ANDERSON GREENWOOD - carrcoltd€¦ · Anderson Greenwood pilot operated valves will not increase in set pressure or lose lift due to back pressure, ... pilot seat lifts slightly,
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Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Features and Benefits• Tight Up to Set Pressure: Pilot control keeps high seat forces all the way to set point, helping eliminate product losses.
• Full Open at Set Point: Snap action opening permits fullopening at set pressure, allowing for higher settings and overcomingfreezing or sticking problems.
• Pop or Modulating Action: Pilot selection allows a choicebetween rapid snap opening actionand proportional modulating action to best suit the process.
• Resilient Seats and Diaphragms:Extensive selection of seat anddiaphragm materials to meet mostconditions and provide long maintenance-free operation.
• Balanced Against Back Pressure:Valves can be connected to closedheader systems without loss of valvelift or set pressure fluctuations.
• Remote Sensing: This option permits the pressure inthe protected system to be accuratelysensed at the PRV regardless of the inlet piping pressure losses to the PRV.
• Field Test Connection: Valve function can be verified in placewithout removing the valve to a testbench or raising process pressures.
• Manual Blowdown: The valve can be actuated manuallyor remotely to depressurize a system.
ANDERSONGREENWOOD
Series 90 and 9000 valves offer a high performancealternative to spring and weight-loaded relief devicesfor low pressure systems.
Anderson Greenwood is either a trademark or registered trademark of Tyco International Services AG or its affiliates in the United States and/or other countries. All other brand names, product names, or trademarksbelong to their respective holders.
Flow Control
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Product Overview 2
Function Low Pressure POPRV 2-3
Operation Series 90 4-5 Series 9000 6-7 Type 96A Vacuum Breaker 8
General Technical Data 9
Model Selection 10-16
Product Detail Type 93 17 Types 91 and 94 18 Type 95 19 Type 9200 20 Type 9300 21 Series 90 Pilot 22-23 Series 400 Pilot 24 Type 96A 25
Accessories and Options 26-29
Dimensions and Weights Types 93, 91 and 94, 95 30 Types 9200, 9300 31-32 Type 96A 32
Sizing 33-38
Capacity Tables 39-50
Ordering Information 51-52
Product OverviewThe Series 90 and 9000 group of productsis a very wide range of both pressure andvacuum relief valves, primarily designedfor protecting low pressure storage vesselsand tanks, as well as low pressure pipingsystems. They are designed to meet therequirements of ASME VIII and API 2000;many models also satisfy IMO and othermarine regulations.
Type 93: The Type 93 is the originalworkhorse of the product range, providingexcellent service since 1968. This pilotoperated pressure relief valve is designedwith elastomer seats and seals, withconstruction materials in aluminum,carbon steel (CS) and stainless steel (SS)to satisfy the majority of gas piping andchemical tank applications.
Types 91 and 94: The Types 91 and 94were designed for specific applicationswhere FEP diaphragms alone were notrugged enough and premium sealing wasrequired for super cryogenic fluids. The Types 91 and 94 employ a bellowscoupled with a Teflon® film seat to provideextraordinary performance for hard-to-hold
cryogenic fluids such as hydrogen andhelium. They also satisfy specific marineapplications.
Type 95: The Type 95 is a unique higherpressure protection valve that utilizes apiston in the main valve for ruggedness, andhigh performance elastomers, making thisvalve ideal for special applications up to 150psig [10.34barg] inmarineLPGservices.
Type 96A: All of the above valves are pilotoperated pressure relief valves. The Type96A is a weight-loaded vacuum breakerdesigned to compliment the pressure reliefproducts.
Types 9200 and 9300: The Types 9200and 9300were designed in 1986 to expandupon the capabilities of the Series 90product range. The Types 9200 and 9300employ the highly successful pressurizedTeflon® film seat, as well as protected FEPdiaphragms. The designs allow thesevalves to be used in the pilot operatedpressure relief mode and simultaneouslyprovide vacuum relief, either via weightloads of the internals, or with a specificpilot control of the vacuum opening. TheTypes 9200 and 9300 were designed witha special studded inlet connection toreduce the inlet profile, and coupled withlarger orifice areas, these valves provideflow capacities as much as 45 percentgreater than the Series 90 valves. The Type 9300 is a full body valve to pipe awaythe discharge if required. The 9200 ventsdirectly to atmosphere and has no provision to pipe away the discharge.
Contents
Function – Low PressurePOPRVLow pressure systems can be protectedfrom overpressure by spring-operatedvalves, weight-loaded valves or pilotoperated valves.
Full Open at Set PressureWeight-loaded and spring-operated valvesbegin to open when forces are inequilibrium. As process pressuresapproach set pressures, there can besignificant simmer or leakage and loss ofproduct. Long periods of simmer can leadto valve freeze-up with cryogenic fluids.Very small differential forces don’t easilyovercome sticky fluids and prevent properopening. Typical weight-loaded valvesrequire significant overpressure to achieverated capacities (see Figure 1).
NOTE: The application of the 90 and 9000Series flowing style pilot operated pressurerelief valves in condensable gas service(ie: n-Butane, Isobutane or Butadiene) withoperating fluid saturation temperatures thatfall within the expected ambient temperatureextremes require special consideration toassure the valve temperature remainsabove the operating fluid saturation temperature. Please contact your salesrepresentative to review all applicationswhich fall within this categorization.
Pilot operated valves use a pilot to controlpressure over a large unbalanced memberin the main valve, such as a diaphragm or piston (see Figure 2). The largeoverbalance means a much larger force on top of the seat compared to processforces pushing up on the seat. At setpressure, the pilot relieves the pressurequickly, permitting the main valve seat toopen rapidly. The Anderson GreenwoodSeries 90 and 9000 designs can providefull openingwithout any overpressure, acapability unavailable in spring-operatedand weight-loaded valves in low pressuresystems.
This same feature can be applied to theAnderson Greenwood Series 9000 forvacuum, allowing tight sealing operation ina vacuum mode until such point where thevalve must rapidly open to prevent excessvacuum.
Snap Action or Modulating Action OpeningWeight-loaded and spring-operated valvesopen as process forces overcomedownward forces, with little flexibility toovercome problem applications. AndersonGreenwood pilot operated valves can beadjusted to openwith a rapid “snap” actionor modulating action. Most applications arewell served by the snap action mode, withfull opening at set pressure and fullreseating after a short blowdown. However,some systems might best be served by aproportional opening, whereby the valveopens just enough to satisfy small upsetsand maintain constant system pressure,yet still have the capability to reach fullcapacity within 10 percent overpressure.The Anderson Greenwood Series 90 and9000 can be set for a snap acting ormodulating mode with a simple adjustmentof the external blowdown screw. No partchanges are necessary to change theoperating mode.
Large Selection of ModelsThe Series 90 and 9000 valves are offeredin a wide variety of sizes, materials andconfigurations to meet most applicationsfor positive pressure and vacuumprotection. Anderson Greenwood has
decades of experience in cryogenic,industrial, and chemical applications. Each application benefits from the samefeatures of leak-free operation, balancedagainst back pressure, as well as preciseand repeatable opening.
