ITT
Engineered Valves, LLC
Page 20 of 22
Technical Manual No. IOT1000P Effective 8/31/2018
REV LEVEL B
assumes the valve actuator is on top) to edge of slot or until switch boot
hits the edge of the hole. This will typically move the switch roller
actuator past the tripping device.
4.
Move the switch away from the end flange (down) until it trips. Try and
keep the switch level.
5.
Mark the limit switch box 0.14" (3.6 mm) from the switch surface
opposite the end flange (bottom surface), for the entire length of the
switch. This can be accomplished by placing a 0.14" (3.6 mm) thick metal
plate on the switch and marking along the edge. Caution with how close
the mark is to the plate. If the marking device is always 0.03" (0.8 mm)
higher, the plate should then be 0.11" (2.8 mm), so the end result is always
0.14" (3.6 mm).
6.
Move switch to the line and tighten the two screws to prevent movement.
7.
Plug the atomizing inlet and outlet pipes.
8.
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.
9.
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 8 must be
repeated.
10.
Switches are properly set when both conditions in Step 8 and 9 are
satisfied.
