e 1 Type ACE97 Pad-Depad Valve - Emerson Electric

Bulletin 74.3:ACE97June 2013

D10

2721

X01

2

www.fisherregulators.com

Type ACE97 Pad-Depad Valve

• Bubble Tight Shutoff

• Pilot Controlled

• Stainless Steel

• Self-Contained

• Diagnostics

• Fully Balanced

• Frictionless Pilot Valve

• Maximum Vapor Space Control

W8161

Figure 1. Type ACE97 Pad-Depad Valve

Bulletin 74.3:ACE97

2

Pad Specifications

Pad Body SizesNPS 1/2, 1, and 2 / DN 15, 25, and 50

Maximum Operating Inlet Pressure(1)

200 psig / 13.8 bar

Maximum Main Valve Inlet Pressure(1)

200 psig 13.8 bar

Control Pressure Ranges(1)

See Table 1

Maximum and Minimum Differential Pressures(1)

Minimum: 25 psig / 1.7 bar Maximum: 200 psig / 13.8 bar

Maximum Backpressure(1)

20 psig / 1.4 bar

Flow Coefficients for Relief Valve Sizing (110% of rated Cv)

Cv = 0.2 use Cv = 0.22 Cv = 7.5 use Cv = 8.25Cv = 0.4 use Cv = 0.44 Cv = 10 use Cv = 11Cv = 1 use Cv = 1.1 Cv = 20 use Cv = 22Cv = 2 use Cv = 2.2 Cv = 45 use Cv = 50Cv = 4 use Cv = 4.4 Cv = 60 use Cv = 66

Depad Specifications

Depad Body SizesNPS 1, 2, 3, and 4 / DN 25, 50, 80, and 100

Depad Pressure Ranges(1)

See Table 1

Valve CoefficientsNPS 1 / DN 25 body: Cv = 3, Cv = 12, or Cv = 17NPS 2 / DN 50 body: Cv = 20, Cv = 35, or Cv = 70NPS 3 / DN 80 body: Cv = 6, Cv = 90, Cv = 115, or Cv = 140NPS 4 / DN 100 body: Cv = 150, Cv = 200, or Cv = 280

Specifications

General Type ACE97 Specifications

Pressure RegistrationExternal

Temperature CapabilitiesNitrile (NBR): -20 to 180°F / -29 to 82°CFluorocarbon (FKM): 0 to 212°F / -18 to 100°CEthylenepropylene (EPDM - FDA):-20 to 212°F / -29 to 100°CPerfluoroelastomer (FFKM):-20 to 212°F / -29 to 100°C

Construction MaterialsPad Body and Bonnet

NPS 1/2 and 1 / DN 15 and 25; Cv = 0.2 and Cv = 0.4: 316L Stainless steelNPS 1 and 2 / DN 25 and 50; Cv = 1 to 4 and Cv = 5 to 10: 316 Stainless steel NPS 2 / DN 50; Cv = 20 to 60: CF3M/CF8M Stainless steel

Depad Body and Bonnet: 316 Stainless steelCage: 316 Stainless steelActuator: 316 Stainless steelTrim: stainless steelElastomers: Nitrile (NBR), Fluorocarbon (FKM), Perfluoroelastomer (FFKM), or Ethylenepropylene (EPDM - FDA)Diaphragm: Nitrile (NBR), Fluorocarbon (FKM), or Ethylenepropylene (EPDM - FDA)

Approximate WeightsNPS 1/2 x 1 x 1 / DN 15 x 25 x 25:70 pounds / 32 kgNPS 1 x 2 x 2 / DN 25 x 50 x 50:105 pounds / 48 kgNPS 2 x 3 x 3 / DN 50 x 80 x 80: 175 pounds / 79 kg

1. The pressure/temperature limits in this Bulletin or any applicable standard limitation should not be exceeded.

IntroductionThe Type ACE97 Pad-Depad valve is a self-contained, pilot-operated valve that maintains a blanket of inert gas on top of a stored product to protect it from atmospheric contamination. It reduces combustibility, decreases vaporization, controls vapor space pressure during pump-in and pump-out operations, and helps prevent the tank from entering a vacuum condition and collapsing upon itself. The Type ACE97 valve provides excellent and accurate pressure control of the vapor space in the tank. Blanketing pressure is kept to a minimum in order to conserve the use of blanketing gas.

Pad (Tank Blanketing) – ensures a minimum pressure is maintained in the tank vapor space during normal operation.

Depad (Vapor Recovery) – limits tank pressure to a maximum value during normal operation.

Tank and vapor recovery connections are available to meet most customer requirements. A Single Array Manifold (SAM) provides a single tank and sensing connection and is required for tanks having a single nozzle. Accessories include gauges, purge meters, pressure switches, and check valves.

Features and BenefitsPilot Controlled: Type ACE97 valves (NPS 1 / DN 25 and larger) are pilot-operated for a higher degree of accuracy and control.

Fully Balanced: A fully balanced valve eliminates setpoint changes caused by variations in inlet pressure.

