538.036.9
7130593035202120
21916894.557.3
32.435.237.437.1
6 150
100805030
14,348 11,567 7365 4141
424314191104
33.836.838.739.8
13,678 10,918 7365 4172
417312191105
32.835.038.839.7
Table 12. Types EZHOSX and EZHSO-OSX Main Valve with Standard Cage IEC Sizing Coefficients
MAIN VALVE BODY SIZE TRIM, % OF
CAPACITYLINE SIZE EQUALS BODY SIZE 2:1 LINE SIZE TO BODY SIZE PIPING
NPS DN XT FD FL XT FD FL
1 25
100805030
0.750.810.730.65
0.610.660.790.81
0.89
0.940.680.260.87
0.610.660.790.81
0.89
2 50
100805030
0.780.790.980.99
0.560.710.710.72
0.860.920.950.99
0.560.710.710.72
3 80
100805030
0.870.870.980.99
0.560.700.740.72
0.590.720.900.71
0.560.700.740.72
4 100
100805030
0.730.840.910.86
0.610.730.760.77
0.660.780.880.87
0.610.730.760.77
6 150
100805030
0.720.860.951.00
0.690.780.610.95
0.680.770.951.00
0.690.780.610.95
19
EZH and EZHSO Series
Table 13. Types EZH and EZHSO Main Valve with Whisper Trim™ Cage Regulating Flow Coefficients and Sizing Coefficients
MAIN VALVEBODY SIZE
TRIM, % OF
CAPACITY
LINE SIZE EQUALS BODY SIZE
2:1 LINE SIZE TO BODY SIZE PIPING
IEC SIZING COEFFICIENTS
1:1 Line to Body Size
2:1 Line to Body Size FL
NPS DN Cg Cv C1 Cg Cv C1 XT FD XT FD
2 50
100805030
162714661114689
42.537.628.016.6
38.339.039.841.6
153913891099695
45.940.730.818.4
33.534.135.737.7
0.820.900.990.99
0.030.030.020.02
0.710.740.810.90
0.030.030.020.02
0.89
3 80
100805030
3502292819341355
10381.449.332.9
34.136.039.241.2
3313277419081366
10882.651.435.0
30.833.637.139.0
0.590.720.950.99
0.020.020.010.01
0.600.710.870.96
0.020.020.010.01
4 100
100805030
5570486033402080
17914893.454.3
31.132.835.838.3
5410473033202050
17814693.055.0
30.432.435.737.3
0.610.670.800.92
0.020.020.010.01
0.590.660.790.88
0.020.020.010.01
6 150
100805030
12,860 10,610 7140 4040
375295191102
34.335.937.439.8
12,410 10,290 7080 4020
373293191102
33.335.137.139.6
0.740.820.881.00
0.010.010.010.01
0.700.780.870.99
0.010.010.010.01
8 2001005030
20,620 13,180 7590
518333193
39.839.639.4
19,570 12,850 7550
598327191
32.839.339.6
1.000.990.98
0.010.010.01
0.680.980.99
0.010.010.01
12 X 6 300 X 1501005030
20,000 13,110 7570
648330190
30.939.839.8
19,200 12,720 7420
622320186
30.939.839.8
0.601.001.00
0.010.010.01
0.601.001.00
0.010.010.01
Table 14. Types EZH and EZHSO Main Valve with Whisper Trim Cage Wide-Open Flow and Sizing Coefficients
MAIN VALVEBODY SIZE
TRIM, % OF
CAPACITY
LINE SIZE EQUALS BODY SIZE
2:1 LINE SIZE TO BODY SIZE PIPING
IEC SIZING COEFFICIENTS
1:1 Line to Body Size
2:1 Line to Body Size FL
NPS DN Cg Cv C1 Cg Cv C1 XT FD XT FD
2 50
100805030
169215241159718
44.239.129.117.2
38.239.039.841.7
160014441143722
47.742.331.919.2
33.534.135.837.6
0.820.900.990.99
0.030.030.020.02
0.710.740.810.90
0.030.030.020.02
0.89
3 80
100805030
3642304520111409
10784.751.334.2
34.135.939.241.2
3445288519851421
11285.853.436.3
30.733.637.139.1
0.590.720.950.99
0.020.020.010.01
0.600.710.870.96
0.020.020.010.01
4 100
100805030
5740501034402140
18415296.255.9
31.032.735.638.1
5570487034202110
18315095.856.7
30.532.435.337.3
0.610.670.800.92
