Data Sheet

A31A Valve
D500191X012
Product Bulletin
21.1:A31A
October 2013
9
Installation
Recommended installation for the A31A valve is with
theshaftupstreamoftheseal(retainingring
downstream from the high pressure side of the valve).
The standard soft seal offers bubble-tight, bidirectional
shutoff. To meet the performance requirements of
many of today's fire-tested requirements, a Phoenix III
valve must be installed in the preferred valve
orientation. The NOVEX seals are uni-directional and
should be installed with the shaft upstream of the seal.
For assistance in selecting the appropriate
combination of actuator action and open valve
position, consult your Emerson Process Management
sales office.
Dimensions and weights for wafer-style and
single-flange valves are shown in figures 5, 6, 7 and 8.