Leak-Free OperationWeight-loaded and spring-operated valveshave decreasing seating forces as setpressure is approached. This leads tosignificant leakage of valuable productprior to set point. With the AndersonGreenwood pilot operated valves, thegreater the system pressure, the higherthe seating force, until set point is reachedand the valve opens.
This provides superior leak-free operation,minimizing product loss. Figure 3illustrates the relative seating forces of thevalve types.
Balanced Against Back PressureLow-pressure weight-loaded and spring-operated valves are directly affected by anyback pressures, built-up or superimposed.Therefore, any vent piping or closed headersystem can adversely affect the openingand capacities of these valves. Such valvesshould not be used when discharging intoclosed header systems. Figure 4 illustratesa typical weight-loaded design, where anyback pressures will directly increase theopening pressure of such designs, or addto premature closing and instability.Anderson Greenwood pilot operated valveswill not increase in set pressure or lose liftdue to back pressure, as they are inherentlybalanced against back pressures.
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Figure 5(Closed)Positive Pressure ReliefUnder normal operating conditions, systempressure acts on the bottom of the mainvalve seat, on top of the main valve diaphragm, and on the pilot diaphragms.The main valve seat is held tightly closedby a large force equal to the system pressure times the unbalanced area of themain valve diaphragm.
System pressure is also applied to theboost cavity and the sense cavity downstream of the variable orifice.
The soft pilot seat is held closed as thepilot spring load is greater than the upwardforces acting on the sense diaphragm.
Spindle Seal Diaphragm
Sense Diaphragm
Pilot Spring
Boost Diaphragm
Sense Cavity
Boost Cavity
Pilot Seat
Blowdown AdjustmentOrifice (variable)
Main Valve Diaphragm
Fixed Orifice
Dome
Main Valve Seat
Pilot Pickup(total pressure)
System Pressure
Exhaust Pressure
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Figure 6(Pilot Open)Positive Pressure ReliefWhen process pressure increases to thepoint where the upward force on the sensediaphragm exceeds the spring load, thepilot seat lifts slightly, setting up a smallflow in the pilot sense line. This small flow across the blowdown adjustment orifice causes a reduction in pressuredownstream of the orifice and in the sensecavity. Even though this is only a small reduction in pressure, it creates a large netupward force which snaps the pilot fullopen as shown in Figure 7.
Figure 7(Open and Flowing)Positive Pressure ReliefWith the pilot fully open, a large reductionin pressure on top of the main valve diaphragm occurs, resulting in full lift of themain valve seat. Set pressure is where themain valve opens.
Flow through the main valve continues untilsystem pressure has been reduced to thepoint where the pilot spring is again able toovercome the lifting forces on the boost diaphragm. As the pilot begins to close, the flow and pressure drop across theblowdown adjustment and orificedecreases. The sense cavity pressure now increases to assist in an acceleratedclosing rate.
With the pilot closed, full line pressureagain loads the dome area, the main valve seat closes, and the pressures return to those shown in Figure 5.
The point at which the pilot springovercomes the net lifting forces on theboost diaphragm may be varied bychanging the pressure drop across thevariable blowdown adjustment orifice. Asmaller orifice adjustment makes the valveclose at a lower system pressure (longerblowdown). A larger orifice adjustmentmakes the valve open and close in aproportional/ modulating mode.
Operation – Series 90
Intermediate Pressure
Exhaust Pressure
System Pressure
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Operation – Series 9000 (Positive Pressure Relief)2
Figure 8 Positive Pressure Relief2
The Series 9000 group of productsoperates very similarly to the Series 90group of valves. The Series 90 pilot iswidely used with the Series 9000 valves,available in both “snap” and “modulating”actions (see Figures 5 - 7). The maindifference is the main valve diaphragmsare fully supported by the surroundingcases and diaphragm plates, increasingthe pressure ranges of the Teflon®
diaphragms and permitting vacuumoperations. The main valve seat is a highperformance Teflon® film seat which isextended from the main valve diaphragmsto a lower profile nozzle, which permitsgreater flow capacities at set pressure.
Figure 9 Positive Pressure ReliefWhen process pressure increases to thepoint at which the upward force on thesense diaphragm exceeds the pilot springload, the pilot seat lifts and begins the flowthrough the pilot. The flow across theblowdown adjustment orifice can be set torapidly reduce the main valve domepressure for a “snap” action, or slowlyreduce the main valve dome pressure for a “modulating” action.1
Figure 10 Positive Pressure Relief• With the pilot open, the dome pressureis sufficiently reduced and the forcesunder the main valve seat lift the seatplate and begin to relieve system pressure.
• Flow through the main valve continuesuntil system pressure has been reducedenough so the pilot spring is again ableto overcome the lifting forces on theboost diaphragm.
• As the pilot begins to close, the flow andpressure drop across the blowdownadjustment orifice decreases.
• The sense cavity pressure then increasesto assist in an accelerated closing rate.
• With the pilot closed, full line pressureagain loads the dome area and the mainvalve seat closes. Pressures return tothose shown in Figure 8.
• A non-flowing modulating pilot, Series400, is available for special applications.
Figure 9 (Pilot Open) Figure 10 (Open and Flowing)
Figure 11 Weight LoadedVacuum ReliefWeight loaded vacuum relief is most typicalfor economical vacuum protection incombination with a pilot operated pressurerelief valve.
• The same valve which is held tightlyclosed on positive pressure opens onvacuum based on the weight of internalcomponents.
Figure 12 Weight Loaded Vacuum Relief• Vacuum in the protected vessel pulls upon one or two dome areas while externalatmosphere pushes upwards on thediaphragms to lift the seat plates.
• Vacuum opening pressures depend on valve internals and number of diaphragm chambers used.
Figure 13 Vacuum ReliefPilot OperatedPilot operated vacuum relief operation isbasically the same as positive pressurerelief operation, as follows:
• A seating force is established by loadingthe large dome area with a pressuregreater than the inlet pressure under the seat.
• In the closed condition, atmosphericpressure is present in the dome area ofthe main valve and a vacuum is presentat the inlet. This causes a net force thatcloses the seat and maintains tightnessup to set point.
• At set point, the vacuum pulls againstthe spring force, and the pilot valveopens, evacuating the dome pressurethrough the supply tube into the inletvacuum.
Figure 14 Vacuum ReliefPilot Operated• With a partial vacuum established in the dome, atmospheric pressure forcesthe diaphragm and seat to open andestablishes air flow into the valve. Thisrelieves the system vacuum.
• When the pilot reseats, the supply line isclosed by the pilot seat.
• Atmospheric pressure again fills thedome through the blowdown adjustmentand fixed orifice, which closes the mainvalve.
Operation – Series 9000 (Vacuum Relief)2, 3
1. The point at which the pilot spring overcomesthe net lifting forces on the boost diaphragmcan be varied by changing the pressure dropacross the variable blowdown adjustmentorifice. A smaller orifice adjustment makesthe valve close at a lower system pressure(longer blowdown).
2. With either pressure or vacuum configurationalone, the valve will open and flow when theweight-loaded pressure or vacuum for theopposite condition is exceeded unless abackflow preventer is installed.