Options and AccessoriesInlet Pressure Gauge: Displays pressure of blanketing gas supply to the blanketing valve.Control Pressure Gauge: Low-pressure gauge measures tank pressure.Pressure Switch: Allows for the installation of an alarm system to indicate either low or high-pressure on the tank.Flow Indicator: Provides a visual indication of blanketing gas flow.Outlet Check Valve: Prevents corrosive gases and vapors from flowing back into the blanketing system.Diagnostic Gauge: Allows analysis of valve operation in the field, simplifying service and reliability. (Only available on NPS 1 and 2 / DN 25 and 50 pad valve.)

Bulletin 74.3:ACE97

3

Figure 2. Type ACE97 Pad-Depad Valve Parts

TO AND FROM TANK

E0673

INlET FIlTER

PAD VAlVEGAS INlET

ACTuATORVEnT

DEPAD MAIN VAlVE

DEPAD PIlOT VAlVE

Single Array Manifold (SAM): Provides sense line connection and main valve connection through a single tank nozzle.Purge Meters: Prevents corrosive tank vapors from damaging upstream equipment.

Principle of Operation Pad (Figure 3)

NPS 1 and 2 / DN 25 and 50 Pad Valves (Figure 3)When tank pressure decreases below the pad setpoint (due to pump out operations or thermal cooling), the actuator diaphragm moves downward pushing open the pad pilot. This creates flow from the pad loading chamber to downstream. When pad loading pressure decreases, the force created by inlet pressure on the pad main valve plug overcomes the main spring force and opens the main valve plug allowing flow through the pad valve to the tank. Once tank pressure reaches pad setpoint, the pad pilot closes, pad loading pressure equalizes with inlet pressure and the pad valve closes.

NPS 1/2 / DN 15 Pad Valves (Not Shown)The NPS 1/2 / DN 15 Pad valve has a main valve only. When tank pressure decreases below the pad setpoint the actuator diaphragm

moves downward pushing the valve plug open and allowing flow through the pad valve to the tank.

Depad (Figure 4)When tank pressure increases above the depad setpoint (due to pump-in operations or thermal heating), the actuator diaphragm moves upward and pushes open the depad pilot. This releases depad loading pressure (nitrogen or other supply gas). When depad pilot loading pressure decreases, the depad main valve opens by a spring and allows flow from the tank to the vent or recovery system.

DiagnosticsTank blanketing valves are often installed in locations that are difficult to access. Type ACE97 valves are available with a diagnostics feature that allows analysis of valve operation in the field, making maintenance easier and more reliable.

The diagnostics feature relies uses relationship of pressure in the pilot and main valve chambers to analyze valve performance.

Bulletin 74.3:ACE97

4

ATMOSPHERIC PRESSURE

VENT HEADER PRESSURE

INLET PRESSURE

TANK PRESSURE

PILOT LOADING PRESSURE

Vent

Figure 4. Type ACE97 Pad Off / Depad On

ClOSED PIlOT

INERT GAS IN PAD VAlVE TANK CONNECTION

SENSING CONNECTION

ACTuATOR

DEPAD MAIN VAlVE

DEPAD PIlOT

POPPET

O-RINGSEAT

ROllINGDIAPhRAGM

CAGE

INlET

REGulATOR

DIAGNOSTICPORT

ON/OFFDIAGNOSTICGAuGE

MAIN VAlVE SPRING

CONTROllED PRESSuRE RANGE SPRING

lOADING PRESSuRE ExhAuSTED BACK TO TANK

E0004

ATMOSPHERIC PRESSURE

VENT HEADER PRESSURE

INLET BLEED PRESSURE

INLET PRESSURE

TANK PRESSURE

PILOT LOADING PRESSURE

Figure 3. Type ACE97 Pad On / Depad Off

OPEN PIlOT

INERT GAS IN PAD VAlVE

SENSING CONNECTION

ACTuATOR VEnT

ADjuSTABlEDEADBAND

DEPAD PIlOT

DEPAD MAIN VAlVEPOPPET

O-RING SEAT

ROllINGDIAPhRAGM

CAGE

INlET

REGulATOR

DIAGNOSTICPORT

INlET BlEED

lOADING PRESSuRE ExhAuSTED BACK TO TANK ON/OFF

DIAGNOSTICGAuGE

MAIN VAlVE SPRING

CONTROllED PRESSuRE RANGE SPRING

E0005

TANK CONNECTION

Bulletin 74.3:ACE97

5

System SizingTank Blanketing systems must be properly sized to have capacity to supply enough blanketing gas to maintain the setpoint pressure, yet large enough to vent excess gas without having tank vapor space pressure rise above allowable limits. Pad valves must not be so large that they cause overpressure. Sizing must also take into account applicable codes and standards as they apply to the installation.

For proper sizing of the pad and depad valves, certain information is required. Proper sizing is essential to protect the product, the tank, the environment, and personnel.

