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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

1 2 3 4 5 6 ... 11 12

Podsumowanie treści

Strona 1 - Features

www.Fisher.comFisherr POSI-SEALt A31D Double-FlangeHigh-Performance Butterfly ValveThe Fisher A31D double-flange high-performancebutterfly valve provi

Strona 2 - Table of Contents

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 201410Figure 5. Dimensions and Weights, CL150 Double-Flange Valves (also see tables 5 and 7)DC

Strona 3

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 201411Figure 6. Dimensions and Weights, CL300 Double-Flange Valves (also see tables 6 and 7)DC

Strona 4 - Configurations

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 201412Table 7. Valve WeightsSIZE CL150 CL300NPS kg lb kg lb3 15 33 28 634 25 56 35 776 34 76 6

Strona 5

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20142 Excellent Emissions Capabilities-- The optionalENVIRO-SEAL™ packing system is designed

Strona 6

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20143A31D Valve Specifications and Materials of ConstructionTable 1. Fisher A31D Valve Specifi

Strona 7

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20144Figure 1. Available Seal ConfigurationsNotes:This unidirectional seal must be installed s

Strona 8

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20145Figure 2. Blowout Protection (NPS 3 through 24)PACKINGFLANGEANTI-BLOWOUTFLANGESHAFTSHOULD

Strona 9

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20146Table 2. Materials of Construction and Temperature RatingsCOMPONENT AND MATERIAL OF CONST

Strona 10 - Product Bulletin

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20147Table 3. Valve/Actuator CombinationsTEMPERATURE RANGESELECTION GUIDELINES1052, 1061, or 2

Strona 11

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20148Table 4. Valve Body Material Pressure/Temperature Ratings(1)TEMPERATURERANGEPRESSURE RANG

Strona 12

A31D ValveD500213X012Product Bulletin21.1:A31DSeptember 20149Figure 4. Maximum Pressure/Temperature Ratings for Soft Seal, NOVEX Seal and Phoenix III

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