3. Remote pressure sense required.
Notes
Figure 14 (Open and Flowing)Figure 13 (Closed)
Figure 11 (Closed) Figure 12 (Open and Flowing)
Exhaust PressureSystem Pressure
Inlet
Pilot Pickup (total pressure)
Inlet
Pilot Pickup (system vacuum)
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Valve ClosedThe weight of the pallet and any positiveinternal tank pressure holds the valveclosed.
Valve Open and FlowingThe tank vacuum creates a pressuredifferential great enough to overcome theweight of the pallet and the pallet is lifted tothe open position.
Atmospheric Pressure
PressureTank
Retainer Bolts
Seat Ring Retainer
O-ring Seat
Inlet ScreenSeat Ring
Sponge Seat
Seat Plate
Guide TubeBody
Guide RodLifting Eye Bolt
Inlet To Relief Valve Gasket Flange Stud
Flange NutFlange Cap
Tank Connection
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. Not all valve sizes are available for service atextreme limits of both temperature andpressure simultaneously. Please consult yoursales representative when “at limits” toconfirm suitability of selected valve.
2. Maximum temperature ratings for Series 90Soft Goods: This is only a guide sincepressure and fluid compatibility will alsoaffect valve selection. See Series 90Temperature Ratings table. For ASME coderequirements, the maximum temperature foraluminum is 250°F [121°C].
3. BUNA-N O-ring main valve seat is rated to -260°F [-162°C] in conjunction with Teflon®
diaphragm.
4. Kalrez®, Viton® and Teflon® are registeredtrademarks of E.I. duPont de NemoursCompany.
5. Hastelloy® is a registered trademark ofHaynes International.
6. Minimum temperature for CS is -20°F [-29°C].
7. Contact your sales representative for 90 or 9000 Series product recommendationswhen the boiling point of the lading fluid is in between the minimum and maximumexpected ambient temperatures.
General Technical Data – Refer to Model Selection Tables for Specific Pressure Limitation
Series 90 Temperature Ratings
BUNA-N3 -65°F to 250°F
[-54°C to 121°C]
-65°F to 300°F Viton®
[-54°C to 149°C]
EPR -65°F to 250°F
[-54°C to 121°C]
Teflon® Film seat and seals
-423°F to 200°F
(Types 91 and 94) [-253°C to 93°C]
Series 901,7
Valve Type Pressure Relief Valves Vacuum Breaker Type 93 Type 91 Type 94 Type 95 Type 96A
Materials AL, CS6, SS AL or SS AL or SS SS AL, CS6, SS
Elastomer or Teflon®
Main Valve
Diaphragm, Rubber SS Bellows
SS Bellows
Kalrez® Seat
Elastomer Seat
Soft Goods
Seat and Seals Teflon® Seat and Seals
Teflon® Seat and Seals
Teflon® Seals
and Seals
Pilot
Elastomer or Teflon® SS Diaphragms Teflon® Diaphragm
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Minimumset pressure with accessories is 5 inches wc[12.4 mbarg] or minimum stated above,whichever is greater. Consult with salesoffice for verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Standard Aluminum valves are manufacturedwith flat faced flange finish in accordancewith commercial practice. The flanges aredesignated as Class 150 FF, with drillingequal to ANSI Class 150. Standard CS andSS valves are manufactured with ANSI Class150 RF (spiral serrated, raised face, unlessotherwise specified). Special facings, drillingand surface finishes are available uponrequest.
4. At this pressure and below, a sponge-designseat is utilized in the main valve. Above thispressure, an O-ring design seat is utilized.
Notes
Type 93
Main Valve Size Valve Body Minimum1 Sponge Seat4 Maximum1
Inlet x Outlet Orifice Area Material2,3 Set Pressure O-ring Seat Set Pressure in [mm] in2 [cm2] in wc [mbarg] psig [mbarg] psig [barg]
AL 2 [5.0] 2.5 [170] 50.0 [3.45] 2 x 3 [50 x 80]
2.29 [14.77] CS 2 [5.0] 2.5 [170] 50.0 [3.45]
SS 2 [5.0] 2.5 [170] 50.0 [3.45]
AL 2 [5.0] 1.5 [103] 50.0 [3.45]
3 x 4 [80 x 100]
5.16 [33.29] CS 2 [5.0] 1.5 [103] 50.0 [3.45]
SS 2 [5.0] 1.5 [103] 50.0 [3.45]
AL 2 [5.0] 1.0 [69] 50.0 [3.45] 4 x 6 [100 x 150]
8.74 [56.39] CS 2 [5.0] 1.0 [69] 50.0 [3.45]
SS 2 [5.0] 1.0 [69] 50.0 [3.45]
AL 2 [5.0] 1.0 [69] 50.0 [3.45]
6 x 8 [150 x 200 ] 19.56 [126.19] CS 2 [5.0] 1.0 [69] 50.0 [3.45]
SS 2 [5.0] 1.0 [69] 50.0 [3.45]
AL 2 [5.0] 1.0 [69] 50.0 [3.45] 8 x 10 [200 x 250]
36.40 [234.84] CS 2 [5.0] 1.0 [69] 50.0 [3.45]
SS 2 [5.0] 1.0 [69] 50.0 [3.45]
AL 2 [5.0] 1.0 [69] 30.0 [2.07]
10 x 12 [250 x 300] 51.00 [329.03] CS 2 [5.0] 1.0 [69] 30.0 [2.07]
SS 2 [5.0] 1.0 [69] 30.0 [2.07]
AL 2 [5.0] 1.0 [69] 30.0 [2.07]12 x 16 [300 x 400]
84.00 [541.93] CS 2 [5.0] 1.0 [69] 30.0 [2.07]
SS 2 [5.0] 1.0 [69] 30.0 [2.07]
Model Selection Overview
Valve Size Orifice Area Inlet x Outlet Type 93 Types 91 and 94 Type 95 Types 9200 and 9300 in [mm] in2 [cm2] in2 [cm2] in2 [cm2] in2 [cm2]
2 x 3 [50 x 80 ] 2.29 [14.77] 2.92 [18.84] 2.93 [18.90] 3.35 [21.61]
3 x 4 [80 x 100 ] 5.16 [33.29] 6.24 [40.26] 6.25 [40.32] 7.39 [47.68]
4 x 6 [100 x 150 ] 8.74 [56.39] 10.33 [66.65] 10.32 [66.58] 12.73 [82.13]
6 x 8 [150 x 200 ] 19.56 [126.19] 22.22 [143.35] 22.15 [142.90] 28.89 [186.39]
8 x 10 [200 x 250 ] 36.40 [234.84] 39.57 [255.29] 50.00 [322.58]
10 x 12 [250 x 300 ] 51.00 [329.03] 56.50 [364.52] 78.85 [508.71]
12 x 16 [300 x 400 ] 84.00 [541.93] 89.87 [579.81] 113.00 [729.03]
Model Selection
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
2. SS valves are standard with ANSI Class 150RF (spiral serrated, raised face, unlessotherwise specified). Special facings, drillingand surface finishes are available uponrequest.