0.020.020.010.01
0.590.660.790.88
0.020.020.010.01
6 150
100805030
13,24010,93073504160
386304197105
34.335.937.439.7
12,79010,60072904140
384302197105
33.335.137.039.5
0.740.820.881.00
0.010.010.010.01
0.700.780.870.99
0.010.010.010.01
8 2001005030
21,23013,5807820
534343198
39.839.639.4
20,16013,2407770
615337196
32.839.339.6
1.000.990.98
0.010.010.01
0.680.980.99
0.010.010.01
12 X 6 300 X 1501005030
20,600 13,500 7800
668340196
30.939.839.8
19,780 13,100 7640
641329192
30.939.839.8
0.601.001.00
0.010.010.01
0.601.001.00
0.010.010.01
20
EZH and EZHSO Series
Table 15. Types EZHOSX and EZHSO-OSX Main Valve with Whisper Trim™ Cage Regulating Flow and Sizing Coefficients
MAIN VALVEBODY SIZE
TRIM, % OF
CAPACITY
LINE SIZE EQUALS BODY SIZE
2:1 LINE SIZE TO BODY SIZE PIPING
IEC SIZING COEFFICIENTS
1:1 Line to Body Size
2:1 Line to Body Size FL
NPS DN Cg Cv C1 Cg Cv C1 XT FD XT FD
2 50
100805030
149414731171721
39.939.330.017.0
37.437.539.042.4
151614821169718
41.039.529.618.2
37.037.539.539.4
0.890.890.960.99
0.030.030.020.02
0.870.890.990.98
0.030.030.020.02
0.89
3 80
100805030
3472290319181344
10280.748.932.6
34.136.039.241.2
3285275118921354
10781.951.034.7
30.833.637.139.0
0.730.820.970.99
0.020.020.010.01
0.590.710.860.96
0.020.020.010.01
4 100
100805030
5490496032702040
16714489.954.4
32.934.436.437.5
5320481031902020
16814187.753.7
31.734.136.437.6
0.680.740.830.89
0.020.020.010.01
0.630.730.860.90
0.020.020.010.01
6 150
100805030
12,240 997069703990
353275181100
34.736.338.639.8
11,840965067803950
34827518099.9
34.035.037.639.6
0.760.830.941.00
0.010.010.010.01
0.730.780.890.99
0.010.010.010.01
Table 16. Types EZHOSX and EZHSO-OSX Main Valve with Whisper Trim Cage Wide-Open Flow and Sizing Coefficients
MAIN VALVEBODY SIZE
TRIM, % OF
CAPACITY
LINE SIZE EQUALS BODY SIZE
2:1 LINE SIZE TO BODY SIZE PIPING
IEC SIZING COEFFICIENTS1:1 Line to Body Size
2:1 Line to Body Size FL
NPS DN Cg Cv C1 Cg Cv C1 XT FD XT FD
2 50
100805030
155415321218750
41.540.931.217.7
37.437.539.042.3
157715421216747
42.641.130.819.0
37.137.539.439.3
0.890.890.960.99
0.030.030.020.02
0.870.890.990.98
0.030.030.020.02
0.89
3 80
100805030
3611302019941397
10684.050.933.9
34.135.939.141.2
3416286119681409
11185.253.036.1
30.733.637.139.0
0.730.820.970.99
0.030.030.020.02
0.590.710.860.96
0.030.030.020.02
4 100
100805030
5650511033702100
17214892.656.0
32.934.236.337.6
5480495032902080
17314589.755.3
31.634.136.837.6
0.680.740.830.89
0.020.020.010.01
0.630.730.860.90
0.020.020.010.01
6 150
100805030
12,61010,27071904120
363283186104
34.736.338.639.8
12,200994069904080
359284186103
34.035.037.639.8
0.760.830.941.00
0.010.010.010.01
0.730.780.890.99
0.010.010.010.01
21
EZH and EZHSO Series
Table 17. Capacities for Types EZH and EZHSO with PRX Series Pilot and Type SA/2 Pilot Supply Filter Regulator
INLET PRESSURE
OUTLET PRESSURE
CAPACITIES IN THOUSANDS OF SCFH / Nm3/h OF 0.6 SPECIFIC GRAVITY NATURAL GAS USING 1:1 LINE SIZE TO BODY SIZE PIPING
NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100 NPS 6 / DN 150 NPS 8 / DN 200 NPS 12 X 6 / DN 300 X 150
