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FULL LIFT FULL NOZZLE DESIGN CERTIFIED HIGH ......N10 N N11 P N12 Q N13 R N14 T N15 Special YOpen...

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  • BOMAFA: THE NUMBER ONE SPECIALIST IN INDIVIDUAL SOLUTIONS

    BOMAFA develops and produces high quality valves for stem, gas and water. The valves are used inconvention and nuclear power stations, chemical and petrochemical plants and range of other industrial applications.

    Our extensive rang of custom manufactured valves is of the highest is quality and renowned for their impressive durability.

    Our product range consists of :

    The construction is made in accordance with the requirements of modem construction techniques and of current statutory regulations.

    This is how we work-Applying the highest quality with the greatest professionalism :

    01. Safety Relief Valve

    02 HP Bypass Valve

    03. LP Bypass Valve

    04. Spray Water Valve

    05. Extraction Valve

    06. Desuperheaters Combined

    07. Desuperheaters Stand Alone

    08. PRDS Valve

    09. Dump Tube

    10. Spray Nozzle

    11. Customized Control Valve

    12. Steam Engineering Equipment

    Low noise designed special valve.Short maintenance time thanks to easily removable internal components.Highly robust yet easy to disable, if required.High Precision.Design that takes in to account plant outlay. Shortmaintenance time thanks to easily removable internalcomponents.

    2

  • INHOUSE SOLIDWORKS FLOW SIMULATION PROJECT REPORT

    BOMAFA Special

    Valve Solutions P

    rivate Limited

    SOLIDWORKS Fl

    ow Simulation

    Project Report

    Fluid Flow Simulation Report

    2. Results

    2.1 Analysis Goals

    Name Unit Value Progress Use in convergence

    SG Mass Flow Rate kg/s 1.6632 100 On

    SG Av Velocity m/s 295.091 100 On

    2.2 Results

    2.2.1 Contour of Pressure :

    Fluid Flow Simula

    tion Report

    2.2.2 Contour of V

    elocity :

    Fluid Flow Simulation Report2.2.3 Contour of Density :

    3

  • Safety valves are pressure relieving device to release the excess pressure built up during the operation of the equipment on which they are mounted. They protect the equipment that can be destroyed by the excess pressure built up by rapidly releasing the unwanted excess pressure. The Bomafa safety valves offer the reliable and proven protection against over pressure in any applications of steam , gas or liquid service.

    In normal operation of the equipment, safety valves mounted are closed by seat tightness according to API 527 achieved from the external forces provided by the spring mounted in the bonnet. The seat tightness achieved over a long period of operation in Bomafa safety valves is by the special design of free floating disc mounted in the disc guide that is guided in the guide with precise tolerances. The nozzle is either screwed in the body in flanged safety valves and screwed and welded construction in buttweld and safety valves. In the safety valves with single blowdown ring the adjustment of blowdown is carried out by adjusting ring which is provided at the upper end of the nozzle. In case of safety valves with double blowdown ring, the upper ring is used to fine adjust the blow down Petrochemical Industry and the lower ring is used to assist the pop action. The back pressure can be adjusted by the back pressure adjustment needle mounted in the back pressure housing. The springs are either coil spring or Belleville - disc spring mounted in the open or close bonnet construction to achieve the required opening pressure.

    The safety valves are designed according to API 526 from inlet sizes 1” to 8” and the orifice designation from D to T. The safety valves are designed to meet the maximum over pressure of 10% in case of compressible fluids and 25% in case of non compressible fluids. The safety valves have a maximum blowdown of 5% in case of steam and gas. The maximum blow down for liquid service is 25%. Major body and bonnet materials include ASTM SA 216 GR WCB, ASTM SA 217 GR WC6, ASTM SA 217 GR WC9, ASTM SA 217 GR WC9, C12A, austenitic as well as low temperature material grades.

    General Information

    Construction

    Design

    INFORMATION

    One design for steam, gas and liquid makes it easy for the replacements. Flanged as well as butt weld designs available as per customer requirements.

    Plasma nitride guiding parts for high temperature service insures the required hardness of 600 V to 700 V for tight seating surfaces and free moment of sliding parts to have excellent repeatability and reliability. Hard faced trim with stellite also available on request. Soft seat construction available on request. Closed or open bonnet with packed or conventional lifting lever.

    Test gag optional on request.

    Heavy duty spindle and guide for accurate and consistent operation at all pressure and temperature.

    Flanged and butt weld end connections to meet all national and international standards for mounting and installation.

    Drain point at the lowest section of body to eliminate and drain the liquid and or residue that may be accumulated over time.

    Balanced bellow design available for compensating the back pressure.

    Process Industry

    Power

    Chemical Industry

    Petrochemical Industry

    Storage vessel Piping

    Sugar

    Pulp & Paper

    Nuclear

    Pharmaceutical

    Application

    Highlights

    4

  • A spring loaded pressure relief valve actuated by the static pressure upstream of the valve and characterised by rapid opening or pop action. A safety valve is normally used with compressible fluids. A spring loaded pressure relief valve that may be used as either a safety or relief valve depending on the application. A spring loaded pressure relief valve actuated by the static pressure upstream of the valve. The valve opens normally in proportion to the pressure increase over the opening pressure. The relief valve is use primarily with incompressible fluid. The audible or visible escape of compressible fluid between the seat and disc of a pressure relief valve that may occur at an inlet static pressure below the set pressure prior to opening. The value of increasing static pressure at which there is a measurable lift of the disc or at which discharge of the fluid becomes continuous, as determined by seeing, feeling or hearing.

    The inlet gauge pressure at which the pressure relief device is set to open under service conditions.

    The pressure increase over the set pressure of the relieving device. Over pressure is expressed in pressure units or as a percentage of set pressure. Over pressure is the same as accumulation only when the relieving device is set to open at the MAWP of the vessel. The pressure increase over the MAWP of the vessel, expressed in pressure units or as a percentage of the MAWP or design pressure.

    The difference between the set pressure and the closing pressure of a pressure relief valve, expressed as a percentage of the set pressure or in pressure units.

    The value of decreasing inlet static pressure at which the valve disc re-establishes contact with the seat or at which lift becomes zero as determined by seeing, feeling or hearing.

    A nominal area used with an effective discharge coefficient to calculate the relieving capacity of a pressure relief valve per preliminary sizing equations.

    The actual travel of the disc from the closed position when a valve is relieving. The maximum gauge pressure permissible at the top of a completed vessel in its normal operating position at the designated coincident temperature specified for that pressure.

    Safety Valve

    Safety relief valve

    Relief valve

    Simmer

    Opening pressure

    Set Pressure

    Over pressure

    Accumulation

    Blow down

    Closing pressure

    Effective discharge area / Effective orifice area

    Lift

    Maximum allowable working pressure (MAWP)

    The MAWP is the basis for the pressure setting of the pressure relief devices that protect the vessel. The MAWP is normally greater than the design pressure but can be equal to the design pressure when the design rules used only to calculate the minimum thickness for each element and the calculations are not made to determine the value of MAWP. The specified inlet static pressure at which a seat leak test is performed. The abnormal, rapid reciprocating motion of the movable parts of the pressure relief valve. During the fluttering, the disc does not contact the seat or the upper stop. The opening and closing of pressure relief valve at a very high frequency ( on the order of natural frequency of the valves spring mass system). A nominal value used with an effective discharge area to calculate the relieving capacity of a pressure relief valve per the preliminary sizing equation. The ratio of the mass flow rate in a valve to that of an ideal nozzle. The coefficient of discharge is used for calculating flow thru a pressure relief device. The rated capacity of steam, air, gas or water as required by applicable code. The area of the cylindrical or conical discharge opening between the seating surfaces above the nozzle seat created by the lift of the disc.