Sizing InformationThe following list contains all necessary information to properly size a valve once system parameters are determined. The customer must provide the following:

• Pump-in rate (for depad calculation)• Pump-out rate (for pad calculation)• Inert (blanketing) gas specific gravity• Inert gas supply pressure (for pad selection)• Tank volume (for API sizing both pad and depad)• Stored fluid flash point (for API sizing depad)• Stored fluid boiling point (for API sizing depad)• Vent gas specific gravity (SG) (for API sizing depad)• Depad setpoint• Vent piping backpressure• Sizing method (Direct Displacement or API 2000)

Direct Displacement

The direct displacement method should be used with extreme caution. The direct displacement method determines the amount of blanketing gas required to replace liquid pumped out of the tank and the amount of gas that must be removed due to liquid pump in. Direct displacement does not account for fluctuating temperature or other factors that may affect pressure in the vapor space. This method is typically applied to tanks containing non-flammable, non-volatile products.

Pad Sizing Qpad = Qpump-outwhere, Qpad = Required Pad Flow Rate Qpump-out = Required Flow Rate for displacement due to

pump-out (See Table 2)

Depad Sizing Qdepad = Qpump-inwhere, Qdepad = Required Depad Flow Rate Qpump-out = Required Flow Rate for displacement due to

liquid pump-in. (See Table 2)

API 2000

The American Petroleum Institute Standard 2000 (API 2000) sizing criteria accounts for liquid pump-in and pump-out as well as contraction and expansion of tank vapors due to heating and cooling. When using API 2000 methods:

Pad Sizing Qpad = Qpump-out + Qthermalwhere, Qpad = Required Pad Flow Rate Qpump-out = Required Flow Rate for displacement due to

pump-out (See Table 5) Qthermal = Required Flow Rate due to thermal cooling

(See Table 6)

Depad Sizing Qdepad = Qpump-in + Qthermalwhere, Qpad = Required Depad Flow Rate Qpump-in = Required Pump-In Rate (See Table 5) Qthermal = Required Flow Rate due to thermal expansion

(See Table 6)

Supplemental VentingDepending on the method, there can be a significant difference in the calculated required capacity. No matter which method is used, the tank must be equipped with supplemental venting to protect the tank, product, and personnel in cases of equipment failure, fire exposure, or other conditions that could cause the tank pressure or vacuum to exceed operating limits.

Capacity Information

Pad ValvesIn the case of pad valves, the tables are based on 0.97 specific gravity nitrogen. If it is desired to convert nitrogen flow rates of another gas, multiply the flow rate value from the capacity table by the following correction factor in Table 3.

Depad ValvesIn the case of depad valves, the tables are based on air (1.0 specific gravity). Always use the differential pressure between tank pressure (depad setpoint) and vent header (vapor recovery) pressure to calculate flow through the depad valve.

CONTROllED PRESSuRE RANGESSPRING FREE lENGTh SPRING WIRE DIAMETER

Pad Setpoint Depad Setpoint (Above Pad)Inch w.c. mbar Inch w.c. mbar Inch mm Inch mm0.5 to 3 1 to 7 4 to 10 10 to 25 3.08 78.2 0.105 2.67

0.5 to 7 1 to 17 4 to 6 10 to 15 4.00 102 0.092 2.34

3 to 13 7 to 32 4 to 16 10 to 40 3.73 94.7 0.156 3.96

4 to 10 10 to 25(1) 16 to 78 40 to 194(1) 3.73 94.7 0.156 3.96

4 to 10 10 to 25(1) 16 to 78 40 to 194(1) 2.90 73.7 0.250 6.35

0.5 to 1.4 psig 0.03 to 0.10 bar 0.25 to 1 psig 0.02 to 0.07 bar3.80 96.5

0.250 6.35

1.0 to 2.2 psig 0.07 to 0.15 bar 0.25 to 2.0 psig 0.02 to 0.14 bar 0.313 7.95

1. Two nested springs are used.

Table 1. Control Pressure Ranges

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Table 2. Flow Rate ConversionMulTIPly MAxIMuM PuMP RATE By TO OBTAIN:

U.S. GPMU.S. GPHm3/hr

8.0210.13371.01

SCFHSCFHNm3/h

Barrels/hrBarrels/day

5.6150.2340

SCFHSCFH

Table 3. Correction Factors (For Converting Nitrogen Flow Rates to Other Gas Flow Rates)

BlANKET GAS SPECIFIC GRAVITy CORRECTION FACTORNatural Gas 0.60 1.27

Air 1.00 0.99Dry CO2 1.52 0.80

Correction Factor = 0.985SG

Table 4. Correction Factors (For Converting Air Flow Rates to Other Gas Flow Rates)

VENT GAS SPECIFIC GRAVITy CORRECTION FACTOR0.600.801.201.40

1.291.190.910.85

1.601.802.003.00

0.790.750.710.58

Correction Factor = 1.00SG

Table 5. Flow Rate Requirements for Liquid Pump-In Pump-Out per API 2000PuMP-OuT (INBREAThING) PuMP-IN (OuTBREAThING)

Flashpoint > 100°F / 38°C or Normal Boiling Point > 300°F / 149°C

5.6 SCFH / 0.15 Nm3/h of air per barrel/hour of liquid8.0 SCFH / 0.21 Nm3/h of air per GPM of liquid35.1 SCFH / 0.94 Nm3/h of air per m3/hr of liquid