psig bar psig bar SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h
30 2.1 15 1.0 27 0.7 112 3.0 229 6.1 365 9.8 745 19.9 1233 33.0 1403 37.6
40 2.8 1525
1.01.7
3731
0.90.8
149128
4.03.4
309260
8.26.9
483420
13.0 11.3
980858
26.223.0
16631403
44.637.6
18961596
50.842.7
50 3.4152535
1.01.72.4
454135
1.21.10.9
183169142
4.94.53.8
382347288
10.29.37.7
588550469
15.8 14.8 12.6
11891118959
31.829.925.7
205618701556
55.150.141.7
234721301768
62.957.147.4
60 4.1
16203045
1.11.32.03.1
53524838
1.41.31.31.0
214211197156
5.75.65.34.2
450440406314
12.011.810.88.4
687678641513
18.4 18.2 17.2 13.8
1384137113021051
37.136.734.928.2
2420236821861695
64.863.558.645.4
2765270324901926
74.172.466.751.6
75 5.2
22304060
1.52.02.74.1
63615842
1.71.61.51.1
257250235174
6.96.76.34.6
541520483349
14.513.912.99.3
825806764574
22.1 21.6 20.5 15.4
1662163215531177
44.543.741.631.5
2908279826011886
77.975.069.750.5
3322319229632142
89.085.579.457.4
100 6.9
32405085
2.22.73.45.8
81797649
2.22.12.01.3
329322309200
8.88.68.35.3
692672639401
18.518.017.110.7
105510381003663
28.3 27.9 26.9 17.8
2126209920351362
57.056.254.536.5
3722361634412167
99.796.992.258.1
4251412639212460
11411110565.9
125 8.6
435075110
2.93.45.27.5
99978855
2.72.62.41.4
400394356224
10.710.69.56.0
841824730447
22.622.119.612.0
128312691163742
34.4 34.131.2 19.9
2588256523681525
69.368.763.440.9
4523443239392417
12111910664.8
5166505844842743
13813612073.5
150 10.3
527595130
3.55.26.58.9
11711010168
3.12.92.71.8
473449411278
12.712.011.07.5
994929841557
26.624.922.514.9
151514531345923
40.7 39.0 36.1 24.8
3054294727401895
81.879.073.450.8
5348500445353011
14313412280.7
6109570451623418
16415313891.6
200 13.8
73100125185
5.06.98.612.8
15214513369
4.13.93.61.8
616588544283
16.515.814.67.6
129512191113563
34.732.729.815.1
197419031775940
53.0 51.1 47.7 25.2
3979385836161935
10710396.951.8
6963656460043046
18717616181.6
7953748468353456
21320018392.6
300 20.7
115150200275
7.910.313.819.0
222213190107
6.05.75.12.9
902866773440
24.223.220.711.8
189517981579877
50.848.242.323.5
2892280225321462
77.675.2 67.9 39.2
5830567851623007
15615213880.5
10,193968385174741
273259228127
11,64111,04296915379
312296260144
400 27.6
155200250300350
10.713.817.220.724.1
293282261227171
7.97.67.06.14.6
118911451061926698
31.930.728.424.818.7
25002377217618761399
67.063.758.350.337.5
38133701346330472316
102 99.3 92.9 81.862.2
76857497704862304757
206201189167127
13,44612,80111,73310,1267559
360343314271202
15,35714,59813,35811,5118580
411391358308230
500 34.5
196250300400
13.517.220.727.6
364350330259
9.89.48.87
1476142313451058
39.638.136
28.4
3103295627652134
83.279.274.157.2
4732460043793492
12712311793.6
9538931589057153
256250239192
16,68715,91814,90511,522
447426399309
19,06018,15416,97713,091
511486455351
600 41.4
250300350450500
17.220.724.131
34.5
432419400338288
11.611.210.79.17.7
17521701162613781176
4745.643.637
31.5
36753535335127932364
98.594.789.874.963.4
56285498528945353889
151147142122104