    An annular chamber located at the down stream of the seat of a pressure relief valve for the purpose of assisting the valve to achieve lift. The pressure at which a pressure relief valve is adjusted to open on the test stand. The CDTP includes corrections for the service conditions of back pressure or temperature or both. The pressure that exists at the outlet of a pressure relief device as result of the pressure in the discharge system. Back pressure is the sum of superimposed and built up back pressures. The increase in pressure at the outlet of the pressure relief device that develops as a result of flow after the pressure relief device opens. The static pressure that exists at the outlet of a pressure relief device at the time the device is required to operate. Superimposed back pressure is the result of pressure in the discharge system coming from other sources and may be constant or variable..

    Leak test pressure

    Flutter

    Chatter

    Effective coefficient of discharge

    Coefficient of discharge

    Capacity

    Curtain area

    Huddling Chamber

    Cold differential test pressure (CDTP )

    Back pressure

    Built up back pressure

    Superimposed back pressure

    TERMS & DEFINITIONS

    5

  • SAFETY VALVE CODE SYSTEM

    Symbol Regula n

    SVA ASMESVI IBR

    Code Size

    A 150#B 300#C 600#D Special

    Code

    M FlangedN Welded

    Code Size

    10 2520 4030 5040 6550 8060 10070 15080 20090 250

    100 SpecialCode

    M FlangedN Welded

    Code

    Code Nozzle

    N1 DN2 EN3 FN4 GN5 HN6 JN7 KN8 LN9 M

    N10 NN11 PN12 QN13 RN14 TN15 Special

    Y OpenZ Close

    Code Size

    30 50 Code40 6550 80 J Yes60 100 K No70 15080 20090 250

    100 SpecialCode

    L YesM No

    Code Size

    A 150#B 300#C 600# CodeD 900#E 1500# 1 SingleF 2500# 2 DoubleG Special

    Example:-SVA - 30 X N6 X 50 - B X A - M X N - R - Y X K - M - 2ASME - 50 X J X 80 - 300# X 150# - Flanged X Flanged - A 216 Gr WCB - Open Cap X No Test Gag - No Bellow - Double Blow Down Ring

    Outlet Connec on

    Inlet Size

    Outlet Size

    Nozzle

    Code

    R A 216 Gr WCBS A 217 Gr WC6T A 217 Gr WC9U A 217 C 12 A

    AusteStainless Steel

    W Special

    V

    Body Material Code

    Bellow

    Series Code

    CAP Construc on

    Test Gag

    Blow Down Ring

    Ra

    Ra

    Inlet Connec on

    1 2 3 4 5

    6

    7

    6 7 9 108

    8

    9

    1

    2

    3

    4

    5

    11

    10

    11

    12

    12 13

    13

    X X X X X

    6

  • FULLY CLOSE

    WARN PRESSURE FULLY OPEN

    SAFETY VALVE OPENING PATTERN

    7

  • 12

    10

    14

    8

    21

    18

    22

    27

    19

    20

    23

    24

    17

    26

    25

    13

    15

    16

    1

    3

    2

    7

    4

    6

    5

    9

    11

    8

    16

    25

    20

    26

    29

    21

    22

    24

    27

    19

    28

    23

    15

    17

    18

    13

    11

    1

    3

    7

    4

    6

    5

    9

    12

    10

    14

    2

    SAFETY VALVE WITH COIL SPRING AND SINGLE BLOW DOWN RING

    ITEM NO. DESIGNATION

    1 BODY

    2 NOZZLE

    3 BLOW DOWN RING

    4 BLOW DOWN RING PIN

    5 LOCK

    6 SEAL

    7 DISC

    8 SPINDLE

    9 DISC GUIDE

    10 SPINDLE LOCK NUT

    11 SPINDLE PIN

    12 GUIDE

    13 LOWER SPRING BUTTON

    14 SPRING

    15 UPPER SPRING BUTTON

    16 BONNET

    17 BODY STUD BOLT

    18 BODY NUT

    19 SET SCREW

    20 SET SCREW NUT

    21 SPINDLE NUT

    22 CAP

    23 CAP PIN

    24 LEVER PLATE

    25 HANDLE

    26 PIN-1

    27 PIN-2

    28 CAP PIN NUT

    29 NUT

    ITEM NO. DESIGNATION1 BODY

    2 NOZZLE

    3 BLOW DOWN RING

    4 BLOW DOWN RING PIN

    5 LOCK

    6 SEAL

    7 DISC

    8 SPINDLE

    9 DISC GUIDE

    10 SPINDLE LOCK NUT

    11 SPINDLE PIN

    12 GUIDE

    13 DISC SPRING

    14 BONNET

    15 BODY STUD BOLT

    16 BODY NUT

    17 SET SCREW

    18 SET SCREW NUT

    19 SPINDLE NUT

    20 CAP

    21 HANDLE

    22 PIN-1

    23 LEVER PLATE

    24 PIN-2

    25 CAP PIN

    26 CAP PIN NUT

    27 NUT

    SAFETY VALVE WITH DISC SPRING AND SINGLE BLOW DOWN RING

    2

    1

    BUTTWELD END

    2

    1

    BUTTWELD END

    8

  • 19

    3

    24

    25

    31

    21

    2

    12

    15

    14

    5

    16

    17

    30

    26 28

    32

    34

    29

    9

    20

    22

    23

    18

    13

    11

    8

    33

    1

    4

    7

    6

    10

    27 ITEM NO. DESIGNATION1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN 5 BLOW DOWN RING PIN -26 LOCK7 SEAL8 DISC9 SPINDLE10 DISC GUIDE11 SPINDLE LOCK NUT12 SPINDLE PIN13 GUIDE 14 BLOW DOWN RING-215 HOUSING16 REGULATING PIN17 SPINDLE GUIDE18 LOWER SPRING BUTTON19 SPRING20 UPPER SPRING BUTTON21 BONNET22 BODY STUD BOLT23 BODY NUT24 SET SCREW25 SET SCREW NUT26 SPINDLE NUT27 NUT28 CAP29 HANDLE30 LEVER PLATE31 PIN-132 PIN-233 CAP PIN34 CAP NUT

    & BACK PRESSURE ADJUSTMENTSAFETY VALVE WITH COIL SPRING WITH DOUBLE BLOW DOWN RING

    2

    1

    BUTTWELD END

    ITEM NO. DESIGNATION1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN -25 BLOW DOWN RING PIN 6 SEAL7 LOCK8 DISC9 SPINDLE

    10 DISC GUIDE11 SPINDLE LOCK NUT12 SPINDLE PIN13 GUIDE 14 BLOW DOWN RING-215 HOUSING16 REGULATING PIN17 SPINDLE GUIDE18 DISC SPRING19 BONNET20 BODY STUD BOLT21 BODY NUT22 SPINDLE NUT23 SET SCREW24 SET SCREW NUT25 CAP26 HANDLE27 PIN-128 LEVER PLATE29 PIN-230 CAP PIN31 NUT32 CAP NUT

