ITT
Engineered Valves, LLC
Page 21 of 22
Technical Manual No. IOT1000P
Effective 8/31/2018
REV LEVEL B
B.
GO Switches
1.
Ensure the valve is in the closed position.
2.
Wire the switch to a test device.
3.
Loosen switch and push it towards the end flange (up - orientation
assumes the valve actuator is on top) to top of slot of POC box. This will
typically move the switch past the target device.
4.
Move the switch away from the end flange (down) until it trips. Try and
keep the switch level. Continue to slide the switch for additional 1/32”.
Tighten switch to POC box and ensuring the distance between the end of
switch and target is per manufacturer’s recommendations.
5.
Plug the atomizing inlet and outlet pipes.
6.
With the oil valve fully closed, pressurize the oil inlet to 10 to 20 PSIG
(68.9 - 137.9 KPa). While monitoring the outlet for leakage, slowly open
the valve. The normally open contacts of the switch should change state
before flow commences (> 24 in
3
/Hr or 400 cc/Hr). If it does not, loosen
the screws, securing the switch and move the switch downward 0.015"
(0.4 mm). Tighten retaining screws and repeat test.
7.
Pressurize the oil valve inlet between 10 and 20 PSIG (68.9 - 137.9 KPa)
while monitoring the outlet for leakage. Stroke the valve to open position.
Slowly close the valve while monitoring the normally open switch
contacts. Flow should cease (< 24 in
3
/Hr or 400 cc/Hr) before contacts
change state. If it does not, loosen the screws, securing the switch and
move the switch upward 0.015" (0.4 mm). Tighten retaining screws and
repeat test. If any adjustments are made during this step, step 6 must be
repeated.
8.
Switches are properly set when both conditions in Step 6 and 7 are
satisfied.
