Instruction manual

A31A Valve
Instruction Manual
Form 5291
March 2008
12
Figure 7. Anti-Blowout Design Details
C0758-1/IL
CUTAWAY, INTERNAL DETAILS
WARNING
Avoid personal injury or property
damage caused by the impact of a
falling or tipping of a large valve.
Support large valves during
maintenance.
2. Lay the valve flat on a work bench in a secure
position with the retaining ring (key 18) and retaining
ring screws (key 19) facing up. Properly secure the
valve on a suitable worktable so it cannot slip, twist,
or fall during maintenance. Remove all retaining ring
screws.
3. Remove the retaining ring by placing a socket
head cap screw from the retaining ring into each of
the two retaining ring jacking screw holes. Slowly
turn the screws until the retaining ring has been lifted
from the valve body. Remove the retaining ring to
expose the seal in the T-slot area of the valve body.
Note
The Type A31A is available with
different seal designs and
components. See figure 3 to identify
the specific seal design.