    & BACK PRESSURE ADJUSTMENT SAFETY VALVE WITH DISC SPRING WITH DOUBLE BLOW DOWN RING

    BUTTWELD END

    2

    1

    23

    12

    8

    27

    3122

    2829

    25

    32

    30

    19

    9

    21

    15

    13

    11

    1

    2

    3

    5

    7

    14

    4

    10

    17

    16

    20

    18

    26

    24

    6

    9

  • 35

    36

    30

    33

    31

    29

    34

    28

    2

    1

    3

    4

    7

    5

    6

    89

    10

    11

    12

    13

    1416

    17

    18 19

    20

    21

    22

    23

    24

    25

    20

    26

    2732

    15

    WITH DOUBLE BLOW DOWN RING & BACK PRESSURE ADJUSTMENT0SAFETY VALVE OPERATING ABOVE 400 C WITH COIL SPRING & COOLING

    ITEM NO. DESIGNATION1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN 5 BLOW DOWN RING PIN -26 SEAL7 LOCK8 DISC9 SPINDLE

    10 DISC GUIDE11 SPINDLE LOCK NUT12 SPINDLE PIN13 GUIDE 14 HOUSING15 BLOW DOWN RING-216 REGULATING PIN17 SPINDLE GUIDE18 COOLING19 BODY STUD BOLT20 BODY & BONNET NUT21 LOWER SPRING BUTTON22 SPRING23 UPPER SPRING BUTTON24 BONNET25 BONNET STUD BOLT26 SET SCREW27 SET SCREW NUT28 NUT29 SPINDLE NUT30 CAP31 HANDLE32 PIN-133 LEVER PLATE34 PIN-235 CAP PIN36 NUT

    WITH DOUBLE BLOW DOWN RING & BACK PRESSURE ADJUSTMENTSAFETY VALVE OPERATING ABOVE WITH DISC SPRING & COOLING 0400 C

    ITEM NO. DESIGNATION

    1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN 5 BLOW DOWN RING PIN -26 LOCK7 SEAL8 DISC9 SPINDLE

    10 DISC GUIDE11 SPINDLE LOCK NUT12 SPINDLE PIN13 GUIDE 14 BLOW DOWN RING-215 HOUSING16 REGULATING PIN17 SPINDLE GUIDE18 COOLING19 BODY STUD BOLT20 BODY/BONNET NUT21 DISC SPRING22 BONNET23 BONNET STUD BOLT24 SET SCREW25 SET SCREW NUT26 SPINDLE NUT27 NUT28 CAP29 CAP PIN30 CAP NUT31 HANDLE32 PIN-133 LEVER PLATE34 PIN-2

    BUTTWELD END

    1

    2

    BUTTWELD END

    1

    2

    5

    14

    17

    27

    19

    26

    33

    28

    34

    30

    29

    21

    23

    18

    12

    118

    32

    14

    7

    6

    10 13

    22

    31

    24

    25

    32

    9

    20

    16

    1520

    10

  • 27

    20

    15

    19

    15

    21

    29

    23

    28

    25

    24

    16

    18

    13

    11

    10

    8

    7

    4

    2

    1

    3

    6

    5

    9

    12

    14

    17

    26

    22

    1

    2

    0SAFETY VALVE OPERATING ABOVE 400 C WITH COIL SPRING & COOLING WITH SINGLE BLOW DOWN RING

    ITEM NO. DESIGNATION

    1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN 5 LOCK6 SEAL7 DISC8 SPINDLE9 DISC GUIDE

    10 SPINDLE LOCK NUT11 SPINDLE PIN12 GUIDE 13 COOLING14 BODY STUD BOLT15 BODY & BONNET NUT16 LOWER SPRING BUTTON17 SPRING18 UPPER SPRING BUTTON19 BONNET20 BONNET STUD BOLT21 SET SCREW22 SET SCREW NUT23 SPINDLE NUT24 NUT25 CAP26 CAP PIN27 CAP NUT28 HANDLE29 PIN-130 LEVER PLATE31 PIN-2

    SAFETY VALVE OPERATING ABOVE WITH DISC SPRING & COOLING 0400 C WITH SINGLE BLOW DOWN RING

    ITEM NO. DESIGNATION

    1 BODY

    2 NOZZLE

    3 BLOW DOWN RING PIN

    4 BLOW DOWN RING

    5 LOCK

    6 SEAL

    7 DISC

    8 SPINDLE

    9 DISC GUIDE

    10 SPINDLE LOCK NUT

    11 SPINDLE PIN

    12 GUIDE

    13 COOLING

    14 BODY STUD BOLT

    15 BODY/BONNET NUT

    16 DISC SPRING

    17 BONNET

    18 BONNET STUD BOLT

    19 SET SCREW

    20 SET SCREW NUT

    21 SPINDLE NUT

    22 NUT

    23 CAP

    24 CAP PIN

    25 CAP PIN NUT

    26 HANDLE

    27 PIN-1

    28 PIN-2

    29 LEVER PLATEBUTTWELD END

    BUTTWELD END

    1

    2

    29

    22

    21

    1615

    9

    15

    24

    11

    23

    30

    25

    31

    27

    26

    18

    20

    13

    10

    8

    3 2

    14

    6

    5

    7

    12

    14

    19

    17

    28

    11

  • 19

    12

    8

    24

    2821

    25

    26

    22

    29

    27

    16

    9

    18

    13

    11

    1

    2

    3

    5

    6

    14

    4

    10

    17

    15

    23

    20

    7

    16

    11

    8

    3

    1

    4

    7

    6

    10

    13

    28

    18

    19

    29

    2

    12

    21

    23

    14

    5

    22

    30

    20

    25

    31

    27

    26

    9

    17

    15

    24

    ITEM NO. DESIGNATION1 BODY2 NOZZLE3 BLOW DOWN RING4 BLOW DOWN RING PIN 5 BLOW DOWN RING PIN -26 LOCK7 SEAL8 DISC9 SPINDLE

    10 DISC GUIDE11 SPINDLE LOCK NUT12 SPINDLE PIN13 GUIDE 14 BLOW DOWN RING-215 LOWER SPRING BUTTON16 SPRING17 UPPER SPRING BUTTON18 SET SCREW19 SET SCREW NUT20 SPINDLE NUT21 NUT22 BONNET23 BODY STUD BOLT24 BODY NUT25 CAP26 CAP PIN27 CAP NUT28 HANDLE29 PIN-130 LEVER PLATE31 PIN-2

    SAFETY VALVE WITH DISC SPRING WITH DOUBLE BLOW DOWN RING

    ITEM NO. DESIGNATION

    1 BODY

    2 NOZZLE

    3 BLOW DOWN RING

    4 BLOW DOWN RING PIN -2

    5 BLOW DOWN RING PIN

    6 LOCK

    7 SEAL

    8 DISC

    9 SPINDLE

    10 DISC GUIDE

    11 SPINDLE LOCK NUT

    12 SPINDLE PIN

    13 GUIDE

    14 BLOW DOWN RING-2

    15 DISC SPRING

    16 BONNET

    17 BODY STUD BOLT

    18 BODY NUT

    19 SET SCREW

    20 SET SCREW NUT

    21 SPINDLE NUT

    22 CAP

    23 HANDLE

    24 PIN-1

    25 LEVER PLATE

    26 PIN-2

    27 CAP PIN

    28 NUT

    29 CAP NUT

    SAFETY VALVE WITH COIL SPRING WITH DOUBLE BLOW DOWN RING

    12

  • MATERIAL CHART

    A. Hard facing : Stellite available on request.B. For any other material contact factory.C. Bellow material as per requirement.D. Cooling material as per requirement.

