Fisher® POSI-SEAL A31A High-Performance Butterfly Valve0 pages

Product Bulletin

A31A Valve

21.1:A31A
October 2013

D500191X012

Fisherr POSI-SEALt A31A
High-Performance Butterfly Valve
The Fisher A31A High Performance Butterfly Valve
provides outstanding performance under extreme
pressure and temperature conditions. The A31A valve
maintains tight shutoff and is available in a fire-tested
version.
The A31A valve is available as either a flangeless (wafer
style) design or as a single-flange (lugged) design. A
keyed drive shaft combines with a variety of
handlevers, handwheels, or pneumatic piston
diaphragm actuators to make the A31A a reliable,
high-performance butterfly valve for a variety of on-off
applications in the various process industries.
The A31A valve can be supplied with one of several
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 for the
specific valve type.
Unless otherwise noted, all NACE references are to
NACE MR0175-2002.

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W9134-2

FISHER A31A VALVE WITH BETTIS™ ACTUATOR AND
DVC6200 FIELDVUE™ DIGITAL VALVE CONTROLLER