6 barrels/hour of SCFH air per barrel/hour of liquid8.6 SCFH / 0.23 Nm3/h of air per GPM of liquid37.7 SCFH / 1.01 Nm3/h of air per m3/hr of liquid

Flashpoint < 100°F / 38°C or Normal Boiling Point < 300°F / 149°C

5.6 SCFH / 0.15 Nm3/h of air per barrel/hour of liquid8.0 SCFH / 0.21 Nm3/h of air per GPM of liquid35.1 SCFH / 0.94 Nm3/h of air per m3/hr of liquid

12 SCFH / 0.32 Nm3/h of air per barrel/hour of liquid17 SCFH / 0.46 Nm3/h of air per GPM of liquid75.3 SCFH / 2.02 Nm3/h of air per m3/hr of liquid

Table 6. Gas Flow Required for Thermal Cooling (Inbreathing) or Heating (Outbreathing) per API 2000 (Interpolate for Intermediate Sizes)VESSEl CAPACITy AIR FlOW RATE REQuIRED

Barrels Gallons litersInbreathing

OutbreathingFlashpoint < 100°F / 38°C or

Normal Boiling Point < 300°F / 149°C

Flashpoint > 100°F / 38°C or Normal Boiling Point

> 300°F / 149°CSCFh Nm³/h SCFh Nm³/h SCFh Nm³/h

6010050010002000

25204200

21,00042,00084,000

950016,00079,500159,000318,000

6010050010002000

1.612.6813.426.853.6

40603006001200

1.071.618.0416.132.2

6010050010002000

1.612.6813.426.853.6

300040005000

10,00015,000

126,000168,000210,000420,000630,000

477,000636,000795,000

1,590,0002,385,000

300040005000

10,00015,000

80.4107134268402

18002400300060009000

48.264.380.4161241

300040005000

10,00015,000

80.4107134268402

20,00025,00030,00035,00040,000

840,0001,050,0001,260,0001,470,0001,680,000

3,180,0003,975,0004,769,0005,564,0006,359,000

20,00024,00028,00031,00034,000

536643750831911

12,00015,00017,00019,00021,000

322402456509563

20,00024,00028,00031,00034,000

536643750831911

45,00050,00060,00070,00080,000

1,890,0002,100,0002,520,0002,940,0003,360,000

7,154,0007,949,0009,539,00011,129,00012,719,000

37,00040,00044,00048,00052,000

9921072117912861394

23,00024,00027,00029,00031,000

616643724777831

37,00040,00044,00048,00052,000

9921072117912861394

90,000100,000120,000140,000160,000

3,780,0004,200,0005,040,0005,880,0006,720,000

14,309,00015,899,00019,079,00022,258,00025,438,000

56,00060,00068,00075,00082,000

15011608182220102198

34,00036,00041,00045,00050,000

911965109912061340

56,00060,00068,00075,00082,000

15011608182220102198

180,000 7,560,000 28,618,000 90,000 2412 54,000 1447 90,000 2412

Bulletin 74.3:ACE97

7

Table 7. NPS 1/2 / DN 15 Pad Valve Capacities of 0.97 Specific Gravity Nitrogen

INlET PRESSuRECAPACITIES IN SCFh / Nm3/h OF NITROGEN

Cv = 0.2 Cv = 0.4psig bar kg/cm2 kPa SCFh Nm3/h SCFh Nm3/h253040

1.72.12.8

1.82.12.8

172207276

250290370

6.77.89.9

550630780

14.716.920.9

506070

3.44.14.8

3.54.24.9

345414483

450530610

12.114.216.3

93010701230

24.928.733.0

8090100

5.56.26.9

5.66.37.0

552621690

690780860

18.520.923.0

139015601720

37.341.846.1

120140160

8.39.711.0

8.49.811.2

8289661103

102011801340

27.331.635.9

204023602680

54.763.271.8

180200

12.413.8

12.714.1

12411379

15001660

40.244.5

30003330

80.489.2

Table 8. NPS 1 / DN 25 Pad Valve Capacities of 0.97 Specific Gravity Nitrogen


CV = 1 CV = 2 CV = 4 CV = 7.5 CV = 10psig bar kg/cm2 kPa SCFh Nm3/h SCFh Nm3/h SCFh Nm3/h SCFh Nm3/h SCFh Nm3/h25304050

1.72.12.83.4

1.762.112.813.52

172207276345

1330151018702280

35.640.550.161.1

2670302037504570

71.680.9101122

5350605075109140

143162201245

10,00011,30014,00017,100

268303375458

13,00015,10018,70022,800

348405501611

60708090100

4.14.85.56.26.9

4.224.925.626.337.03

414483552621690

26903090349039004300

72.182.893.5105115

53806180699078008600

144166187209230

10,70012,30013,90015,60017,200

287330373418461

20,10023,20026,20029,20032,200

539622702783863

26,90030,00034,90039,00043,000

721804935

10451152

110120130140150

7.68.39.09.710.3

7.738.449.149.8410.55

7598278979651034

47005100551059106310

126137148158169

941010,20011,00011,80012,600

252273295316338

18,80020,40022,00023,60025,200

504547590632675

35,30038,30041,30044,30047,300

9461026110711871268

47,00051,00055,10059,10063,100

12601367147715841691

160170180190200

11.011.712.413.113.8

11.2511.9512.6513.3614.06

11031172124113101379

67107120752079208320

180191202212223

13,40014,20015,00015,80016,600

359381402423445

26,80028,40030,00031,70033,300

718761804850892

50,30053,40056,40059,40062,400

13481431151215921672

67,10071,20075,20079,20083,200

17981908201521232230

Typical accuracy when flowing 5 to 70% of table value is ± 0.5 inch w.c. / 1 mbar.