    0E. For temperature above 500 C contact factory.F. * Plasma Nitrided.

    MAIN COMPONENTS400 510 550

    MATERIALS

    NUTS

    BODYBONNET

    COOLING PIECECAP

    LEVERSPINDLE

    DISCDISC GUIDE

    NOZZLEBLOW DOWN RING

    SET SCREWUPPER SPRING BUTTONLOWER SPRING BUTTON

    SPINDLE NUTSPINDLE LOCK NUT

    SPRINGSTUDS

    SA 216 GR WCBSA 216 GR WCB

    SA 216 GR WCBSA 216 GR WCB

    SS 410

    SS 410SS 410

    SS 410SS 410SS 410SS 316SS 410

    SS 410 CAD PLATEDSS 410 CAD PLATED

    SPRING STEEL SA 193 GR B7SA 194 GR 2H

    SA 217 GR WC6

    SA 217 GR WC6SA 217 GR WC6

    SA 216 GR WCBSA 216 GR WCB

    DIN 1.4923 PL NT*DIN 1.4923 PL NT*

    SA 182 F 11 PL NT*DIN 1.4923 PL NT*

    SS 410

    SS 410SS 410

    NIMONIC STEEL

    SS 410 CAD PLATEDSS 410 CAD PLATED

    DIN 1.4923 PL NT*

    SS 193 GR B16SS 194 GR 16

    SA 217 GR WC9

    SA 216 GR WCBSA 216 GR WCB

    SA 182 F 22 PL NT*

    SA 217 GR WC9SA 217 GR WC9

    SS 410SS 410

    NIMONIC STEELSS 193 GR B16SS 194 GR 16

    DIN 1.4923 PL NT*DIN 1.4923 PL NT*DIN 1.4923 PL NT*

    DIN 1.4923 PL NT*SS 410

    SS 410 CAD PLATEDSS 410 CAD PLATED

    OTEMPERTURE MAXIMUM. C

    13

  • "D" ORIFICE (EFFECTIVE ORIFICE AREA = 0.110 SQ. IN.)

    "E" ORIFICE (EFFECTIVE ORIFICE AREA = 0.196 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -59.4° C -29.4° C -73.3° C E ET T T T

    1D2 150 150 20.03 13 5.62 4-1/8 4-1/21D2 300 150 52.02 43.24 28.83 4-1/8 4-1/21D2 600 150 104.05 86.83 58 4-1/8 4-1/2

    Chrome 1D2 300 150 35.86 15.11 4-1/8 4-1/2Molybdenum Steel 1D2 600 150 71.36 30.23 4-1/8 4-1/2

    Austen 1D2 150 150 19.33 19.33 19.33 12.66 5.62 1.41 4-1/8 4-1/2Stainless 1D2 300 150 50.62 50.62 50.62 34.8 29.53 24.61 4-1/8 4-1/2Steel 1D2 600 150 101.24 101.24 101.24 68.55 59.41 49.21 4-1/8 4-1/2

    MaterialsMaximum Inlet Flange (Set) Pressure Limit

    onven d Balan s Valve

    ASME FlangeClass

    Carbon Steel

    Center-to-FaDimensions

    (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -59.4° C -29.4° C -73.3° C E ET T T T

    1E2 150 150 20.03 13 5.62 4-1/8 4-1/21E2 300 150 52.02 43.24 28.83 4-1/8 4-1/21E2 600 150 104.05 86.83 58 4-1/8 4-1/2

    Chrome 1E2 300 150 35.86 15.11 4-1/8 4-1/2Molybdenum Steel 1E2 600 150 71.36 30.23 4-1/8 4-1/2

    Austen 1E2 150 150 19.33 19.33 19.33 12.66 5.62 1.41 4-1/8 4-1/2Stainless 1E2 300 150 50.62 50.62 50.62 34.8 29.53 24.61 4-1/8 4-1/2Steel 1E2 600 150 101.24 101.24 101.24 68.55 59.41 49.21 4-1/8 4-1/2

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    Dimensionsonven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    14

  • "F" ORIFICE (EFFECTIVE ORIFICE AREA = 0.307 SQ. IN.)

    "G" ORIFICE (EFFECTIVE ORIFICE AREA = 0.503 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    1- 1/2F2 150 150 20.03 13 5.62 4-7/8 4-3/41-1/2F2 300 150 52.02 43.24 28.83 4-7/8 61-1/2F2 600 150 104.05 86.83 58 4-7/8 6

    Chrome 1-1/2F2 300 150 35.86 15.11 4-7/8 6Molybdenum Steel 1-1/2F2 600 150 71.36 30.23 4-7/8 6

    Austen 1-1/2F2 150 150 19.33 19.33 19.33 12.66 5.62 1.41 4-7/8 4-3/4Stainless 1-1/2F2 300 150 50.62 50.62 50.62 34.8 29.53 24.61 4-7/8 6Steel 1-1/2F2 600 150 101.24 101.24 101.24 68.55 59.41 49.21 4-7/8 6

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    1- 1/2G3 150 150 20.03 13 5.62 4-7/8 4-3/41-1/2G3 300 150 52.02 43.24 28.83 4-7/8 61-1/2G3 600 150 104.05 86.83 58 4-7/8 6

    Chrome 1-1/2G3 300 150 35.86 15.11 4-7/8 6Molybdenum Steel 1-1/2G3 600 150 71.36 30.23 4-7/8 6

    Austen 1-1/2G3 150 150 19.33 19.33 19.33 12.66 5.62 1.41 4-7/8 4-3/4Stainless 1-1/2G3 300 150 50.62 50.62 50.62 34.8 29.53 24.61 4-7/8 6Steel 1-1/2G3 600 150 101.24 101.24 101.24 68.55 59.41 49.21 4-7/8 6

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    15

  • "H" ORIFICE (EFFECTIVE ORIFICE AREA = 0.785 SQ. IN.)

    "J" ORIFICE (EFFECTIVE ORIFICE AREA = 1.287 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4 -73.3° C E ET T T T

    2J3 150 150 20.03 13 5.62 5-3/8 5-7/83J4 300 150 52.02 43.24 28.83 7-1/4 7-1/83J4 600 150 104.05 86.83 58 7-1/4 7-1/8

    Chrome 3J4 300 150 35.86 15.11 7-1/4 7-1/8Molybdenum Steel 3J4 600 150 71.36 30.23 7-1/4 7-1/8

    Austen 2J3 150 150 19.33 19.33 19.33 12.66 5.62 1.41 5-3/8 5-7/8Stainless 3J4 300 150 (35.15) 50.62 50.62 34.8 29.53 24.61 7-1/4 7-1/8Steel 3J4 600 150 (43.94) 101.24 101.24 68.55 59.41 49.21 7-1/4 7-1/8

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    1- 1/2H3 150 150 20.03 13 5.62 5-1/8 4-7/82H3 300 150 52.02 43.24 28.83 5-1/8 4-7/82H3 600 150 104.05 86.83 58 6-1/16 6-3/8

    Chrome 2H3 300 150 35.86 15.11 5-1/8 4-7/8Molybdenum Steel 2H3 600 150 71.36 30.23 5-1/8 4-7/8

    Austen 1-1/2H3 150 150 19.33 19.33 19.33 12.66 5.62 1.41 5-1/8 4-7/8Stainless 2H3 300 150 50.62 50.62 50.62 34.8 29.53 24.61 5-1/8 4-7/8Steel 2H3 600 150 101.24 101.24 101.24 68.55 59.41 49.21 6-1/16 6-3/8

