APTech AP 4625 - Manual (Page 2)

APTech Miscellaneous Instructions
#123625C0
AP3625, Panel Mount
Revision 4
February 5, 2013
Page 2 of 2 123625C0.doc
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4. Tighten the two setscrews (#2) to 50 in·lbf (5.6 Nm) using a 1/8 inch hex bit.
5. For standard or “BB” handles only, tighten the pointer (#1) using a 1/8 inch hex key.
6. Verify that the indicator plate did not move out of position by rotating it counter-clockwise
until it stops. Holding the indicator plate down, tighten both setscrews (#4) to 20 in·lbf (2.3
Nm) using a 5/64 inch hex bit.
E. Valve Testing
1. Open and close the valve several times to verify the actuator operates correctly. The valve
actuator should have no excessive friction. Leave the valve in the closed position.
2. Connect the valve inlet to 60-100 psig (4.1 - 6.9 bar) pressure nitrogen source line. Pressurize
the valve inlet. Verify there is no audible leakage across-the-seat. Open the valve and verify
there is no flow restriction in the valve. Close the valve.
3. Perform a helium leak test to verify that the valve does not leak across-the-seat. Leak test
procedures depend greatly on equipment and operator preference. Refer to SEMI F1 for
typical leak testing protocols. If it is not possible to perform a helium leak test, then a
pressure decay test could be performed using inert gas.
Figure 1. AP3625 Valve Assembly Diagram.
Revised By: Roman Sheykhet
Engineering Approval By:
Date: 02/05/13 EAR # 5527