Table 9. NPS2 / DN 50 Pad Valve Capacities of 0.97 Specific Gravity Nitrogen


CV = 20 CV = 45 CV = 60psig bar kg/cm2 kPa SCFh Nm3/h SCFh Nm3/h SCFh Nm3/h25304050

1.72.12.83.4

1.762.112.813.52

172207276345

26,70030,20037,50045,700

71680910051225

60,20068,10084,500102,800

1613182522652755

80,00090,800112,700137,100

2144243330203674

60708090100

4.14.85.56.26.9

4.224.925.626.337.03

414483552621690

53,80061,80069,90078,00086,000

14421656187320902305

121,000139,200154,400175,500193,600

32433731413847035188

161,400185,600209,800234,000258,200

43264974562362716920

125150175200

8.610.312.113.8

8.7910.5512.3114.06

862103412071379

102,100126,300142,400166,500

2736338538164462

238,900284,200329,400347,700

6403761788289318

306,500378,900427,200499,600

821410,15511,44913,389

Typical accuracy when flowing 5 to 70% of table value is ± 0.5 inch w.c. / 1 mbar.

Bulletin 74.3:ACE97

8

Table 10. NPS 1 / DN 25 Depad Valve Capacities of 1.0 Specific Gravity Air

DIFFERENTIAl PRESSuRE(1)

FlOW CAPACITy IN SCFh / Nm3/h OF 1.0 SPECIFIC GRAVITy AIR

Cv = 3 Cv = 6 Cv = 12 Cv = 17

Inch w.c. mbar SCFh nm3/h SCFh nm3/h SCFh nm3/h SCFh nm3/h

2345

571012

180220250280

4.85.96.77.5

360440510570

9.611.813.715.3

730890

10301150

19.623.927.630.8

1030126014601630

27.633.839.143.7

678910

1517202225

310340360380400

8.39.19.610.210.7

630680730770810

16.918.219.620.621.7

12601360146015401630

33.836.439.141.343.7

17901930206021902310

48.051.755.258.761.9

1214161820

3035404550

440480510540570

11.812.913.714.515.3

890960

103010901150

23.925.727.629.230.8

17801930206021902300

47.751.755.258.761.6

25302730292031003270

67.873.278.383.187.6

2224262830

5560657075

600630650680700

16.116.917.418.218.8

12101260131013601410

32.433.835.136.537.8

24202520263027302820

64.967.570.573.275.6

34303580372038704000

91.995.999.7104107

1.0 psig1.1 psig1.2 psig1.3 psig1.4 psig

6976839097

670710740770800

18.019.019.820.621.4

13501420148015401600

36.238.139.741.342.9

27102840297030903210

72.676.179.682.886.0

38404030421043804550

103108113117122


103110117124131

830850880910930

22.222.823.624.424.9

16601710177018201870

44.545.847.448.850.1

33203430354036403740

89.091.994.997.6100

47104870502051605300

126130134138142


138145152159165

960980100010301050

25.726.326.827.628.1

19201970201020602100

51.552.853.955.256.3

38403940403041204210

103106108110113

54405580571058405970

146149153156160

2.5 psig2.6 psig2.7 psig2.8 psig

172179186193

1070109011101130

28.729.229.730.3

2150219022302270

57.658.759.860.8

4300438044704550

115117120122

6090621063306450

163166170173

1. Always use the differential pressure between tank pressure (depad setpoint) and vent header (vapor recovery) pressure to calculate flow through the depad valve.