Type 95
Main Valve Size Valve Minimum Maximum Inlet x Outlet Orifice Area Body Set Pressure Set Pressure in [mm] in2 [cm2] Material1,2 psig [barg] psig [barg]
2 x 3 2.93 [50 x 80] [18.90]
SS 10.00 [0.690] 150 [10.3]
3 x 4 6.25
[80 x 100] [40.32] SS 5.00 [0.345] 150 [10.3]
4 x 6 10.32 [100 x 150] [66.58]
SS 5.00 [0.345] 150 [10.3]
6 x 8 22.15
[150 x 200] [142.90 ] SS 5.00 [0.345] 150 [10.3]
Notes
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Consultwith sales office for verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Standard Aluminum valves are manufacturedwith flat faced flange finish in accordancewith commercial practice. The flanges aredesignated as Class 150 FF, with drillingequal to ANSI Class 150. Standard SS valvesare manufactured with ANSI Class 150 RF(spiral serrated, raised face, unless otherwisespecified). Special facings, drilling andsurface finishes are available upon request.
Model Selection
Types 91 and 94
Main Valve Size Valve Body Minimum1 Maximum1
Inlet x Outlet Orifice Area Material2,3 Set Pressure Set Pressurein [mm] in2 [cm2] psig [mbarg] psig [barg]
2 x 3 2.92 AL 1.50 [103] 50.0 [3.45] [50 x 80] [18.84] SS 1.50 [103] 50.0 [3.45]
3 x 4 6.24 AL 1.00 [69] 50.0 [3.45]
[80 x 100] [40.26] SS 1.00 [69] 50.0 [3.45]
4 x 6 10.33 AL 1.00 [69] 50.0 [3.45] [100 x 150] [66.65] SS 1.00 [69] 50.0 [3.45]
6 x 8 22.22 AL 1.00 [69] 50.0 [3.45]
[150 x 200] [143.35] SS 1.00 [69] 50.0 [3.45]
8 x 10 39.57 AL 0.75 [52] 50.0 [3.45] [200 x 250] [255.29] SS 0.75 [52] 50.0 [3.45]
10 x 12 56.50 AL 0.75 [52] 50.0 [3.45]
[250 x 300] [364.52] SS 0.75 [52] 50.0 [3.45]
12 x 16 89.87 AL 0.50 [34] 50.0 [3.45] [300 x 400] [579.81] SS 0.50 [34] 50.0 [3.45]
Notes
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Minimumset pressure with accessories is 5 inches wc[12.4 mbarg] or minimum stated above,whichever is greater. Consult with sales officefor verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Standard Aluminum valves are manufacturedwith flat faced outlet flange finish inaccordance with commercial practice. Theflanges are designated as Class 150 FF, withdrilling equal to ANSI Class 150. StandardCS and SS valves are manufactured withANSI Class 150 RF (smooth, raised face,unless otherwise specified). Special facings,drilling and surface finishes are availableupon request. All inlet flanges must be raisedface.
4. 50 psig [3.45 barg] with SS cap.
5. 30 psig [2.07 barg] with SS cap.
6. Valve body available in AL, CS or SS.
Type 9300, Pressure Only - Pilot Operated (single chamber)
Main Valve Size Valve Trim Minimum1 Maximum1
Inlet x Outlet Orifice Area Material2,3,6 Set Pressure Set Pressure in [mm] in2 [cm2] in wc [mbarg] psig [barg]
AL 6 [14.9] 5 [0.35]
2 x 3 3.35 SS 6 [14.9] 5 [0.35]
[50 x 80] [21.61]
SS 19 [47.3] 50 [3.45]
AL 4 [10.0] 5 [0.35]
3 x 4 7.39
SS 4 [10.0] 5 [0.35]
[80 x 100] [47.68]
SS 11 [27.4] 50 [3.45]
AL 3 [7.5] 5 [0.35]
4 x 6 12.73 SS 5 [12.4] 5 [0.35]
[100 x 150] [82.13]
SS 8 [19.9] 444 [3.03]
AL 3 [7.5] 5 [0.35]
6 x 8 28.89
SS 5 [12.4] 5 [0.35]
[150 x 200] [186.39]
SS 6 [14.9] 254 [1.72]
AL 4 [10.0] 5 [0.35] 8 x 10 50.00
SS 7 [17.4] 5 [0.35]
[200 x 250] [322.58] SS 10 [24.9] 234 [1.59]
AL 4 [10.0] 5 [0.35]
10 x 12 78.85
SS 6 [14.9] 2 [0.14]
[250 x 300] [508.71]
SS 11 [27.4] 145 [0.97]
AL 4 [10.0] 5 [0.35]
12 x 16 113.00 SS 10 [24.9] 2 [0.14]
[300 x 400] [729.03]
SS 17 [42.3] 145 [0.97]
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Minimumset pressure with accessories is 5 inches wc[12.4 mbarg] or minimum stated above,whichever is greater. Consult with sales officefor verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. All standard Type 9200 valves aremanufactured with ANSI Class 150 RF inletflanges (smooth, raised face, unlessotherwise specified). Special facings, drillingand surface finishes are available uponrequest.
Model Selection
Type 9200, Pressure Only - Pilot Operated (single chamber)
Main Valve Size Valve Trim Minimum1 Maximum1
Inlet Orifice Area Material2,3 Set Pressure Set Pressure in [mm] in2 [cm2] in wc [mbarg] psig [barg]
2 Vent 3.35 AL 6 [14.9] 5 [0.35] [50] [21.61] SS 6 [14.9] 5 [0.35]
3 Vent 7.39 AL 4 [10.0] 5 [0.35]
[80] [47.68] SS 4 [10.0] 5 [0.35]
4 Vent 12.73 AL 3 [7.5] 5 [0.35] [100] [82.13] SS 5 [12.4] 5 [0.35]
6 Vent 28.89 AL 3 [7.5] 5 [0.35]
[150] [186.39] SS 5 [12.4] 5 [0.35]
8 Vent 50.00 AL 4 [10.0] 5 [0.35] [200] [322.58] SS 7 [17.4] 5 [0.35]
10 Vent 78.85 AL 4 [10.0] 5 [0.35]
[250] [508.71] SS 6 [14.9] 2 [0.14]
12 Vent 113.00 AL 4 [10.0] 5 [0.35] [300] [729.03] SS 10 [24.9] 2 [0.14]
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. All standard Type 9200 valves aremanufactured with ANSI Class 150 RF(smooth, raised face, unless otherwisespecified). Special facings, drilling andsurface finishes are available upon request.
4. Weight loaded vacuum openings areavailable from -1 oz [-4.3 mbarg] full open.Dual chambers may be required.
5. Valve will open on positive pressure unlessequipped with positive pressure blockaccessory. Minimum vacuum set with thisaccessory is limited to -5'' wc [-12.4 mbarg].Positive pressure is limited. Please consultyour sales representative.