11,35611,13410,74892737976
304298288248214
19,77119,03518,05815,07912,772
530510484404342
22,57521,70920,57217,14214,505
605582551459389
700 48.3
250300350400550600
17.220.724.127.637.941.4
510501487469371314
13.713.413.112.6108.4
206820321979190715141283
55.454.553
51.140.634.4
436642564114393430582575
1171141101058269
660765306397619649924251
177175171166134114
13,29413,18112,95212,58310,2218725
356353347337274234
23,47222,89822,15221,20016,51313,913
629613593568442373
26,82426,14225,26424,15518,76415,796
719700677647503423
- continued -
22
EZH and EZHSO Series
Table 17. Capacities for Types EZH and EZHSO with PRX Series Pilot and Type SA/2 Pilot Supply Filter Regulator (continued)
INLET PRESSURE
OUTLET PRESSURE
CAPACITIES IN THOUSANDS OF SCFH / Nm3/h OF 0.6 SPECIFIC GRAVITY NATURAL GAS USING 1:1 LINE SIZE TO BODY SIZE PIPING
NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100 NPS 6 / DN 150 NPS 8 / DN 200 NPS 12 X 6 / DN 300 X 150
psig bar psig bar SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h
800 55.2
300350400450500609650
20.724.127.631
34.542
44.8
579569556538515441401
15.515.214.914.413.811.810.7
2349231122572187209618001639
6362
60.558.656.248.244
4951483646934517430136443302
13313012612111597.788.5
7517743172957100683559265414
202199196190184159145
15,13515,00514,77014,41313,91012,12111,094
405402396386373325297
26,62326,02325,26824,33423,18619,67417,836
713697677652621527478
30,41829,70628,82027,73126,40122,36320,261
815796772743707599543
900 62.1
350400500600800
24.127.634.541.455.2
649638606557361
17.417.116.2159.7
26302589246622711475
70.569.466.160.939.5
55355416509846412952
14814513712479.1
84248331800374284897
226224214199131
16,97216,82716,24115,14110,062
455451435406270
29,76729,14527,46525,03115,955
797781736671427
34,00433,26831,30228,48718,108
911891839763485
1000 69
350400500600800
24.127.634.541.455.2
726718693654514
19.519.218.617.513.8
29422910281426622097
7978
75.471.356.2
62196118585154774231
167164157147113
93919330909286656922
252250244232186
18,88618,80518,40617,61514,179
506504493472380
33,43332,90631,50229,51922,851
896882844791612
38,21437,58435,93033,62425,962
10241007963901696
1100 75.8
3504505006008001000
24.131
34.541.455.268.9
802786775744635402
21.521.120.82017
10.8
324831903147302525891646
8785.584.381.169.444.1
689467006576625952613287
18518017616814188.1
10,34210,23410,131980785045469
277275272263228147
20,76620,63620,47019,89117,37411,245
556553548533465301
37,04536,04135,38833,71828,39017,766
992966948903761476
42,36341,16040,38838,43532,28420,159
1135110310821030865540
1200 82.7
3505006008001100
24.134.541.455.275.8
877855829741422
2423
22.219.911.3
35513470337030201724
95.293
90.380.946.2
75627282700861723442
20319518816592.2
11,28111,13710,88898765734
302298292265154
22,62022,46522,04320,12911,792
606602591539316
40,62139,17437,73533,28818,607
108810491011892498
46,47144,73343,04037,88321,111
1245119811531015566
1300 89.6
3505006008001160
24.134.541.455.280
952934912839513
2625
24.422.513.7
38523786370434142096
10310199.391.556.2