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    16

  • "K" ORIFICE (EFFECTIVE ORIFICE AREA = 1.838 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    3K4 150 150 20.03 13 5.62 6-1/8 6-3/83K4 300 150 52.02 43.24 28.83 6-1/8 6-3/83K4 600 150 104.05 86.83 58 7-1/4 7-1/8

    Chrome 3K4 300 150 35.86 15.11 6-1/8 6-3/8Molybdenum Steel 3K4 600 150 71.36 30.23 7-1/4 7-1/8

    Austen 3K4 150 150 19.33 19.33 19.33 12.66 5.62 1.41 6-1/8 6-3/8Stainless 3K4 300 150 (36.91) 50.62 50.62 34.8 29.53 24.61 6-1/8 6-3/8Steel 3K4 600 150 (42.18) 101.24 101.24 68.55 59.41 49.21 7-1/4 7-1/8

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-F

    Class Dimensions

    Temperature Range I e - 462.7 °C to 537.7°C

    Temperature Range I e - 267.7 °C to 537.7°C

    onven nal an Bellows Valve (in)

    Temperature Range I e - 28.8 °C to 426.6°C

    Carbon Steel

    "L" ORIFICE (EFFECTIVE ORIFICE AREA = 2.853 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4 -73.3° C E ET T T T

    3L4 1504L6 3004L6 600

    150150150

    20.0352.02

    (70.31)

    13 5.62 6-1/8 6-1/243.24 28.83 7-1/16 7-1/8

    (70.31) 58 7-1/16 8

    Chrome 4L6 300 150 35.86 15.11 7-1/16 7-1/8Molybdenum Steel 4L6 600 150 (70.31) 30.23 7-1/16 8

    Austen 3L4 150 150 19.33 19.33 19.33 12.66 5.62 1.41 6-1/8 6-1/2Stainless 4L6 300 150 (37.61) 50.62 50.62 34.8 29.53 24.61 7-1/16 7-1/8Steel 4L6 600 150 (37.61) (70.31) (70.31) 68.55 49.21 7-1/16 8

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-F

    Class Dimensions

    Temperature Range I e - 462.7 °C to 537.7°C

    Temperature Range I e - 267.7 °C to 537.7°C

    (in)

    Temperature Range I e - 28.8 °C to 426.6°C

    Carbon Steel

    17

  • "M" ORIFICE (EFFECTIVE ORIFICE AREA = 3.60 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    4M6 150 150 20.03 13 5.62 7 7-1/44M6 300 150 52.02 43.24 28.83 7 7-1/44M6 600 150 (77.34) (77.34) 58 7 8

    Chrome 4M6 300 150 35.86 15.11 7 7-1/4Molybdenum Steel 4M6 600 150 (70.31) 30.23 7 8

    Austen 4M6 150 150 19.33 19.33 19.33 12.66 5.62 1.41 7 7-1/4Stainless 4M6 300 150 (36.61) 50.62 50.62 34.8 29.53 24.61 7 7-1/4Steel 4M6 600 150 (42.18) (77.34) (77.34) 68.55 59.41 49.21 7 8

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    4N6 150 150 20.03 13 5.62 7-3/4 8-1/44N6 300 150 52.02 43.24 28.83 7-3/4 8-1/44N6 600 150 (70.31) (70.31) 58 7-3/4 8-1/4

    Chrome 4N6 300 150 35.86 15.11 7-3/4 8-1/4Molybdenum Steel 4N6 600 150 (70.31) 30.23 7-3/4 8-1/4

    Austen 4N6 150 150 19.33 19.33 19.33 12.66 5.62 1.41 7-3/4 8-1/4Stainless 4N6 300 150 (31.64) 50.62 50.62 34.8 29.53 24.61 7-3/4 8-1/4Steel 4N6 600 150 (35.15) (70.31) (70.31) 68.55 59.41 49.21 7-3/4 8-1/4

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    "N" ORIFICE (EFFECTIVE ORIFICE AREA = 4.34 SQ. IN.)

    18

  • "P" ORIFICE (EFFECTIVE ORIFICE AREA = 6.38 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    4P6 150 150 20.03 13 5.62 7-1/8 94P6 300 150 (36.91) (36.91) 28.83 8-7/8 104P6 600 150 (70.31) (70.31) 58 8-7/8 10

    Chrome 4P6 300 150 35.86 15.11 8-7/8 10Molybdenum Steel 4P6 600 150 (70.31) 30.23 8-7/8 10

    Austen 4P6 150 150 (12.3) 19.33 19.33 12.66 5.62 1.41 7-1/8 9Stainless 4P6 300 150 (21.09) (36.91) (36.91) 34.8 29.53 24.61 8-7/8 10Steel 4P6 600 150 (33.75) (70.31) (70.31) 68.55 59.41 49.21 8-7/8 10

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    "Q" ORIFICE (EFFECTIVE ORIFICE AREA = 11.05 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    6Q8 150 150 (11.60) (11.60) 5.62 9-7/16 9-1/26Q8 300 150 (21.09) (21.09) (21.09) 9-7/16 9-1/26Q8 600 150 (42.18) (42.18) (42.18) 9-7/16 9-1/2

    Chrome 6Q8 300 150 (11.60) (11.60) 9-7/16 9-1/2Molybdenum Steel 6Q8 600 150 (42.18) 30.23 9-7/16 9-1/2

    Austen 6Q8 150 150 (11.60) (11.60)(11.60)(11.60) 5.62 1.41 9-7/16 9-1/2Stainless 6Q8 300 150 (17.58) (21.09)(21.09)(21.09) 9-7/16 9-1/2Steel 6Q8 600 150 (21.09) (42.18) (42.18)(42.18) 9-7/16 9-1/2

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions(in)

    (42.18)(21.09)

    (42.18)(21.09)

    19

  • "R" ORIFICE (EFFECTIVE ORIFICE AREA = 16.00 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    6R8 150 150 (7.03) (7.03) 5.62 9-7/16 9-1/26R10 300 150 (16.17) (16.17) (16.17) 9-7/16 10-1/26R10 600 150 (21.09) (21.09) (21.09) 9-7/16 10-1/2

    Chrome 6R8 300 150 (7.03) (7.03) 9-7/16 9-1/2Molybdenum Steel 6R10 600 150 (21.09) (21.09) 9-7/16 10-1/2

    Austen 6R8 150 150 (3.87) (7.03) (7.03) (7.03) 5.62 1.41 9-7/16 9-1/2Stainless 6R10 300 150 (10.55) (16.17) (16.17) (16.17) (16.17) (16.17) 9-7/16 10-1/2Steel 6R10 600 150 (14.06) (21.09) (21.09) (21.09) (21.09) (21.09) 9-7/16 10-1/2

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensionsonven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    Temperature Rang usive - 267.7 °C to 537.7°C

    "T” ORIFICE (EFFECTIVE ORIFICE AREA = 26.00 SQ. IN.)