Bulletin 74.3:ACE97

9


DIFFERENTIAl PRESSuRE(1)FlOW CAPACITy IN SCFh / Nm3/h OF 1.0 SPECIFIC GRAVITy AIR

Cv = 20 Cv = 35 Cv = 70

Inch w.c. mbar SCFh nm3/h SCFh nm3/h SCFh nm3/h

2345

571012

1210149017201920

32.439.946.151.5

2130260030103360

57.169.780.790.0

4260521060206730

114140161180

678910

1517202225

21002270243025802720

56.360.865.169.172.9

36803980426045104760

98.6107114121128

73707970852090309520

198214228242255

1214161820

3035404550

29803220344036503840

79.986.392.297.8103

52105630602063806730

140151161171180

10,43011,27012,04012,77013,470

280302323342361

2224262830

5560657075

40304210438045504710

108113117122126

70607370767079608240

189198206213221

14,12014,75015,35015,93016,490

378395411427442


6976839097

45204740496051605350

121127133138143

79208310868090309370

212223233242251

15,80016,60017,30018,00018,700

423445464482501


103110117124131

55405720590060706240

148153158163167

970010,00010,30010,60010,900

260268276284292

19,40020,00020,60021,20021,800

520536552568584


138145152159165

64006560672068707020

172176180184188

11,20011,40011,70012,00012,200

300306314322327

22,40022,90023,50024,00024,500

600614630643657


172179186193

7170731074507590

192196200203

12,50012,70013,00013,200

335340348354

25,00025,50026,00026,500

670683697710


Bulletin 74.3:ACE97

10



Cv = 90 Cv = 115 Cv = 140


2345

571012

5400670077008600

145180206230

700085009800

11,000

188228263295

850010,40012,00013,400

228279322359

678910

1517202225

940010,20010,90011,60012,200

252273292311327

12,10013,00013,90014,80015,600

324348373397418

14,70015,90017,00018,00019,000

394426456482509

1214161820

3035404550

13,40014,40015,40016,40017,300

359386413440464

17,10018,50019,70020,90022,100

458496528560592

20,80022,50024,00025,50026,900

557603643683721

2224262830

5560657075

18,10018,90019,70020,40021,200

485507528547568

23,20024,20025,20026,10027,100

622649675699726

28,20029,50030,70031,80032,900

756791823852882


6976839097

20,30021,30022,30023,20024,100

544571598622646

26,00027,30028,50029,60030,800

697732764793825

31,60033,20034,70036,10037,500

8478909309671005


103110117124131

24,90025,70026,50027,30028,100

667689710732753

31,80032,90033,90034,90035,900

852882909935962

38,80040,10041,30042,50043,700

10401074110711391171


138145152159165

28,80029,50030,20030,90021,600

772791809828579

36,80037,70038,60039,50040,300

9861010103410591080

44,80045,90047,00048,10049,100

12011230126012891316


172179186193

32,20032,90033,50034,100

863882898914

41,20042,00042,80043,600

1104112611471168

50,10051,10052,10053,100

1343136913961423


Bulletin 74.3:ACE97

11



Cv = 150 Cv = 200 Cv = 280


2345

571012

910011,10012,90014,400

244297346386

12,10014,90017,20019,200

324399461515

17,00020,80024,10026,900

456557646721

678910

1517202225

15,80017,00018,20019,30020,400

423456488517547

21,00022,70024,30025,80027,200

563608651691729

29,50031,80034,00036,10038,100

7918529119671021

1214161820

3035404550

22,30024,10025,80027,30028,800

598646691732772

29,80032,20034,40036,50038,400

799863922978

1029

41,70045,00048,10051,10053,800

11181206128913691442

2224262830

5560657075

30,20031,60032,90034,10035,300

809847882914946

40,30042,10043,80045,50047,100

10801128117412191262

56,50059,00061,40063,70065,900

15141581164617071766


6976839097

33,90035,60037,20038,70040,100

909954997

10371075

45,20047,40049,60051,60053,500

12111270132913831434

63,30066,40069,40072,20075,000

16961780186019352010


103110117124131

41,60042,90044,30045,50046,800

11151150118712191254

55,40057,20059,00060,70062,400

14851533158116271672

77,60080,20082,60085,10087,400

20802149221422812342


138145152159165

48,00049,20050,40051,50052,600

12861319135113801410

64,00065,60067,20068,70070,200

17151758180118411881

89,70091,90094,10096,20098,300

24042463252225782634


172179186193

53,70054,80055,90056,900

1439146914981525

71,70073,10074,50075,900

1922195919972034

100,300102,300104,300106,200

2688274227952846


Bulletin 74.3:ACE97

12

Table 14. Type ACE97 Pad/Depad Valve Dimensions

NPS 1 x 1 x 1 OR 2 / DN 25 x 25 x 25 OR 50 WITh OPTIONS

DIMENSIONS IN INCh / mm FOR NPS 1 x 1 x 1 OR 2 / DN 25 x 25 x 25 OR 50 BODy WITh OPTIONS

A B C

nPT Cl150 RF nPT Cl150 RF nPT Cl150 RF

9.4 / 239 11.5 / 292 0.3 / 7.6 2.8 / 71 6.3 / 160 8.8 / 224

Figure 5. Type ACE97 Pad/Depad Valve Dimensions

NPS 1 x 3 x 3 OR 4 / DN 25 x 80 x 80 OR 100 WITh OPTIONS

DIMENSIONS IN INCh / mm FOR NPS 1 x 3 x 3 OR 4 / DN 25 x 80 x 80 OR 100 BODy WITh OPTIONS

A B C

1 nPT NPS 1 / DN 25,Cl150 RF

NPS 1-1/2 / DN 40, Cl150 RF

NPS 2 / DN 50,Cl150 RF 3 NPT

NPS 3 or 4 / DN 80 or 100, Cl150 RF

4 NPTNPS 3 or 4 / DN 80 or 100,Cl150 RF

11.5 / 292 16.9 / 429 17.2 / 437 17.4 / 442 5.3 / 135 4.9 / 124 5.8 / 147 15.6 / 396