82247976773570144193
220214207188112
12,21112,12111,93011,1256958
327325320298187
24,45724,41224,11022,62814,299
655654646606383
44,16942,88941,62737,81222,661
1183114911151013607
50,54748,99947,50543,06125,718
1354131312731154689
1400 96.5
3505006008001160
24.134.541.455.280
10261011993930674
27.527.126.625
18.1
41514098402937852753
11111010810173.8
88838660844478125540
238232226209148
13,14013,08812,94212,2949102
352351347330244
26,28026,32526,11824,96118,663
704705700669500
47,69646,55245,43242,09429,923
1278124712171128802
54,60153,20651,87247,96633,986
1463142513901285910
1480 102
3505006008001160
24.134.541.455.280
1085107210561001782
29.128.728.326.821
43884344428440703191
11811611510985.5
94089201900484286447
252247241226173
13,88313,85213,73713,18810,518
372371369354282
27,73127,83727,69226,74421,532
743746742716577
50,50749,45548,42845,39634,812
1353132512971216933
57,83156,53955,31151,75139,561
15491515148213861060
23
EZH and EZHSO Series
Table 18. Capacities for Types EZHOSX and EZHSO-OSX with PRX Series Pilot and Type SA/2 Pilot Supply Filter Regulator
INLET PRESSURE
OUTLET PRESSURE
CAPACITIES IN THOUSANDS OF SCFH / Nm3/h OF 0.6 SPECIFIC GRAVITY NATURAL GAS USING 1:1 LINE SIZE TO BODY SIZE PIPING
NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100 NPS 6 / DN 150
psig bar psig bar SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h
30 2.1 15 1.0 27 0.7 108 2.9 214 5.7 351 9.4 686 18.4
40 2.8 1525
1.01.7
3631
0.90.8
145124
3.93.3
289244
7.76.5
467401
12.510.8
914785
24.521.0
50 3.5152535
1.01.72.4
454135
1.21.10.9
179164138
4.84.43.6
357325270
9.58.77.2
572529447
15.414.212.0
11201035873
30.027.723.4
60 4.1
16203045
1.11.32.03.1
52524838
1.41.41.21.0
210206192150
5.65.55.14.0
421412380294
11.211.010.17.9
669659617489
18.017.716.613.1
131212911208955
35.134.632.425.6
75 5.8
22304060
1.52.02.74.1
63615742
1.71.61.51.1
252244228167
6.76.56.14.4
505486452327
13.513.012.18.7
804781735545
21.621.019.714.6
1576153014391065
42.241.038.528.5
100 6.9
32405085
2.22.73.45.8
81797549
2.22.12.01.3
323315301193
8.68.48.05.1
647628598376
17.316.816.010.1
10291008968629
27.627.026.016.9
2016197318951228
54.052.950.832.9
125 8.6
435075110
2.93.45.17.5
98968754
2.62.52.31.4
392386346215
10.510.39.25.7
786770684420
21.120.618.311.2
125112331117703
33.533.030.018.8
2452241521861372
65.764.758.536.8
150 10.3
527595130
3.55.16.58.9
11611010068
3.12.92.71.8
464437399268
12.411.710.77.2
929869788523
24.923.321.114.0
147814051290875
39.637.734.623.5
2897275025221708
77.673.767.645.8
200 13.8
73100125185
5.06.98.612.8
15114413369
4.03.93.61.8
604573528272
16.215.414.27.3
121011401043529
32.430.628.014.1
192518411705889
51.649.345.723.8
3773360433341735
10196.589.346.5
300 20.7
115150200275
7.910.313.819.0
221212188107
5.95.75.02.9
884845750422
23.722.620.111.3
177116821479823
47.545.139.622.1
2819271224261383
75.772.865.137.1
5525531047442699
14814212772.3
400 27.6
155200250300350
10.713.817.220.724.1
291280259225170
7.87.56.96.04.6
116611171031895672
31.230.027.624.018.0
23372224203817581312
