E. operation, Perform the following to close the valve, Perform the following to open the valve – APTech AZ4571 User Manual
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Operation Manual
Pneumatic Diaphragm Valves (NC)
E. Operation
1. Perform the following to close the valve.
a.
Vent the valve actuation pressure to atmospheric pressure. For the AK/AP/AZ3571 and
AK/AP/AZ4571, both actuation ports must be vented to atmospheric pressure.
b.
If an indicating switch option was installed, verify that the output signal changed states.
2. Perform the following to open the valve.
a.
Apply actuation pressure to the valve. For the AK/AP/AZ3571 and AK/AP/AZ4571,
actuation pressure on port “2” or on both ports “1” and “2” will fully open the valve and
actuation pressure only on port “1” will partially open the valve to a metered flow.
b.
If an indicating switch option was installed, verify that the output signal changed states.
3. When a valve is in the closed position, the inlet ports are isolated from the outlet ports. When
a valve is in the open position, all ports are common.
Please contact the factory or your local representative to answer questions or for further
information.
Manual 15000005 Rev 7
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