24.1 / 612

VAPOR RECOVERy

CONNECTION

12.3 / 312

C1/2 NPT SENSING

CONNECTIONB

1 nPT BlANKETING GAS

CONNECTIONA 6.3 / 160

TANK CONNECTION

7.2 / 183

2.5 / 64

8.1 / 206

1/2 NPT SENSING

CONNECTION

12.5 / 318

18.7 / 174 12.5 / 318

NPS 1 / DN 25, Cl150 RF VAPOR

RECOVERy CONNECTION

B

1 nPT BlANKETING GAS

CONNECTION A 3.0 / 76

1/2 NPT SENSING

CONNECTION

TANK CONNECTION

C

22.5 / 572

6.0 / 152

7.2 / 183

2.5 / 64

INChES / mm

1/2 NPT SENSING CONNECTION

Bulletin 74.3:ACE97

13

B

A

C

3.0 / 76

13.3 / 337

12.5 / 318

7.3 / 185

2.5 / 64

8.0 / 203

DIMENSIONS IN INCh / mm FOR NPS 1/2 x 1 x 1 OR 2 / DN 15 x 25 x 25 OR 50 BODy WITh OPTIONSA B C

1/2 NPT Without Filter

1/2 NPT With Filter

NPS 1/2 / DN 15,Cl150 RF

Without Filter

NPS 1/2 / DN 15,Cl150 RF With Filter

1 nPTNPS 1 or 2 / DN 25 or 50,Cl150 RF

1 nPTNPS 1 or 2 / DN 25 or 50, Cl150 RF

10.4 / 264 14.2 / 360 14 / 356 15.9 / 404 3.7 / 93 8 / 203 6.3 / 160 10.6 / 269

Figure 5. Type ACE97 Pad/Depad Valve Dimensions (continued)

DIMENSIONS IN INCh / mm FOR NPS 1/2 x 1 x 2 / DN 15 x 25 x 50 BODy WITh SINGlE ARRAy MANIFOlDA B C

1/2 NPT Without Filter

1/2 NPT With Filter

NPS 1/2 or 1 / DN 15 or 25, Cl150 RF

Without Filter

NPS 1/2 or 1 / DN 15 or 25,Cl150 RF With Filter

1 nPTNPS 1 or 2 / DN 25 or 50, Cl150 RF

NPS 2 / DN 50,

Cl150 RF

10.4 / 264 14.2 / 360 14 / 356 15.9 / 404 3.7 / 93 8 / 203 12.6 / 320

NPS 1/2 x 1 x 1 OR 2 / DN 15 x 25 x 25 OR 50 WITh OPTIONS

BlANKETING GAS CONNECTION VAPOR

RECOVERy CONNECTION

TANK CONNECTION

1/2 NPT SENSING

CONNECTION

B

A

C

3.0 / 76

13.3 / 337

12.5 / 318

8.0 / 203

NPS 1/2 x 1 x 2 / DN 15 x 25 x 50 WITh SINGlE ARRAy MANIFOlD

BlANKETING GAS CONNECTION

TANK CONNECTION

NPS 1 OR 2 / DN 25 OR 50,

Cl150 RF VAPOR RECOVERy

CONNECTION

INChES / mm

Table 14. Type ACE97 Pad/Depad Valve Dimensions (continued)

Bulletin 74.3:ACE97

14

Information Required

In order to complete the specification worksheet, the following information must be provided. Operating pressures and temperatures must be within the ranges listed within this bulletin.

Please specify measurement units: Imperial (USA) _____ or Metric _____

Pad Information 1. Maximum Inert Gas Flow - SCFH or Nm3/hr: _____________ or Pad Valve Cv: _____________

2. Inert Gas: _____________ or Inert Gas Specific Gravity: _____________

3. Supply Pressure, Inert Gas - Maximum: _____________ Minimum: _____________

4. Operating Temperature - °F: _____________ or °C: _____________

5. Pad Setpoint: _____________ inches w.c. or mbar

Depad Information 6. Maximum Vent Gas Flow - SCFH or Nm3/hr: _____________ or Depad Valve Cv: _____________

7. Vent Gas Specific Gravity: _____________

8. Vent Gas Temperature - °F: _____________ or °C: _____________

9. Depad Setpoint: _____________ inches w.c. or mbar

10. Relief Header Pressure at Depad Outlet, Flowing Conditions, Maximum: _________ inches w.c. or mbar

11. Stored Liquid Flash Point - °F: _____________ or °C: _____________ or

Stored Liquid Boiling Point - °F: _____________ or °C: _____________ (Require at least one for API sizing)

12. Storage Temperature of Product - °F: _____________ or °C: _____________

13. Depad Materials of Construction Compatible with Stored Liquid and Vapors Metals: 316 SST or _____________

Elastomers: Nitrile (NBR) _____, Fluorocarbon (FKM) _____, Ethylenepropylene (EPDM-FDA) _____,

Perfluoroelastomer (FFKM) _____, or Other __________________

14. Product to be Blanketed: _____________

15. Optional Equipment Required: _____________

16. Emergency Pressure Vent Setpoint: _____________ inches w.c. (separate device)

Connections 17. Inert Gas Supply - NPT: ___________ Flanged: ___________ Other (specify): ___________

18. Tank Connection - NPT: ___________ Flanged: ___________ Other (specify): ___________

19. Header Connection - NPT: ___________ Flanged: ___________ Other (specify): ___________

Notes

If the required Pad or Depad valve Cv value is unknown, refer to the Sizing section for more details or contact your local Sales Office. If the required Pad or Depad valve Cv value is known, continue with the Ordering worksheet.

