Data Sheet

ManualsBrandsEmerson Manualsmotor vehicle accessories & componentsA31D

www.Fisher.com

Fisherr POSI-SEALt A31D Double-Flange

High-Performance Butterfly Valve

The Fisher A31D double-flange high-performance

butterfly valve provides outstanding performance

under extreme pressure and temperature conditions.

The A31D valve is available with face-to-face

dimensions conforming to ISO 5752 Butterfly Valve

Short (CL150) or Long (CL300) Series (for other

face-to-face dimension requirements, consult your

Emerson Process Management sales office). A splined

shaft combines with a variety of Fisher

spring-and-diaphragm or pneumatic piston actuators.

A keyed drive shaft combines with a variety of

handlevers, handwheels, or pneumatic double-acting

or spring-return piston actuators. These combinations

make the A31D valve a reliable, high-performance

butterfly valve for both throttling and on-off

applications in the process industries.

TheA31Dvalvecanbesuppliedwithoneofseveral

dynamic seals (figure 1) that can be used in a variety of

demanding applications. With the appropriate seal

selection and materials of construction, the

pressure-assisted seal provides excellent shutoff

against the full ASME class pressure range.

Features

 Excellent Shutoff Integrity-- The pressure-assisted

seal design provides tight shutoff and permits the

use of smaller actuators in applications requiring full

ASME B16.34 shutoff capabilities.

 True Bi-directional Shutoff Performance-- A31D

valve design helps to ensure that the torque

necessary to open and close the valve is the same

regardless of the direction in which t he differential

pressure is applied.

X0704

Fisher A31D Valve with 2052 Actuator

 Safety-- Shaft-blowout protection is designed into

the A31D valve (figure 2). For NPS 3 through 12

valves, the packing follower and an anti-blowout

follower hold an anti-blowout gland securely around

the valve shaft. Under the anti-blowout gland, a

formed wire ring around the shaft completes the

protection design. For NPS 14 through 24 valves,

the anti-blowout gland fits securely over the valve

shaft which has been turned down to form a

circumferential shoulder that contacts the

anti-blowout gland.

A31D Valve

D500213X012

Product Bulletin

21.1:A31D

September 2014

Summary of content (12 pages)

PAGE 1
Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Fisherr POSI-SEALt A31D Double-Flange High-Performance Butterfly Valve The Fisher A31D double-flange high-performance butterfly valve provides outstanding performance under extreme pressure and temperature conditions.
PAGE 2
Product Bulletin A31D Valve 21.1:A31D September 2014   D500213X012 Excellent Emissions Capabilities-- The optional ENVIRO-SEAL™ packing system is designed with improved sealing, guiding, and loading force transmission. The ENVIRO-SEAL packing system can control emissions to below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million) for valves.  Sour Service Capability-- Trim and bolting materials are available for applications involving sour liquids and gases.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 A31D Valve Specifications and Materials of Construction Table 1. Fisher A31D Valve Specifications SPECIFICATION Valve Body Size NPS 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 24 Pressure Rating Consistent with CL150 and 300 per ASME B16.34(1) Valve Body Materials WCC Steel CF8M Stainless Steel Disk Materials CF8M Stainless Steel End Connections Mates with RF flanges per ASME B16.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Figure 1.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Figure 2.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Table 2.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Table 3.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Table 4. Valve Body Material Pressure/Temperature Ratings(1) TEMPERATURE RANGE PRESSURE RANGE WCC CF8M WCC CL150 Bar _C -254 to -29 --- 19.0 --- 49.6 -29 to 38 20 19.0 51.7 49.6 93 17.9 16.2 51.7 42.7 149 15.9 14.8 50.3 38.6 204 13.8 13.4 48.6 35.5 260 11.7 11.7 45.9 33.1 316 9.7 9.7 41.7 31.0 343 8.6 8.6 40.7 30.3 371 7.6 7.6 38.3 30.0 399 6.6 6.6 34.8 29.3 427 5.5 5.5 28.3 29.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Figure 4.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Figure 5. Dimensions and Weights, CL150 Double-Flange Valves (also see tables 5 and 7) B D T C E A K M 4X V J BOLT CIRCLE EACH SIDE 4X P THRU T H THRU J BOLT CIRCLE G HOLES S U R PACKING CLEARANCE N L KEY SQ. K OPTIONAL KEYED DRIVE SHAFT Table 5. CL150, Double-Flange Dimensions CL150 DIMENSION A, C, D, E, & H THROUGH U VALVE SIZE, NPS A B(3) C D E(3) G(3) H J (1) (2) 3 191 114 143 132 57.2 4 19.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Figure 6. Dimensions and Weights, CL300 Double-Flange Valves (also see tables 6 and 7) B D T C E A K M 4X V J BOLT CIRCLE EACH SIDE S R PACKING CLEARANCE 4X P THRU T H THRU J BOLT CIRCLE G HOLES N U L KEY SQ. K OPTIONAL KEYED DRIVE SHAFT Table 6. CL300, Double-Flange Dimensions VALVE SIZE, NPS CL300 DIMENSION A, C, D, E, & H THROUGH U A B(3) D E(3) G(3) C H J 3 210 180 143 121 90.2 8 22.
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Product Bulletin A31D Valve 21.1:A31D September 2014 D500213X012 Table 7.