01 specifications

8/3/2019 01 Specifications

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Educational Services

Control ValveSpecifications


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2Educational Services - Duplication Prohibited

Control Valve Assembly


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Function in the Loop

I/P

PT

PIC

P

loop

Figure 1-2. Control Valve Role in the Control Loop


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Major Components

Packing Flange

Valve Plug Stem*

Actuator Yoke Locknut

Packing Box

Valve Plug*

Cage*

Seat Ring Gasket

Seat Ring*

Packing Flange Nut

Bonnet

Gaskets

Valve Body

Packing

essolid

*Valve Trim Components

Figure 1-3. Sliding Stem Control Valve Components


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Temperature Limits of Common Materials

Material Temperature Limit

Carbon Steel

(WCC, WCB)

-20 to 800 degrees F

Alloy steel, or chrome moly steel

C5

WC9

-20 to approximately 1200 degrees F

-20 to approximately 1100 degrees F

CF8M Stainless Steel

(316 Stainless Steel)

-425 to 1500 degrees F

Figure 1-5. Temperature Limits Of Common Valve Body And Bonnet Materials


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End Connection: Threaded


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End Connection: Welded


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End Connection: Flanged


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End Connection: Separable Flange & RTJ


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End Connection: Wafer Style


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Typical Cv (Flow Capacity) Chart

Flow Down

DESIGN EDCLASSES 125-600

Equal Percentage Cage

Full Sized Restricted

FLOW COEFFICIENTS(ANSI/ISA/IEC)

For additional body information seeBulletin 51.1:ED

qual Percentage Equal PercentageCharacteristicPort

DiameterTotalTravel

Valve opening __Percent of Total TravelBodSize(In.) In. mm In. mm 10 20 30 40 50 60 70 80 90 100

FL

Cv&1-1/4 1-5/16 33.3 3/4 19 .783 1.54 2.20 2.89 4.21 5.76 7.83 10.9 14.1 17.2 .88

1-1/2 1-7/8 47.6 3/4 19 1.52 2.63 3.87 5.41 7.45 11.2 17.4 2/45 30.8 35.8 .84

2 2 5/16 58.7 1 1/8 29 1.66 2.93 4.66 6.98 10.8 16.5 25.4 37.3 50.7 59.7 .85

2-1/2 2 7/8 73.0 1 1/2 38 3.43 7.13 10.8 15.1 22.4 33.7 49.2 71.1 89.5 99.4 .84

3 3 7/16 87.3 1-1/2 38 4.32 7.53 10.9 17.1 27.2 43.5 66.0 97.0 120 136 .82

4 4 3/8 111.1 2 51 5.85 11.6 18.3 30.2 49.7 79.7 125 171 205 224 .82

6 7 177.8 2 51 12.9 25.8 43.3 67.4 104 162 239 316 368 394 .85

8 8 203.2 2 51 18.5 38.0 58.4 86.7 130 189 268 371 476 567 .85

8 8 203.2 3 76 27.0 58.1 105 188 307 478 605 695 761 818 .86

1 1/2 1-5/16 33.3 3/4 19 1.112 1.56 2.22 3.10 4.27 6.17 9.01 13.1 18.2 23.1 .91

2 1-5/16 33.3 3/4 19 .923 1.42 2.09 2.84 4.11 5.83 8.58 12.8 18.5 24.3 .88

Cv = GPM Of Water At 60 degrees F with ? P of 1 psi

Figure 1-11. Example of a Typical Sizing Page


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Cv Comparison by Valve Type and Size

Valve Size Travel Percent Rated Cv

Sliding-StemTortuous Path

Rotary-ShaftStreamlined

Flow Path

1 inch 90 20 29

10 3 0.5

8 inch 90 500 1180

10 20 5

Figure 1-12. Relative Liquid Capacity Of Sliding-Stem And Rotary-Shaft Control Valves


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Flow Characteristics

ControlValve Cv,% ofMaximum

Quick Opening

Linear

EqualPercentage

Valve Stem Position, %

100

0

0 100

flchar

Figure 1-13. Flow Characteristics


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ANSI and Fisher Shutoff ClassesANSI/FCI Leak Classes

ANSI

Class

Maximum Leakage Medium Pressure

Class II 0.5% valve capacity at full travel Air Lower of service

P(3) or 50 psidClass III 0.1% valve capacity at full travel Air Lower of service P(3) or 50 psid

Class IV 0.01% valve capacity at full travel Air Lower of service P(3) or 50 psid

Class V(1) 0.0005 mL/minute/psid/inch port

diameter

Water Service P(3)

Std. Air Test

for SS Valves

(SAT-SSV)(2)

Std 0.05 mL/minute/psid/inch port

diameter

Air Lower of service P(3) or 50 psid

Std. Air Test

for Rotary

Valves (2)

Std 2.0 mL/minute/psid/inch port

diameter

Air Lower of service P(3) or 50 psid

Port Diameter Bubbles

per

mL

perIn mm minute minute

Class VI To 1 25 1 0.15 Lower of service P or 50 psid

1 1/2 38 2 0.30

2 51 3 0.45 Air or N2

2 1/2 64 4 0.60

3 76 6 0.90

4 102 11 1.70

6 152 27 4.00

8 203 45 6.751. ANSI/FCI Class V seat leak water test not available for oxygen-cleaned, cryogenic, or any valves cleaned per FGS

8A11. Any disassembly to dry and/or re-clean the valve would invalidate the seat leak test. See PS Sheet 59.1:004Cfor optional tests.

2. Fisher Controls leakage classes.3. Specify service P when ordering.

Special (Fisher) Leak ClassLeakage Class Maximum

Leakage

Test

Medium

Test

Pressure

Test Procedure

TSO (Tight Shutoff) No seat leakage attime of shipment

Water Service P(3) ANSI/FCI Class V TestProcedure B

3. Specify service P when ordering.

Figure 1-14. Control Valve Seat Leakage Classifications


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FIN

01 specifications

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