Bulletin 74.3:ACE97

15

Ordering GuidePad and Depad Valve Bodies (Select One) CF8M Stainless steel CF3M Stainless steel

Body Size and Coefficient (Select One from Each Category) Pad Valve Body NPS 1/2 / DN 15 NPS 1 / DN 25 NPS 2 / DN 50 Cv = 0.4 Cv = 1 Cv = 20 Cv = 0.2 Cv = 2 Cv = 45 Cv = 4 Cv = 60 Cv = 7.5 Cv = 10 Depad Valve Body NPS 1 / DN 25 NPS 2 / DN 50 Cv = 3 Cv = 20 Cv = 6 Cv = 35 Cv = 12 Cv = 70 Cv = 17

NPS 3 / DN 80 NPS 4 / DN 100 Cv = 90 Cv = 150 Cv = 115 Cv = 200 Cv = 140 Cv = 280

Pad Inlet Connection (Select One)NPS 1/2 / DN 15 Body Size NPT CL150 RF threaded flange and nipple

NPS 1 / DN 25 Body Size NPT CL150 RF threaded flange and nipple

NPS 2 / DN 50 Body Size NPT CL150 RF threaded flange and nipple

Tank Connection (Must Match or be Larger than the Largest Pad or Depad Valve Body Size) NPS 1 / DN 25, CL150 RF NPS 2 / DN 50, CL150 RF NPS 3 / DN 80, CL150 RF NPS 4 / DN 100, CL150 RF

Diaphragm (Select One) Nitrile (NBR) Ethylenepropylene (EPDM - EPA) Fluorocarbon (FKM)

Other Elastomers (Select One) Nitrile (NBR) Ethylenepropylene (EPDM - EPA) Fluorocarbon (FKM) Perfluoroelastomer (FFKM)

Control Pressure Ranges - Pad Setpoint and Depad Setpoint (above Pad Setpoint) (Select One) Pad Setpoint: 0.5 to 3-inches w.c. / 1 to 7 mbar

Depad Setpoint: 4 to 10-inches w.c. / 10 to 25 mbar Pad Setpoint: 0.5 to 7-inches w.c. / 1 to 17 mbar

Depad Setpoint: 4 to 6-inches w.c. / 10 to 15 mbar Pad Setpoint: 3 to 13-inches w.c. / 7 to 32 mbar

Depad Setpoint: 4 to 16-inches w.c. / 10 to 40 mbar Pad Setpoint: 4 to 10-inches w.c. / 10 to 25 mbar

Depad Setpoint: 16 to 78-inches w.c. / 40 to 194 mbar Pad Setpoint: 0.5 to 1.4 psig / 0.03 to 0.10 bar

Depad Setpoint: 0.25 to 1 psig / 0.02 to 0.07 bar Pad Setpoint: 1 to 2.2 psig / 0.07 to 0.15 bar

Depad Setpoint: 0.25 to 2 psig / 0.02 to 0.14 bar

S.A.M. (Single Array Manifold) Tank Connection for a Single Nozzle Tank Connection (Optional) Yes No

Options (Select as many as Desired) Pad inlet pressure gauge, stainless steel Dwyer® control pressure gauge, 15 psig / 1.0 bar max 2 Dwyer® control pressure gauges (to span pad and

depad setpoints) Control pressure gauge, above 4-inch w.c. / 10 mbar range,

4-inch / 102 mm diameter (max pressure limited to 130% of gauge span) with shutoff valve, stainless steel

2 control pressure gauges, same as above (to span pad and depad setpoints)

Sensing line purge, stainless steel Main line purge, stainless steel Dwyer® XP pressure switch, aluminum housing Pad main line check valve for pad valve, stainless steel Diagnostic and inlet gauges (NPS 1 or 2 / DN 25 or 50 pad

valve only)

Note: Standard sense line connection is 1/2 NPT.Dwyer® is a mark owned by Dwyer Instruments Inc.

Bulletin 74.3:ACE97

©Emerson Process Management Regulator Technologies, Inc., 2002, 2013; All Rights Reserved

The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC, a business of Emerson Process Management.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.

Industrial Regulators

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Natural Gas Technologies

Emerson Process ManagementRegulator Technologies, Inc.

USA - HeadquartersMcKinney, Texas 75069-1872, USATel: +1 800 558 5853Outside U.S. +1 972 548 3574

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TESCOM

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For further information visit www.fisherregulators.com

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