Data Sheet for Product

Technical Bulletin 656 Powermite Valve with 3-inch Top Rebuilding
Document Number 155-240P25
March 7, 2005
Page 2 Siemens Industry, Inc.
Diaphragm and
Quad Ring
Replacement,
Continued
CAUTION:
Hold the piston plate securely. Removing the E-ring releases the tension on
the piston plate and spring.
4. Use a screwdriver to release the E-ring from the groove in the stem.
5. Remove the washer and piston plate from the valve stem and lift out the valve
spring and the spring washer (10 to 15 psi spring only).
6. Remove the push-on retaining ring with a screwdriver or long nose pliers.
7. Remove the quad ring retainer for access to the upper quad ring seal.
8. Move the valve stem up and down a few times before removing the quad ring. You
may need a pick to dislodge the quad ring from the valve bonnet.
NOTE: Siemens Building Technologies does not recommend field replacement of the
lower quad ring, the lower quad ring retainer, and spring.
Figure 1. Actuator Assembly for Diaphragm and Quad Ring Replacement.