    ValveSize

    O OInlet by I U I U

    Body/ N T -267.7° C -59.4° C -28.8° C N TBonnet by L L to to to 232.2° C 426.6° C 537.7° C L L

    Outlet E E -60° C -29.4° C -73.3° C E ET T T T

    8T10 150 150 (4.57) (4.57) (4.57) 10-7/8 118T10 300 150 (8.44) (8.44) (8.44) 10-7/8 118T10 300 150 (21.09) (21.09) (21.09) 10-7/8 11

    Chrome 8T10 300 150 (8.44) 7.03 10-7/8 11Molybdenum Steel 8T10 300 150 (21.09) (15.12) 10-7/8 11

    Austen 8T10 150 150 (3.52) (7.03) (7.03) (7.03) (7.03) 1.41 10-7/8 11Stainless 8T10 300 150 (3.52) (7.03) (7.03) (7.03) (7.03) (7.03) 10-7/8 11Steel

    MaterialsASME Flange Maximum Inlet Flange (Set) Pressure Limit Center-to-Fa

    Class Dimensions

    Temperature Rang usive - 267.7 °C to 537.7°C

    onven d Balan s Valve (in)

    Temperature Rang usive - 28.8 °C to 426.6°C

    Carbon Steel

    Temperature Rang usive - 462.7 °C to 537.7°C

    20

  • TABLE OF ORIFICE Vs AREA

    2Area inch

    D

    0.110

    E

    0.196

    F

    0.307

    G

    0.503

    H

    0.785J

    1.287

    K

    1.838

    L

    2.853

    2Area inch

    NM

    3.60

    P

    4.34

    Q

    6.38

    R

    11.05

    T

    16.00 26.00

    ORIFICE AREA CALCULATIONGas or VaporAPI 520

    A= W * T*Z C * Kd *P1 * Kb * Kc M

    Fluid:Code / Standard:

    Formula:

    Nomenclature:2Require ective discharge area in inch

    Required flow through the device lb/hrSet pressure * 1.1 plus atmospheric pressure psiaCapacity correction factor due to back pressureMolecular weight of the gas or vapor lb/lb-moleE ective discharge co icientRupture disc correction factorRelieving temperature of inlet gas or vapor RCompressibity factor Function of the ratio of ideal gas specific heats ( k = Cp / CV) of the gas or vapor at inlet condition

    AWPsKbMKdKCTZ C

    SteamAPI 520

    A= W 51.5 * P1 * Kd * Kb * Kc * KN * KSH

    Fluid:Code / Standard:

    Formula:

    Nomenclature:2Require ective discharge area in inch

    Required flow rate lb/hrSet pressure * 1.1 plus atmospheric pressure psiaE ective discharge co icientCapacity correction factor due to back pressureRupture disc correction factorCorrection factor for the Napier equation. Superheat correction factor

    AWP1KdKbKcK NKSH

    SteamIBR

    A= E C * P

    Fluid:Code / Standard:

    Formula:

    Nomenclature:2Require ective discharge area in mm

    Required flow rate Kg/hrE ective discharge co cientSet pressure * over pressure plus atmospheric pressure Bar A

    AECP

    F ontact factory. 21

  • F tact factory.

    2Area inch

    D

    0.110

    E

    0.196

    F

    0.307

    G

    0.503

    H

    0.785J

    1.287

    K

    1.838

    L

    2.853

    2Area inch

    M

    3.60

    N

    4.34

    P

    6.38

    Q

    11.05

    R

    16.00

    T

    26.00

    TABLE OF ORIFICE Vs AREA

    Liquid API 520

    A= Q * Gp 38* K * K * K * K *K 1.25*P - Pd c v 2

    Fluid:Code / Sta dard:

    Formula:

    Nome clature:2Require ective di cha rea i ch

    Required flo hrou h the device U al / miE ective di cha icieCorrectio actor due to back pre ureRupture di c correctio actorCorrectio actor due to vi co ityCorrectio actor due to over pre ureSpecifi ravity of liquid at temperatureSet pre ure i iTotal back pre ure i i

    AQKDKKCKvKpGPP2

    ORIFICE AREA CALCULATION

    22

  • Re = Reynold's Number

    100.3

    K

    Visc

    osity

    C

    orre

    ctio

    n

    Fact

    orv

    1 102 103 104 105

    0.4

    0.5

    0.6

    0.7

    0.8

    0.9

    1.0

    FIGURE 2 - CAPACITY CORRECTION FACTOR K DUE TO VISCOSITYV

    0.4

    0.5

    0.6

    0.7

    0.8

    0.9

    1.0

    1.1

    0.3

    0.2

    0.1

    0.010 20 30 40 50

    Percent

    overpressure

    Cor

    rect

    ion

    Fact

    orK

    p

    NOTE The curve above shows that up to and including 25% overpressure,capacity is affected by the change in lift, the change in the orificedischarge

    coefficient,

    and

    the

    change

    in

    overpressure.

    Above

    25%,capacity

    is

    affected

    only

    by

    the

    change

    in

    overpressure.

    Noncertifiedvalves

    operating

    at

    low

    overpressure

    tend

    to

    chatter;

    therefore,overpressure

    of

    less

    than

    10%

    should

    be

    avoided.

    FIGURE 4 - CAPACITY CORRECTION FACTORS DUE TO OVER PRESSURE FOR NON CERTIFIED PRVS IN SERVICE

    23

  • TABLE 2 - PROPERTIES OF GASES

    TABLE 1 - SUPERHEAT CORRECTION FACTORS, KSH

    24

  • 0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

    Ideal Gas Specific Heat Ratio, k

    1.300

    320

    340

    360

    380

    400

    420

    C

    oeffi

    cien

    t, C

    0 5 10 15 20 25 30 35 40 45 500.50

    0.55

    0.60

    0.65

    0.70

    0.75

    0.80

    0.85

    0.90

    0.95

    1.00

    Precent of Pressure = (P / P ) x 100B S

    Bac

    k pr

    essu

    re C

    orre

    ctio

    n Fa

    ctor

    Kb

    P = backpressure. in psigBP = set pressure. in psigSFor Set pressure above 50 psig. For 21% overpressure, K =1 up to P /P = 50%.b B S

    CURVE FOR EVALUATING COEFFICIENT C

    FIGURE 1 - BACK PRESSURE CORRECTION FACTOR, K , FOR BBALANCE SPRING-LOADED PRV

    16% Overpressure

    10% Overpressure

    25

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    41424344451617181950515253545556575859606162636465666768697071727374757677787980

    91.04121.39182.09242.78303.48364.18424.87485.57546.26606.96667.66728.35789.05849.74910.44917.14

    1031.831092.531153.221213.921274.621335.311396.011456.701517.401578.101638.791699.491760.181820.881881.581942.272002.272063.662124.362185.062245.752306.452367.142427.84

    2488.542549.232609.932670.622731.32971.14

    1031.831092.531153.223034.803095.503156.193216.893277.583328.283398.983459.673520.373581.063641.763702.463763.153823.853884.543945.244005.944066.634127.334188.024248.724309.424370.114430.814491.504552.204612.904673.594734.294794.984855.68

    Pressure PressureCapacity CapacityBar A Bar Akg / hr kg / hr

    Pressure PressureCapacity CapacityBar A Bar Akg / hr kg / hr

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    41424344451617181950515253545556575859606162636465666768697071727374757677787980

    51.0968.12

    102.18136.24170.30204.36238.43272.49306.55340.61374.67408.73442.79476.85510.91544.97579.03613.09647.16681.22715.28749.34783.40817.46851.52885.58919.64953.70987.76

    1021.821055.881089.951124.011158.071192.171226.191260.251294.311328.371362.43

    1396.491430.551464.611498.681532.74544.74579.03613.09647.16

    1703.041737.101771.161805.221839.281873.341907.401941.471975.532009.592043.652077.712111.772145.832179.892213.952248.012282.072316.132350.202384.262418.322452.382486.442520.502554.562588.622622.682656.742690.802724.86