6. Remote pressure sense connection isrequired for all vacuum configurations.
Model Selection
Type 9200, Vacuum Only - Pilot Operated5, 6 (single chamber)
Main Valve Size Valve Trim Minimum1,4 Maximum1
Inlet Orifice Area Material2,3 Set Vacuum Set Vacuum in [mm] in2 [cm2] in wc [mbarg] psig [barg]
2 Vent 3.35 AL -2 [-5.0] -5 [-0.35] [50] [21.61] SS -2 [-5.0] -5 [-0.35]
3 Vent 7.39 AL -2 [-5.0] -5 [-0.35]
[80] [47.68] SS -2 [-5.0] -5 [-0.35]
4 Vent 12.73 AL -2 [-5.0] -5 [-0.35] [100] [82.13] SS -2 [-5.0] -5 [-0.35]
6 Vent 28.89 AL -2 [-5.0] -5 [-0.35]
[150] [186.39] SS -2 [-5.0] -5 [-0.35]
8 Vent 50.00 AL -4 [-10.0] -5 [-0.35] [200] [322.58] SS -4 [-10.0] -5 [-0.35]
10 Vent 78.85 AL -2 [-5.0] -5 [-0.35]
[250] [508.71] SS -2 [-5.0] -2 [-0.14]
12 Vent 113.00 AL -3 [-7.6] -5 [-0.35] [300] [729.03] SS -5 [-12.7] -2 [-0.14]
Notes
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Standard Aluminum valves are manufacturedwith flat faced outlet flange finish inaccordance with commercial practice. Theflanges are designated as Class 150 FF, withdrilling equal to ANSI Class 150. StandardCS and SS valves are manufactured withANSI Class 150 RF (smooth, raised face,unless otherwise specified). Special facings,drilling and surface finishes are availableupon request. All inlet flanges must be raised face.
4. Valve body available in AL, CS or SS.
5. Weight loaded vacuum openings areavailable from -1 oz [-4.3 mbarg] full open.Dual chambers may be required.
6. Valve will open on positive pressure unlessequipped with positive pressure blockaccessory. Minimum vacuum set with thisaccessory is limited to -5'' wc [-12.4 mbarg].Positive pressure is limited. Please consultyour sales representative.
7. Remote pressure sense connection isrequired for all vacuum configurations.
Type 9300, Vacuum Only - Pilot Operated6, 7 (single chamber)
Main Valve Size Valve Trim Minimum1,5 Maximum1
Inlet x Outlet Orifice Area Material2,3,4 Set Vacuum Set Vacuum in [mm] in2 [cm2] in wc [mbarg] psig [barg]
2 x 3 3.35 AL -2 [-5.0] -5 [-0.35] [50 x 80] [21.61] SS -2 [-5.0] -5 [-0.35]
3 x 4 7.39 AL -2 [-5.0] -5 [-0.35]
[80 x 100] [47.68] SS -2 [-5.0] -5 [-0.35]
4 x 6 12.73 AL -2 [-5.0] -5 [-0.35] [100 x 150] [82.13] SS -2 [-5.0] -5 [-0.35]
6 x 8 28.89 AL -2 [-5.0] -5 [-0.35]
[150 x 200] [186.39] SS -2 [-5.0] -5 [-0.35]
8 x 10 50.00 AL -4 [-10.0] -5 [-0.35] [200 x 250] [322.58] SS -4 [-10.0] -5 [-0.35]
10 x 12 78.85 AL -2 [-5.0] -5 [-0.35]
[250 x 300] [508.71] SS -2 [-5.0] -5 [-0.35]
12 x 16 113.00 AL -3 [-7.6] -5 [-0.35] [300 x 400] [729.03] SS -5 [-12.7] -5 [-0.35]
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Consultwith sales representative for verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Aluminum and SS valves are manufacturedwith raised faced inlet flange finish inaccordance with commercial practice. Theflanges are designated as Class 150 RF.
4. With dual diaphragm chambers, valvereaches rated capacity at -1 oz [-4.3 mbarg].Note that 2-inch valve only requires singlediaphragm chamber. Pilot operated control ofvacuum setting is available. Please consultyour sales representative.
5. Remote pressure sense connection isrequired for all vacuum configurations.
Model Selection
Type 9200, Pressure Pilot Weight Loaded Vacuum Combination4, 5
(dual chamber)
Main Valve Size Valve Pressure1
Inlet Orifice Area Trim Material2,3 Pilot Range in [mm] in2 [cm2]
2 3.35 AL
6'' wc to 5 psig [50] [21.61] [14.9 mbarg to 0.35 barg]
2 3.36 6'' wc to 5 psig
[50] [21.68] SS
[14.9 mbarg to 0.35 barg]
3 7.39 AL
4'' wc to 5 psig [80] [47.68] [10 mbarg to 0.35 barg]
3 7.39 4'' wc to 5 psig
[80] [47.68] SS
[10 mbarg to 0.35 barg]
4 12.73 AL
3'' wc to 5 psig [100] [82.13] [7.5 mbarg to 0.35 barg]
4 12.73 5'' wc to 5 psig
[100] [82.13] SS
[12.4 mbarg to 0.35 barg]
6 28.89 AL
3'' wc to 5 psig [150] [186.39] [7.5 mbarg to 0.35 barg]
6 28.89 5'' wc to 5 psig
[150] [186.39] SS
[12.4 mbarg to 0.35 barg]
8 50.00 AL
4'' wc to 5 psig [200] [322.58] [10 mbarg to 0.35 barg]
8 50.00 7'' wc to 5 psig
[200] [322.58] SS
[17.4 mbarg to 0.35 barg]
10 78.85 AL
4'' wc to 5 psig [250] [508.71] [10 mbarg to 0.35 barg]
10 78.85 6'' wc to 2 psig
[250] [508.71] SS
[14.9 mbarg to 0.14 barg]
12 113.00 AL
4'' wc to 5 psig [300] [729.03] [10 mbarg to 0.35 barg]
12 113.00 10'' wc to 2 psig
[300] [729.03] SS
[24.9 mbarg to 0.14 barg]
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Type 9300, Pressure Pilot Weight Loaded Vacuum Combination7, 8
(dual chamber)
Main Valve Size Valve Internals Pressure1
Inlet Orifice Area Material2,3,6 Pilot Range in [mm] in2 [cm2]
2 x 3 3.35 AL
6'' wc to 5 psig [50 x 80] [21.61] [14.9 mbarg to 0.35 barg]
3.36
6'' wc to 5 psig
2 x 3 [21.68] [14.9 mbarg to 0.35 barg]
[50 x 80] 3.36 SS
20'' wc to 50 psig
[21.68] [48.8 mbarg to 3.45 barg]
3 x 4 7.39 AL
4'' wc to 5 psig [80 x 100] [47.68] [10 mbarg to 0.35 barg]
7.39
4'' wc to 5 psig
3 x 4 [47.68] [10 mbarg to 0.35 barg]
[80 x 100] 7.39 SS
12'' wc to 50 psig
[47.68] [29.9 mbarg to 3.45 barg]
4 x 6 12.73 AL
3'' wc to 5 psig [100 x 150] [82.13] [7.5 mbarg to 0.35 barg]
12.73
5'' wc to 5 psig
4 x 6 [82.13] [12.4 mbarg to 0.35 barg]
[100 x 150] 12.73 SS
9'' wc to 44 psig4
[82.13] [22.4 mbarg to 3.03 barg]
6 x 8 28.89 AL
3'' wc to 5 psig [150 x 200] [186.39] [7.5 mbarg to 0.35 barg]
28.89
5'' wc to 5 psig
6 x 8 [186.39] [12.4 mbarg to 0.35 barg]
[150 x 200] 28.89 SS
7'' wc to 25 psig4
[186.39] [17.4 mbarg to 1.72 barg]
8 x 10 50.00 AL
4'' wc to 5 psig [200 x 250] [322.58] [10 mbarg to 0.35 barg]
50.00
7'' wc to 5 psig
8 x 10 [322.58] [17.4 mbarg to 0.35 barg]
[200 x 250] 50.00 SS
11'' wc to 23 psig4
[322.58] [27.4 mbarg to 1.59 barg]
10 x 12 78.85 AL
4'' wc to 5 psig [250 x 300] [508.71] [10 mbarg to 0.35 barg]
78.85
6'' wc to 2 psig
10 x 12 [508.71] [14.9 mbarg to 0.14 barg]
[250 x 300] 78.85 SS
12'' wc to 14 psig5
[508.71] [29.9 mbarg to 0.97 barg]
12 x 16 113.00 AL
4'' wc to 5 psig [300 x 400] [729.03] [10 mbarg to 0.35 barg]
113.00
10'' wc to 2 psig
12 x 16 [729.03] [24.9 mbarg to 0.14 barg]
[300 x 400] 113.00 SS
19'' wc to 14 psig5
[729.03] [47.3 mbarg to 0.97 barg]
Notes
1. Listed minimum and maximum set pressuremay not be available for some material andservice temperature combinations. Consultwith your sales representative for verification.