62.659.654.647.135.2
37183583332729072196
99.896.289.378.058.9
72867016650856814287
195188174152115
500 34.5
196250300400
13.517.220.727.6
361348328257
9.79.38.86.9
1447138913081021
38.837.235.127.4
2900276625892001
77.774.169.453.6
4614445442153323
12411911389.2
9042872182466492
242234221174
- continued -
24
EZH and EZHSO Series
Table 18. Capacities for Types EZHOSX and EZHSO-OSX with PRX Series Pilot and Type SA/2 Pilot Supply Filter Regulator (continued)
INLET PRESSURE
OUTLET PRESSURE
CAPACITIES IN THOUSANDS OF SCFH / Nm3/h OF 0.6 SPECIFIC GRAVITY NATURAL GAS USING 1:1 LINE SIZE TO BODY SIZE PIPING
NPS 1 / DN 25 NPS 2 / DN 50 NPS 3 / DN 80 NPS 4 / DN 100 NPS 6 / DN 150
psig bar psig bar SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h SCFH Nm3/h
600 41.4
250300350450500
17.220.724.131
34.5
429416397335286
11.511.110.6
97.7
17171661158313331133
4644.542.435.730.4
34363307313726182217
92.188.684.170.259.4
54805325509743283695
14714313711699
10,73710,426997384587217
288279267227193
700 48.3
250300350400550600
17.220.724.127.637.441.4
507497484465368312
13.613.313
12.59.98.4
203119901933185714621236
54.453.451.849.839.233.1
407939793849368328672415
10910710398.777
64.7
646063546196597547554034
173170166160127108
12,66412,44912,13111,69292917877
339333325313249211
800 55.2
300350400450500609650
20.724.127.631
34.542
44.8
575565552534511438399
15.415.114.814.313.711.710.7
2306226222042130203617401581
61.860.659.157.154.646.642.4
4627452243904227402734163097
12412111811310891.583
7341722770666851657156525149
197194189184176151138
14,39014,15813,83613,40812,85311,04510,059
385379371359344296269
900 62.1
350400500600800
24.127.634.541.455.2
644633602553358
17.317
16.114.89.6
25802534240322031420
69.168
64.459
38.1
51735064477143472770
13913612811774.2
82208099772671234639
220217207191124
16,11115,86715,12113,9309057
432425405373243
1000 69
350400500600800
24.127.634.541.455.2
721712688649510
19.319.118.417.413.7
28912854274825892025
77.576.573.669.454.3
58115719547351283968
156153146137106
91899097880883436589
246244236224177
18,01717,82917,24616,32212,872
483478462437345
1100 75.8
3504505006008001000
24.131
34.541.455.269
796781770739630400
21.320.920.619.816.910.7
319731273079294825061582
85.783.882.579
67.242.4
643962636149585849303084
17316816515713282.7
10,14299749844947481285176
272267264254218139
19,89219,54519,28218,54315,88710,103
533524517497426271
1200 82.7
3505006008001100
24.134.541.455.275.8
871849824736419
23.322.822.119.711.2
35003401329129291658
93.891.188.278.544.4
70616807655657813230
18918217615586.6
11,08410,89410,54994725424
297292283254145
21,74521,25920,65618,52210,588
583570553496284
1300 89.6
3505006008001160
24.134.541.455.280
945927906833509
25.324.824.322.313.6
38003716362333192017
10299.697.188.954.1
76787454723365683934
206200194176105
12,01811,83311,58710,7026591
322317311287177
23,58223,19422,69620,93612,868
632621608561345
1400 96.5
3505006008001160
24.134.541.455.280
10191004986924669
27.326.926.424.818
40994027394636862655
11010810698.871.2