    26

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    41424344451617181950515253545556575859606162636465666768697071727374757677787980

    PressureBar A

    142.60190.14285.21380.28475.34570.41665.48760.55855.62950.69

    1045.761140.831235.891330.961426.031521.101616.171711.241806.311901.381986.442091.512186.582281.652376.722471.792566.862661.932557.002852.062947.133042.203137.273232.343227.413422.413517553612.613707.683802.75

    Capacitykg / hr

    3897.823992.894087.964183.034278.101521.101616.171711.241806.314753.444848.514943.585038.655133.725228.785323.85

    5418.9275513.995609.065704.135799.205894.275989.336084.406179.476274.546369.616464.686559.756654.826749.886844.956940.027035.097130.167225.237320.307415.377510.447605.50

    Capacitykg / hr

    2 2 2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    233.65311.53467.53623.06778.82934.59

    1090.351246.121401.881557.651713.411869.182024.942180.712336.472492.242648.002803.772959.533115.303271.063426.833582.593738.363894.124049.884205.654361.414517.184672.944828.714984.475140.245296.005451.775607.535763.305919.066074.836230.59

    Capacitykg / hr

    Pressure

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    Bar A

    6386.366542.126697.896856.657009.422792.242648.002803.772959.537788.247944.008099.778255.538411.308567.068722.838878.599034.369190.129345.899501.659657.429813.189968.9510124.7110280.4810436.2410592.0110747.7710903.5411059.3011215.0711370.8311526.6011682.3611838.1211993.8912149.6512305.4212461.18

    Capacitykg / hr

    27

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    597.83797.11

    1195.661594.211992.772391.322789.883188.433586.983985.544384.094782.645181.205579.755978.306376.866775.417173.967572.527971.078369.638768.189166.739565.299963.84

    10362.3910760.9511159.5011558.0511956.6112355.1612753.7213152.2713550.8213949.3814347.9314746.4815145.0415543.5915942.14

    Capacitykg / hr

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    PressureBar A

    16340.7016739.2517137.8017536.3617934.916376.866775.417173.967572.52

    19927.6820326.2320724.7921123.3421521.8921920.4522319.0022717.5623116.1123514.6623913.2224311.7724710.3225108.8825507.4325905.9826304.5426703.0927101.6427500.2027898.7528297.3128695.8629094.4129492.9729891.5230290.0730688.6331087.1831485.7331884.29

    Capacitykg / hr

    2 22 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    PressureBar A

    364.64486.19729.29972.38

    1215.481458.581701.671944.772187.862430.962674.062917.153160.253403.343646.443889.544132.634375.734618.824861.925105.025348.115591.215834.306077.406320.506563.596806.697049.787292.887535.987779.078022.178265.268508.368751.468994.559237.659480.749723.84

    Capacitykg / hr

    9966.9410210.0310453.1310696.2210939.323889.544132.634375.734618.82

    12154.8012397.9012640.9912884.0913127.1813370.2813613.3813856.4714099.5714342.6614585.7614828.8615071.9515315.0515558.1415801.2416044.3416287.4316530.5316773.6217016.7217259.8217502.9117746.0117989.1018232.2018475.3018718.3918961.4919204.5819447.68

    Capacitykg / hr

    28

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    PressureBar A

    1325.251467.002650.513534.014417.515301.016184.527068.027951.528835.029718.53

    10602.0311485.5312369.0313252.5414136.0415019.5415903.0416786.5517670.0518553.5519437.0520320.5621204.0622087.5622971.0623854.5624738.0725621.5726505.0727388.5728272.0829155.5830039.0830922.5831806.0932689.5933573.0934456.5935340.10

    Capacitykg / hr

    36223.6037107.1037990.6038874.1139757.6114136.0415019.5415903.0416786.5544175.1245058.6245942.1246825.6347709.1348592.6349476.1350359.6451243.1452126.6453010.1453893.6554777.1555660.6556544.1557427.6658311.1659194.6660078.1660961.6761845.1762728.6763612.1464495.6865379.1866262.6867146.1868029.6868913.1969796.6970680.19

    Capacitykg / hr

    2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    853.781138.371707.552276.742845.923415.103984.294553.475122.665691.846261.026830.217399.397968.588537.769106.949676.13

    10245.3110814.5011383.6811952.8612522.0513091.2313660.4214229.6014798.7815367.9715937.1516506.3417075.5217644.7018213.8918783.0719352.2619921.4420490.6221059.8121628.9922198.1822767.36

    23336.5423905.7324474.9125044.1025613.289106.949676.13

    10245.3110814.5028459.2029028.3829597.5730166.7530735.9431305.1231874.3032443.4933012.6733581.8634151.0434720.2235289.4135858.5936427.7836996.9637566.1438135.3338704.5139273.7039842.8840412.0640981.2541550.4342119.6242688.8043257.9843827.1744396.3544965.5445534.72

    Pressure PressureCapacity CapacityBar A Bar Akg / hr kg / hr

    29

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    414243444546474849505152535455565758596061626364656667686970

    2015.992687.994031.995375.986719.988063.979407.97

    10751.9612095.9613439.9514783.9516127.9417471.9418815.9320159.9321503.9222847.9224191.9125535.9126879.9028223.9029567.8930911.8932255.8833599.8834943.8836287.8737631.8738975.8640319.8641663.8543007.8544351.8445695.8447039.8348383.8349727.8251071.8252415.8153759.81

    55103.8056447.8057791.7959135.7960479.7821503.9222847.9224191.9125535.9167199.7668543.7669887.7571231.7572575.7473919.7475263.7376607.7377951.7279295.7280639.7181983.7183327.7084671.7086015.6987359.6988703.6890047.6891391.6792735.6794079.66

    Pressure PressureCapacity CapacityBar A Bar Akg / hr kg / hr

    2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    414243444546474849505152535455565758596061626364656667686970717273747576

    1672.252229.673344.504459.335574.176689.007803.848918.67

    10033.5011148.3412263.1713378.0014492.8415607.6716722.5017837.3418952.1720067.0021181.8422296.6723411.5125526.3425641.1726759.0127870.8428985.6730100.5131215.3432330.1733445.0134559.8435674.6836789.5137004.3439019.1840134.0141248.8442363.6843478.5144593.34

    45708.1846823.0147937.8449052.6850167.5117837.3418952.1720067.0021181.8455741.6856856.5157971.3559086.1860201.0161315.8562430.6863545.5264660.3565775.1866890.0268004.8569119.6870234.5271349.3572464.1873579.0274693.8575808.6876923.5278038.3579153.1980268.0281382.8582497.6983612.5284727.35

    Pressure PressureCapacity CapacityBar A Bar Akg / hr kg / hr

    30

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    2 2

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    4142

    PressureBar A

    5132.896843.85

    10265.7713687.7017109.6220531.5523953.4727375.4030797.3234219.2537641.1741063.1044485.0247906.9551328.8754750.8058172.7261594.6565016.5768438.5071860.4275282.3578704.2782126.2085548.1288970.0492391.9795813.8999235.82

    102657.74106079.67109501.59112923.52116345.44119768.37123189.29126611.22130033.14133455.07136876.99