2. Refer to material sections of this catalog forbalance of standard materials for the valvemodel shown.
3. Standard Aluminum valves are manufacturedwith flat faced outlet flange finish inaccordance with commercial practice. Theflanges are designated as Class 150 FF, withdrilling equal to ANSI Class 150. StandardCS and SS valves are manufactured withANSI Class 150 RF (smooth, raised face,unless otherwise specified). Special facings,drilling and surface finishes are availableupon request.
4. 50 psig [3.45 barg] with SS cap.
5. 30 psig [2.07 barg] with SS cap.
6. Valve body available in AL, CS or SS.
7. With dual diaphragm chambers, valvereaches rated capacity at -1 oz [-4.3 mbarg].Note that 2-inch valve only requires singlediaphragm chamber. Pilot operated control ofvacuum setting is available. Please consultyour sales representative.
8. Remote pressure sense connection isrequired for all vacuum configurations.
Model Selection
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
1. All model numbers shown are standard.Some alternative flange facing or drilling isavailable upon request.
2. The pressure relief valve connection is drilledto meet the size and number of bolts for ANSIClass 150 flanges.
3. Standard Settings: -1/2 oz [-2.2 mbarg] -11/2 oz [-6.6 mbarg]Full open at double this setting.
4. Seat and seals available in BUNA-N, Viton®
and EPR.
Notes
Model Selection
Type 96A Vacuum Breaker1
Tank Connection Safety Valve Connection Valve Size ANSI Flange Valve Body Valve Size ANSI Flange Maximum Valve Model in [mm] Class2 Material in [mm] Class2 Positive Pressure Number3,4
In addition to the beneficial featuresavailable through the use of the Series 90and 9000 pilot operated pressure reliefvalves, a variety of accessories andoptions are available to provide additionalfunctions. Some simplify the process ofperiodic testing, an important safetyrequirement today. Others assist in thesuccessful operation of the pressure reliefvalve under adverse or specialapplications.
Please refer to the options and accessoriesavailability table on page 29. On request,other options may be available for somemodels for special situations, such asposition indicators, purge connections,multiple pilots, differential pressure sensing, etc.
A. Field Test Connection:• In-service verification of set pressure.
• Simplifies the periodic testing of pressure relief valves.
All Series 90 and 9000 pilot operatedpressure relief valves may be readilytested for verification of set pressureduring normal operation with this option,using an external pressure source and atest gauge. When the test pressureequipment is initially connected, the testgauge will indicate current systempressure, if any. When test pressure isslowly admitted through a metering valve,the pilot and the main valve dome arepressurized, simulating an increasedsystem pressure.
When set pressure is reached the pilot willactuate. This actuation pressure may thenbe compared with the nameplate value.Depending upon the current value ofsystem pressure, the main valve may alsobriefly open and close, or partially openand close, providing verification that themain valve will successfully operate.Special provisions are available totemporarily prevent main valve openingduring this test (consult with yourrepresentative for details).
The standard Field Test Connection isshown in Figure A1. With this style, anyoverpressure condition during testing will override the test pressure and openthe valve.
A three-way ball valve shown in Figure A2must be used for the Field Test Connectionwhen any vacuum opening is required ofthe valves, as the check valve above wouldprevent a vacuum signal from reaching thepilot. This style of Field Test Connectionmust also be used with the Type 400 non-flowing modulating pilot.
• A Field Test Connection is recommendedwhen a Backflow Preventer is specifiedin order to provide a means to evacuatetrapped dome pressure before disassembly.
This option, sometimes called a “vacuumblock,” prevents a pilot operated pressurerelief valve from reverse flow whensufficient vacuum is present at the inletflange. The Backflow Preventer alsoprevents reverse flow when the pressure at the outlet flange (superimposed backpressure) is greater than the currentsystem pressure. Reverse flow will occur with any standard type or design of pilot operated pressure relief valve when sufficient reverse differentialpressure exists.
All backflow preventers operate bypermitting the introduction of outletpressure into the dome of the main valve,thereby holding the unbalanced movingelement firmly onto the nozzle, overcomingthe effect of a reverse differential pressureacross the pressure relief valve. The optionalso includes a provision to preventreverse flow through the pilot supply lineback into the system.
A Backflow Preventer should be specifiedwhenever:
• A vacuum may be present at the inletconnection due to unusual operatingconditions or a temporary vacuum condition may occur under startup conditions.
• The discharge of the pressure reliefvalve is connected to a downstreampressure vessel, where pressure mayvary from time to time, in excess of thepressure in the upstream system.
• The discharge of multiple pressure reliefvalves is combined into a single manifoldor vent system, creating superimposedback pressures in excess of the currentupstream system pressure.
• A pilot operated vacuum valve is specified and the valve must remainclosed on positive pressure.
B. Backflow Preventer
Options and Accessories
A1. Field Test Connection
A2. Field Test Connection
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
C. Pilot Supply Filter:• Protects pilot from excessive particulatematter in flow stream.
This is a mechanical filter available forapplications where there is a possibility oflarge amounts of particulate matter in thefluid stream. The Pilot Supply Filter ismounted to the main valve cap. A filterdrain valve is optionally available.
D. Remote Valve Lift Indicator:• Provides remote signal to allow the plantoperator to know when a safety valvehas operated.