82928091789573125195
222217212196139
12,94612,80212,59811,8588651
347343338318232
25,40825,09924,68423,20616,897
681672661622453
1480 102
3505006008001160
24.134.541.455.280
107810651049994776
28.928.528.126.620.8
43374273420139683082
11611511310682.6
87818596841678876045
235230226211162
13,68513,56813,39212,74610,021
367364359342269
26,86126,60626,24624,95019,579
720713703668525
GF
D
E
H
J
A/2
A
CAUTIOSPRING UNDER COMPRESSIO REMOVE LONG BOLTS STAMPED (LB) LAST
GE01592_B
25
EZH and EZHSO Series
TOP VIEW
C (INDICATOR COVER
REMOVAL CLEARANCE)
R (TRIM REMOVAL
CLEARANCE)
Figure 12. Types EZH and EZHSO Dimensions
Table 19. Types EZH and EZHSO Dimensions
BODY SIZE, NPS / DN
DIMENSIONS, In. / mm
AC D
(maximum) E F G H J RNPT or SWE CL150 RF CL300 RF CL600 RF or
BWE
1 / 25 8.25 / 210
7.25 / 184
7.75 / 197
8.25 / 210
1.50 / 38.1
2.10 / 53
12.3 / 311
13.05 / 331
11.10 / 282
5.10 / 130
8.25 / 210
3.5 / 88.9
2 / 50 11.25 / 286
10.0 / 254
10.50 /267
11.25 / 286
1.50 / 38.1
3.10 / 79
14 / 356
14.75 / 375
11.30 / 287
6.50 / 165
7.75 / 197
4.5 / 114
3 / 80 - - - - 11.75 / 298
12.50 / 317
13.25 / 337
2.00 / 50.8
3.81 / 97
16 / 406
15.36 / 390
16.75 / 425
8.00 / 203
13.25 / 337
6.0 / 152
4 / 100 - - - - 13.9 /353
14.5 / 368
15.5 / 394
2.00 / 50.8
5.06 / 129
18.3 / 464
15.85 / 403
16.8 / 427
10.03 / 255
5.5 / 140
7.5 / 191
6 / 150 - - - - 17.75 / 451
18.62 / 473
20 / 508
2.75 / 70
5.31 / 135
17 / 432
19.25 / 489
25 / 635
13 / 330
18 / 457
8.7 / 221
8 / 200 - - - - 21.38 / 543
22.38 / 568
24 / 610
2.75 / 70
8.25 / 210
17 / 432
19.25 / 489
28.5 / 724
13 / 330
18 / 457
8.7 / 221
12 X 6 / 300 X 150 - - - - 29 / 737
30.5 / 775
32.25 / 819
2.75 / 70
10 / 254
17 / 432
19.25 / 489
28.5 / 724
13 / 330
18 / 457
8.7 / 221
Table 20. Approximate Weights
BODY SIZEAPPROXIMATE SHIPPING WEIGHTS
Flanged NPT, SWE and BWE For Type OSX
NPS DN lbs kg lbs kg lbs kg
1 25 87 39 77 35 Add 17 Add 8
2 50 150 68 136 62 Add 30 Add 14
3 80 410 186 390 177 Add 41 Add 19
4 100 514 234 433 197 Add 57 Add 26
6 150 1460 662 1400 635 Add 74 Add 34
8 200 1875 850 1805 819 - - - - - - - -
12 X 6 300 X 150 2050 930 1970 894 - - - - - - - -
M
N
H
D
0.98 / 25
GE01592_A
26
EZH and EZHSO Series
IN. / mm
Figure 13. Types EZHOSX and EZHSO-OSX Dimensions
Table 21. Types EZHOSX and EZHSO-OSX Dimensions
BODY SIZE
DIMENSION WITH SLAM SHUT
D HM(1) N
Diaphragm Piston Diaphragm Piston Bellows
NPS DN In. mm In. mm In. mm In. mm In. mm In. mm In. mm
1 25 12.0 305 9.8 249
6.4 163 2.8 71 6.9 175 8.0 203 8.8 224
2 50 13.0 330 10.4 264
3 80 14.4 366 11.8 300
4 100 16.8 427 13.6 346
6 150 15.6 359 13.0 330
1. Type 71 BMS with a diaphragm has an M dimension of 2.80 in. / 71 mm.
MECHANISM BOX REMOVAL CLEARANCE
27
EZH and EZHSO Series
Ordering Information Use the Specifications section on page 3 and carefully review the description to the right of each specification. Use this information to complete the Ordering Guide
on the following page. Specify the desired selection wherever there is a choice to be made. Then send the Ordering Guide to your local Sales Office.
