Maintenance
Handwheel Operated Valves (903, 913, 963) Installation, Operation, and Maintenance Manual
13
Replace the valve diaphragm
1. Disassemble the valve.
For more information, see
2. Unscrew the diaphragm from the compressor by turning the diaphragm counterclockwise.
The replacement diaphragm should be identical in size and grade to the original
diaphragm.
3. If replacing a PTFE diaphragm, then follow these steps.
a) Install the new elastomer backing cushion over the tube nut.
b) Invert the PTFE diaphragm by pressing the center of the diaphragm face with your
thumbs while holding the edge of the diaphragm with your fingers.
c) Engage the threads of the diaphragm into the tube nut by rotating clockwise.
d) Continue rotating the PTFE diaphragm clockwise into the compressor while securing
the backing cushion from rotating.
Designed and Manufactured by ITT