This feature consists of a differentialpressure switch, actuated when the mainvalve has been operated. The switch isadjusted to sense the difference betweenthe system pressure and the main valvedome pressure. Electrical indication is then available to a remote location. The switchcontact style and rating, as well as the typeof enclosure and hazard rating, should befurnished. The switch is mounted to themain valve cap.
Please note that this method of indicationis indirect, since it only indicates that pilotactuation has occurred and the necessarydome pressure reduction has taken place.Direct mechanical position indication is notavailable.
E. Auxiliary Setters:• Allows the primary pilot to be set easilyto a second or third set pressure.
This system is widely used aboard shipswhere it is desirable to have different setpressures when under differentjurisdictions or when a ship is in port.
The accessory consists of additionalsprings which are fitted to the primary pilot.
C. Pilot Supply Filter
D. Remote Valve Lift Indicator
E. Auxiliary Setters
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
F. Manual Unloader:• Permits the pressure relief valve to beopened at pressures below the name-plate setting.
• Acts as manual override to normal pressure setting, but has no effect on the sealed pressure setting.
A Manual Unloader consists of a smallhand valve connected to the dome line of the main valve. Opening the hand valvevents the dome pressure faster than it canbe recharged by the pilot supply. Sufficientdome pressure reduction results inopening of the main valve, due tounbalanced forces, simulating a pilotactuation. This option is used to allow thepressure relief valve to be used, along withother valves, for the emergency reductionof system pressure due to potential safetyhazards. Venting from the unloader valve isto the atmosphere through a weatherfitting, unless otherwise specified.
G. Remote Unloader (not pictured):• Permits the pressure relief valve to beremotely opened to depressurize thesystem.
This is the same scheme as the ManualUnloader, except that the unloader valve isremotely operated by either solenoid orpneumatic actuator. Please furnish fullparticulars of the type of unloader valve tobe furnished and the desired valve action,whether normally open or closed. Forpneumatic operation, indicate the fluidmedia and available pressure range; forsolenoid operation, the voltage and currenttype (AC or DC). Furnish the frequency inHertz for alternating current. The type ofenclosure, such as explosion proof, splashproof, corrosion resistant, etc., must alsobe specified for electric operators. Unlessotherwise specified, no separate wiringenclosure is furnished. Venting from theunloader valve will be to the atmospherethrough a weather fitting.
H. Pilot Exhaust Tubed to MainValve Outlet (PEMVO):
• Eliminates any local venting of fluidmedia from pilot.
This option is desirable when the pressurerelief valve is within a closed environmentand even the small amount of gasdischarged from the pilot is to be avoided.
In the majority of applications, where this option is applied, there will be nomeasurable effect on the set pressure of the pressure relief valve. However thefollowing considerations shall be taken into account:
• The effect of superimposed back pressure on the Series 90 pilot valve will be to slightly reduce the nameplate set pressure. This represents a safe con-dition, i.e., the pilot is slightly overbal-anced to the effect of back pressure.Readjustment of pilot set pressure israrely necessary (see below).
• For the larger diaphragm case Type 91,93, or 94 pilot the set pressure will bereduced by 0.0034 psig for each 1 psig[0.034 mbarg for each 1.0 mbarg] ofback pressure.
• For the small diaphragm case Type 91,93, 94 or 95 pilot the set pressure will bereduced by 0.233 psig for each 1 psig[0.233 mbarg for each 1.0 mbarg] ofback pressure.
• When this accessory is used, and there is a constant superimposed backpressure of relative significance, noupward adjustment to the factory pilotpressure setting is usually made, unlessrequested by the customer.
Please consult with your representativefor additional assistance.
F. Manual Unloader
H. Pilot Discharge Tubed to MainValve Outlet
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
• Pressure relief valve will respond toactual system pressure conditions.
• Eliminates undesirable cycling due toexcessive inlet pressure losses.
• Improves safety under adverse operating conditions.
This optional feature permits the pilot to sense system pressure at a location that most accurately reflects the actualoperating pressure of the protectedsystem. A remote pressure senseconnection eliminates the false reading of system pressure that will occur duringrelieving conditions due to pressure lossesin the inlet piping to the pressure reliefvalve. Remote pressure sense connectionis required for any vacuum setting.
Most applicable codes recommend that theinlet piping system be designed for amaximum anticipated pressure loss of 3 percent of set pressure. If this is notpossible, the remote pressure senseconnection should be specified. Inletpressure loss can occur during relievingconditions, when one or more of thefollowing conditions are present:
• The length of the inlet piping is substan-tial, thereby contributing an excessivepressure loss under flowing conditions.
• There are one or more directionalchanges in the inlet piping, such aselbows, tees, etc., contributing to anexcessive pressure loss.
• The geometry of the connectionbetween the pressure vessel and the inlet piping creates an excessivepressure loss.
• Block or isolation valves between thesystem and the pressure relief valve are overly restrictive to flow.
Please note that the addition of a remotepilot sense line allows the pilot to correctlysense system pressure and to keep thevalve from rapid cycling. However, therelieving capacity will be proportionatelyreduced whenever there is inlet pressureloss to the pressure relief valve. The orificearea sizing calculation should take inletloss into consideration in arriving at therequired area.
The amount of anticipated inlet loss, underactual relieving conditions, should bereviewed with your representative, sincevalve performance during a relief cyclemay be affected by high inlet pressureloss.
The installation of a remote pilot sense linemay also reduce the ingestion ofparticulate matter from ‘dirty’ systems,whether or not excessive inlet pressureloss is present during the relief cycle.
Pilot operated pressure relief valvesfurnished originally for remote pilot sensemay be converted to integral sense, sincethe pressure pickup (dipper tube) isinstalled in all instances at the factory, andthen closed off with a removable threadedpipe plug.
Options and Accessories
Options Matrix
FTC BFP Pilot Aux. Manual or PEMVO Remote Pilot Lift Filter Setters Remote Sense Gag Lever Blowdown
91 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
93 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
94 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
95 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
96A
9200 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
9300 ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔
I. Remote Pressure SenseConnection
Suggested Application Matrix
Series Series 90 9000
General Pressure ✔ ✔
Vacuum Only 96A ✔
Pressure and Vacuum 1 ✔
Cryogenic 91, 94 ✔
Marine Service 91, 94, 95 9300
Severe Chloride Service 9300
Marine Vapor 93 9300
Recovery Systems
Note
1. Type 96A in combination with other models.
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Tank Relief Valve Connection Dimensions, in [mm] Weight, Max.Connection –––––––––––––––––––––––––––– A –––––––––––––––––––––––––––– B C lb [kg] Size 3 4 6 8 10 12 Max. Max. AL SS in [mm] [80] [100] [150] [200] [250] [300]
ASME VIII Gas Flow (Set Pressure ≥ 15 psig [1.03 barg])
Valve Sizing1 – Sonic Flow Equations
Sizing InformationASME Section VIIIAfter system capacity has beendetermined, a properly sized pressurerelief valve is determined by the followingmethod.
A. From the formulas in this section,calculate required orifice area as afunction of capacity.
B. Identify the required orifice size. Alwayschoose an orifice which is equal to, orgreater than the required orifice area.
