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REV. STV20110519
2.2
Assembly Procedure
2.2.1 Pneumatically operated valves
In order to install the pneumatic actuator to the valve, follow these steps:
1-Attach diaphragm to actuator stem, or screw the valve diaphragm to the actuator stem. Refer
to section 2.1.
2-Actuate the actuator to the open position. If the actuator is set-up as normally closed, actuate
the actuator to the open position. If the actuator is set-up as normally open, continue to step 3.
3-Insert actuator with diaphragm into valve housing.
4-Secure clamp around actuator and valve body. For
51
(2”) and
76
(3”) secure the 4 bolts that
attach the actuator to the valve body. Tighten the bolts.
5-Actuate the actuator to the closed position.
6- For valves with PTFE diaphragms make sure support gasket/o-rings are installed with the
diaphragm. See figure 14. See additional installation procedures for PTFE diaphragms in section
2.2.3.
Figure 14: PTFE diaphragm o-rings (left) and support gasket (right)
2.2.2 Manually operated valves
In order to install the manual actuator to the valve, follow these steps:
1- Turn the actuator hand wheel clockwise (closed).
2- Attach diaphragm to actuator stem or, screw the valve diaphragm to the actuator stem. Refer
to section 2.1.2.
3- Turn the actuator hand wheel counterclockwise (open).
4- Insert actuator with diaphragm into valve body.
O-ring
Support
gasket