- continued -
Ordering GuideType and Body Material (Select One) WCC Steel Type EZH (Spring-to-Close Version)*** Type EZHSO (Spring-to-Open Version)*** LCC Steel Type EZHOSX (Spring-to-Close Version with Slam shut)*** Type EZHSO-OSX (Spring-to-Open Version with Slam shut)***
Body Size (Select One) NPS 1 / DN 25*** NPS 2 / DN 50*** NPS 3 / DN 80*** NPS 4 / DN 100*** NPS 6 / DN 150*** NPS 8 / DN 200*** NPS 12 X 6 / DN 300 X 150***
End Connection Styles (Select One) Types EZH and EZHSO Only WCC Steel NPT (available for NPS 1 and 2 / DN 25 and 50 Body Sizes only)*** CL150 RF*** CL300 RF*** CL600 RF*** SWE (Available for NPS 1 and 2 / DN 25 and 50 Body Sizes only)** BWE** PN 16/40 (For NPS 1 and 2 / DN 25 and 50 Body Sizes only)** PN 25/40 (For NPS 3 / DN 80 Body Size only)** Types EZHOSX and EZHSO-OSX Only LCC Steel CL150 RF** CL300 RF** CL600 RF**
Main Valve Disk Material (Select One) Nitrile (NBR) (standard)*** Fluorocarbon (FKM)*** Polyurethane (PU)***
Pilot Type (Select One) Type PRX/120*** Type PRX/120-AP*** Type PRX/125 (monitor override pilot)*** Type PRX/125-AP (monitor override pilot)***
Outlet Pressure Range (Select One) Type PRX/120 or PRX/125 14.5 to 26 psig / 1.00 to 1.8 bar, Yellow*** 23 to 44 psig / 1.6 to 3.0 bar, Green*** 41 to 80 psig / 2.8 to 5.5 bar, Blue*** 73 to 123 psig / 5.0 to 8.5 bar, Black*** 116 to 210 psig / 8.0 to 14.5 bar, Silver*** 203 to 334 psig / 14.0 to 23.0 bar, Gold*** 319 to 435 psig / 22.0 to 30.0 bar, Aluminum*** Type PRX/120-AP or PRX/125-AP 435 to 1160 psig / 30.0 to 80.0 bar, Clear***
Whisper Trim™ Cage Construction (Optional) [Not available to NPS 1 / DN 25 Body Size] Yes***
Type SA/2 Elastomer Material (Select One) Nitrile (NBR) (standard)*** Fluorocarbon (FKM)***
Pilot Elastomer Material (Select One) Nitrile (NBR) / Polyurethane (PU) (standard)*** Fluorocarbon (FKM)***
Travel Indicator (Select One) Yes*** No***
EZH and EZHSO Series
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Regulators Quick Order Guide* * * Readily Available for Shipment
* * Allow Additional Time for Shipment
* Special Order, Constructed from Non-Stocked Parts. Consult your local Sales Office for Availability.
Availability of the product being ordered is determined by the component with the longest shipping time for the requested construction.
Specification Worksheet Application: Specific Use Line Size Gas Type and Specific Gravity Gas Temperature Does the Application Require Overpressure Protection? Yes No If yes, which is preferred: Relief Valve Monitor Regulator Shutoff Device Is overpressure protection equipment selection assistance desired?
Pressure: Maximum Inlet Pressure (P1max) Minimum Inlet Pressure (P1min) Downstream Pressure Setting(s) (P2) Maximum Flow (Qmax) Minimum Flow (Qmin) Performance Required: Accuracy Requirements?
Other Requirements:
Ordering Guide (continued) Main Valve Spare Parts Kit (Optional) Yes, send one disk parts kit to match this order. Yes, send one full parts kit to match this order.
Pilot Spare Parts Kit (Optional) Yes, send one spare parts kit to match
this order.