Fisher A31D Double-Flange Butterfly Valve
The Fisher A31D is a double-flange, high performance Butterfly valve featuring either a splined drive shaft or a keyed drive shaft. The A31D is used in throttling or on/off service and is available in NPS 3 through 12, CL150 and CL300.
FEATURES
1.The pressure-assisted seal design provides tight shutoff and permits the use of smaller actuators in applications requiring full ASME B16.34 shutoff capabilities.
2.Shaft-blowout protection is designed into the A31D valve.
3.The optional ENVIRO-SEAL™ packing system is designed with improved sealing, guiding, and loading force transmission.
4.This valve will meet your actuator needs with a choice of splined or keyed shaft connections.
5.Trim and bolting materials are available for applications involving sour liquids and gases.
SPECIFICATIONS
Certifications
PED, CRN, Fugitive Emission, NACE, ATEX, CUTR, Fire Safe
Critical Service
General Service
Flow Characteristics
Linear
Material
Carbon Steel, Stainless, Alloy
Operating Temperature
Standard Temperature, High Temperature
Pressure Class
ASME
Process Connection Type
Double Flanged
Shutoff Class
Class VI (FCI 70-2), MSS SP-61
Valve Size
NPS 3, NPS 4, NPS 6, NPS 8, NPS 10, NPS 12
Valve Size Standard
NPS
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