    Capacitykg / hr

    140298.92143720.84

    Capacitykg / hr

    1.523456789

    10111213141516171819202122232425262728293031323334353637383940

    PressureBar A

    Pressure

    414243444546474849505152535455565758596061626364656667686970

    Bar A

    2963.603951.475927.207902.939878.66

    11857.4013830.1315805.8617781.6019757.3321733.0623708.7925684.5327660.2629635.9931611.7233587.4635563.1937538.9239514.6641490.3943466.1245441.8547417.5949393.3251369.0553344.7955320.5257296.2559271.8961247.7263223.4565199.1867174.9269150.6571126.3873102.1175077.8577053.5879029.31

    Capacitykg / hr

    2 2

    81005.0482980.7884956.5186932.2488907.9831611.7235587.4635563.1937538.9298786.64

    100762.37102738.11104713.84106689.57108665.30110641.04112616.77114592.50116568.24118543.97120519.70122495.43124471.17126446.90128422.63130398.36132374.10134349.83136325.56138301.30

    Capacitykg / hr

    31

  • 0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    2 2: 16774.16 mm

    12077.4016103.1924154.7932206.3940257.9848309.5856361.1864412.7772464.3780515.9788567.5696619.16

    104670.76112722.36120773.95128825.55136877.15144928.74152980.34161031.94169083.53

    Capacity

    1.523456789

    101112131415161718192021

    PressureBar A

    PressureBar Akg / hr

    Capacitykg / hr

    2 2: 10322.55 mm

    1.523456789

    101112131415161718192021

    PressureBar A

    PressureBar A

    7432.249909.65

    14864.4719819.3024774.1229728.9434683.7739638.5944593.4249548.2454503.0659457.8964412.7169367.5474322.3679277.1884232.0189186.8394141.6699096.48

    104051.30

    Capacitykg / hr

    Capacitykg / hr

    32

  • SAFETY VALVE DISCHARGE CAPACITY SATURATED STEAM

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    139278416555694833972

    111012491388166619432221249827763054333136093886416144414719499752745552852961076385666269407217749577738050832886058883916194389716

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    9993102711054810826111041138111659119361221412492127691304713324136021388014157144351471214990152681554515823161001637816655169331721117488177661804318321185991887619154194311970919987202642054220819

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    78156234312389467545623701779935

    10911246140215581714186920252181233724932648280429603116327234273583373938954051420643624518467448304985514152975453

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    560857645920607662326387654366996855701

    7166732274787634779079458101825784138569872

    88809036919293479205965998159971

    1012610282104381059410750109051106111017113731152911684

    Capacitylb / hr

    Capacitylb / hr

    33

  • 2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    217435652870

    10871304152217391957217426093044347839134348478352185652608765226957392

    78268261869691319566

    10000104351087011305117401217412609130441347913914143481478315218

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    1563516088165221695717392178271826218696191311956

    200012043620870213052174022175226102304423479239142434924784252182565326088265232695827392278272826228697291322956630001304363087131306317403217532610

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    356712

    10691425178121372493285032063562427449875699641271247836854992619973

    106861139812111128231353514248149601567316385170971781018522192351994720659213722208422796235092422124934

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    256462658

    2707127783284962920829920306333134532058327703348234195349073562036332370443775738469391813989440606413194203142743434564416844881455934630547018477304844349155498675058051292520045271753429

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    34

  • 2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680

    Pressurepsia

    Pressurepsia

    556111216682224277933353891444750035559667177828894

    1000611118122301334114453155651667717789189002001221124222362334724459255712668327795289053001831130322423335334465355773668937801

    720740760780800820840860880900920940960980

    1000102010401060108011001120114011601180120012201240126012801300132013401360138014001420144014601480

    4002441136422484335944471455834669547807489185003051142522545336654477555895670157813589246003661148622606337264483655956670

    6781968930700427115472266733787448945601767137782578936800488116082272

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680

    Pressurepsia

    Pressurepsia

    911182327343646455754686380729182029114

    1093712759145821640518228200502187323696255192734129164309873281034632364553827840101419234374645569473924921451037528605468356505583286015161974

    720740760780800820840860880900920940960980

    1000102010401060108011001120114011601180120012201240126012801300132013401360138014001420144014601480

    Capacitylb / hr

    Capacitylb / hr

    65619674426926571087729107473376556783788020182024838478567087492893159113892961847839660698429

    100252102074103897105720107543109365111188113011114834116656118479120302122125123947125770127593129416131238133061134884

    35

  • 2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    1302260339055206650878099111

    104131171413016156191822220825234282603128634312383384136444390474165044253468564945952063546665726959872624756507867681702847288875491780948069783300859038850691109

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    937139631698919

    101522104125106728109331111934114538117141119744122347124950127553130156132759135363137966140569143172145775148378150981153584156188158791161394163997166600169203171806174410177013179616182219184822187425190028192631195235

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    2020404160618081

    10102121221414216163181832020324244282853232536366404074447

    484885252856569606106465

    6869172732767728081384854888949293596976

    101016105057109098113138117179121220125260129301133342137382141423

    720740760780800820840860880900920940960980

    10001020104010601080110011201140116011801200122012401260128013001320134013601380140014201440146014801500

    14546414950415354515758516162616566716970717374817778918182918587018991119395119799220203320673

    210114214155218195222236226277230317234358238399242439246480250521254561258602262642266683270724274764278805282846286886290927294968299008303049

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    36

  • 2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    254950997648

    101971274715296178452039422944254933059235690407894588850986560856118366282713817647981578866769177596874

    101922107071112170117268122367127465

    12\32564137633142761147860152958158057163156168254173353178452

    720740760780800820840860880900920940960980

    100010201040106010801100

    183550188349193747198846203945209043214142219241224339229438234536239635244734249832254931260029265128270227275325280424

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    307361479220

    122931536718440215132458727660307333688043027491735532061467676137376079907860539220098347

    104493110640116787122933129080135227141273177520153667159813165960172107178253184400190547196693202840208987215133

    720740760780800820840860880900920940960980

    1000

    221280227427233573239720245867252013258160264307270453276600282747288893295040301187307333

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    37

  • 2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600620640660680700

    Pressurepsia

    Pressurepsia

    45189036

    1355418072225902710831626361444066145179542156325172287813239035999395

    108431117466126502135538144574153610162646171682180718189754198789207825216861225897234933243969253005262041271076280112289148298184307220316256

    720740760780800820840860880900920940960980

    1000

    325292334328343364352399361435370471379507388547397579406615415651424686433722442758451794

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300320340360380400420440460480500520540560580600

    Pressurepsia

    Pressurepsia

    782515650234753130039125469505477562600704257825093900

    109549125199140849156499172149187799203449219099234749250399266049281299297348312998328648344298359948375598391248406898422548438198453848469498

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    38

  • 2 2

    102030405060708090

    100120140160180200220240260280300

    Pressurepsia

    Pressurepsia

    1133022661339914532156651679827931290642

    101972113303135963158624181284203945226605249266271926294587317247339908

    Capacitylb / hr

    Capacitylb / hr

    2 2

    102030405060708090

    100120140160180200220240260280300

    Pressurepsia

    Pressurepsia

    1841236823552357364792058

    110470128882147293165705184117220940257763294587331410368233405057441880478703515527552350

    Capacitylb / hr

    Capacitylb / hr

    0SAFETY VALVE DISCHARGE CAPACITY AIR AT 30 C

    39

  • Range of Products

    Dump tube

    evlav ssapyB PL evlav ssapyB PHfor 660 MW power plant

    Spray water controlvalve for 660 mw

    Minimum flow re-circulation valve

    Desuperheater-integralmultinozzle type


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