C. Specifications exceeding AndersonGreenwood standard catalogdescriptions should be referred to oursales department.
Note
1. A computer sizing program is available.Consult your sales representative.
where
Sonic Coefficient of Discharge - K
Valve Type ASME Derated Coefficient
91 and 94 0.77095 0.84593 0.8529300 0.629
A Orifice area or equivalent flow area.
C The gas constant, based on the specific heat ratio, k.If C is unknown, use C = 315, a conservative value.Refer also to Table 1, page 38.
F Subsonic flow factor, based on the ratio of specificheats and pressure drop(differential) across the valve.
k Ratio of specific heats of gas, where k = Cp/Cv. Whenthe value of k is unknown, use k = 1.001, aconservative value. Refer also to Table 1, page 38.
K ASME derated valve coefficient, used where setpressure is 15 psig [1.03 barg] and greater, and therequirements of Section VIII, Division 1 of the ASMEBoiler and Pressure Vessel Code apply.
Kd Subsonic valve coefficient to be used where setpressure is less than 15 psig.
M Molecular weight of the flowing gas. Refer to PhysicalProperties of Selected Gases, or other resources, forlisting of M.
square inch square centimeter (in2) [cm2]
— —
— —
— —
— —
— —
— —
Gas Flow
Symbol Description Inch Metric Pounds Units
Valve Sizing – Nomenclature
U.S. Weight Flow (lb/h)Formula 3
A(in2) =W TZ
––––––– –––CK P1 M
–
Metric Weight Flow [kg/h]Formula 3M
A[cm2] =1.316 W TZ–––––––– –––CK P1 M
–
TZ– –––C
U.S.Volumetric Flow (SCFM)Formula 4
A(in2) =V MTZ
–––––––––––––6.32 CK P1
TZ– –––C
Metric Volumetric Flow [Nm3/h]Formula 4M
A[cm2] =V MTZ
–––––––––––––17.02 CK P1
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
English Units = Kd = 0.756 (P1-14.7)Metric Units = Kd = 0.756 [(P1-1.013) x 14.5]
.0517
.0517
.65
.75
.85
Figure 14 - Type 9200 Subsonic Valve Coefficient (Kd) vs. Relief Pressure
Absolute Pressure Ratio
K = 0.650P
P
-.3492
.50 .55 .60 .65 .70 .75 .80 .85 .90 .95 1.00.60
.70
.80
.90
Val
ve C
oef
fici
ent
(K ) d
d1
( )
PP
2
1( )
.85
.75
.65
Figure 15 - Type 9300 Subsonic Valve Coefficient (Kd) vs. Absolute Pressure Ratio
.85
.83
.81
.79
.77
.75
.73
.71
.69
.67
.65.50 .55 .60 .65 .70 .75 .80 .85 .90 .95 1.00
Val
ve C
oef
fici
ent
(Kd)
Absolute Pressure Ratio
Kd = .678P
P2
1)(
P
P2
1)(
-.285
Figure 16 - Types 91, 94 and 95 Subsonic Valve Coefficient (Kd) vs. Absolute Pressure Ratio
For larger capacities, please consultyour sales representative. AndersonGreenwood has two Models of the 9300with increased discharge coefficientsfor large storage tanks.
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
Table 1 - Values of M, k for Representative Gases and Vapors
Gas or Vapor M k C Molecular Spec. Heat Gas Boiling Point1
Weight Ratio Constant (Atm Pressure)
Air 29 1.40 356 -318°F [-194°C]
Ammonia (NH3) 17 1.31 348 -28°F [-33°C]
Benzene (C6H6) 78 1.12 329 176°F [80°C]
Butadiene (C4H6) 54 1.12 329 24°F [-4°C]
Carbon Dioxide (CO2) 44 1.28 345 -109°F [-78°C]
Ethane (C2H6) 30 1.19 336 -127°F [-88°C]
Ethylene (C2H4) 28 1.24 341 -155°F [-104°C]
Helium (He) 4 1.66 377 -454°F [-270°C]
Hexane (C6H14) 86 1.06 322 156°F [69°C]
Hydrogen (H2) 2 1.41 357 -423°F [-253°C]
Hydrogen Sulphide (H2S) 34 1.32 349 -77°F [-61°C]
Methane (CH4) 16 1.31 348 -259°F [-162°C]
Methyl Mercaptan (CH4S) 48.1 1.20 337 43°F [6°C]
n-Butane (C4H10) 58 1.09 326 31°F [-1°C]
Natural Gas (SG = 0.60) 17.4 1.27 344 -260°F [-162°C]
Nitrogen (N2) 28 1.40 356 -320°F [-196°C]
Oxygen (O2) 32 1.40 356 -297°F [-183°C]
Pentane (C5H12) 72 1.07 323 97°F [36°C]
Propane (C3H8) 44 1.13 330 -44°F [-42°C]
Propylene (C3H6) 42 1.15 332 -54°F [-48°C]
Propylene Oxide (C3H5O) 58.1 1.21 338 94°F [34°C]
Note
1. Contact your sales representative for 90 or9000 Series product recommendations whenthe boiling point of the lading fluid is inbetween the minimum and maximum expectedambient temperatures.
Sizing
.85
.83
.81
.79
.77
.75
.73
.71
.69
.67
.65.50 .55 .60 .65 .70 .75 .80 .85 .90 .95 1.00
Val
ve C
oef
fici
ent
(Kd)
Absolute Pressure Ratio
Kd = .700 -.265
P
P2
1)(
P
P2
1)(
Figure 17 - Type 93 Subsonic Valve Coefficient (Kd) vs. Absolute Pressure Ratio
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
When ordering or inquiring about the AndersonGreenwood Series 90 and 9000, please includethe following:
• Model Number • Set Pressure • Accessories • Required Capacity • Maximum Inlet Temperature • Service (specific gravity or molecular weight) • Detail of any special requirements, including inspection and testing • Connections
Anderson Greenwood Low Pressure POPRV CatalogSeries 90 and 9000 Pilot Operated Pressure Relief Valves
A – Field Test ConnectionB – Manual BlowdownC – Remote Pressure Sense (for pressure only units) (vacuum and combination units are remote sense by default)D – Auxiliary Filter (Series 90 Pilots only)E – Remote BlowdownF – Pilot Exhaust to Main Valve Outlet (Type 9300 only)G – Back Flow Preventer
Series 9000 Ordering Information
9 2 9 0 C 0 3 S S B A
Note1. Configurations "V" and "C" require Accessory
Code "C" (Remote Pressure Sense)
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Tyco Flow Control (TFC) provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This data sheet is intended only as a guide to TFC products and services.Individuals using this data sheet must exercise their independent judgment in evaluating product selection and determining product appropriateness for their particular purpose and system requirements. TFC MAKES NOREPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TOTHE INFORMATION SET FORTH HEREIN OR THE PRODUCT(S) TO WHICH THE INFORMATION REFERS. ACCORDINGLY, TFC WILL NOT BE RESPONSIBLE FOR DAMAGES (OF ANY KIND OR NATURE, INCLUDINGINCIDENTAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S. and foreign countries. Tycoreserves the right to change product designs and specifications without notice. All registered trademarks are the property of their respective owners. Printed in the USA.