Page 22 / 45
REV. STV20110519
Sterivalve
®
12 (1/2”), 25 (1”) and 38 (1 ½”)
Sterivalve
®
51 (2”) and 76 (3”)
1. Open the valve, manually or pneumatically.
2. Unscrew the four screws and separate the valve
housing from the actuator.
3. Set the actuator to the closed position.
4. Inspect diaphragm. The purpose of the inspection
is to detect visible signs of wear, cracks, significant
deformation or discoloration. Replace the
diaphragm immediately if any fault is detected.
Remove the old diaphragm, by turning it
counterclockwise. It is recommended to exchange
the rubber gasket. Fit the new diaphragm by turning
it clockwise.
5. Set the actuator to the open position.
6. Fit the valve housing and actuator together with
the four screws.
7. Close the valve. The valve is now ready for use.
1. Open the valve, manually or pneumatically.
2. Unscrew the clamp with the wing-nut and separate
the valve housing from the actuator.
3. Set the actuator to the closed position.
4. Inspect diaphragm. The purpose of the inspection
is to detect visible signs of wear, cracks, significant
deformation or discoloration. Replace the diaphragm
immediately if any fault is detected. Remove the
diaphragm and fit the new one in place. Some force
may be needed to push the diaphragm over the
bottom plate on the piston rod (refer to section 2.1.2)
5. Set the actuator to the open position.
6. Fit the valve housing and actuator together with the
clamp. Tighten the clamp manually. Do not use tools.
The diaphragm may be damaged if the clamp is over
tightened.
7. Close the valve. The valve is now ready for use.
