Instruction manual

Instruction Manual
D500240X012
A31A Valve
October 2012
3
Educational Services
For information on available courses for the Fisher POSI-SEAL A31 NPS 3 through 12 butterfly valve, as well as a variety
of other products, contact:
Emerson Process Management
Educational Services, Registration
P.O. Box 190; 301 S . 1
st
Ave.
Marshalltown, IA 50158-2823
Phone: [phone] or
Phone: [phone]
FAX: [phone]
e-mail: [e-mail]
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve
assembly where service conditions could exceed the limits given in this manual or on appropriate nameplates. Use
pressure-relieving devices as required by government or accepted industry codes and good engineering practices.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
The valve configuration and construction materials are selected to meet particular pressure, temperature, pressure drop,
and controlled fluid conditions. Because pressure drop and temperature range capabilities limit some combinations of
materials, do not apply any other conditions to the valve without first contacting your Emerson Process Management sales
office.
The maximum allowable i nlet pressures for A31A valves are consistent with the applicable pressure/ temperature
ratings except where limited by material capabilities shown in figure 2 and table 2.
Adjusting the Actuator Travel Stops
WARNING
The edges of a rotating valve disk have a shearing effect that may result in personal injury. To avoid personal injury, keep
clear of the disk edges when rotating the disk.