Installation, Operation and Maintenance Manual
󲷇H-A058-E-12󲷈 Diaphragm Valve, True Union Diaphragm Valve (15-50mm, 1/2”-2”) Pneumatic Actuated Type AI
22
(15) Adjustment procedure for stopper
- Do not touch the actuator when it operated.
- If a stopper is loose, adjust it.
- Tighten the stoppers securely. (Too weak a torque on a stopper may cause it to loosen.)
<Adjustment Procedure for Stopper>
Spanner wrench Stopper adjustment tool (Option)
Driver Protective Gloves Goggles
Procedure
1) Remove the gauge cover [11] with a flat head screw.
* Do not damage O ring (A) [14].
2) Fully open the valve by controlling volume of air.
3) Fix stopper [51] with spanner wrench (Stopper adjustment tool) and use spanner wrench to
loosen nut [52].
4) Remove stopper [51] and nut [52].
5) Fully close valve by controlling the volume of air.
6) Attach stopper [51] by hand and tightens until not turning round the stopper [51] with the hand.
7) Turn stopper [51] with spanner wrench (Stopper adjustment tool) until the position in which
fluid begins to leak.
8) Turn stopper [51] with spanner wrench (Stopper adjustment tool) 1/4 1/2 turns,
counterclockwise.
9) Fix stopper [51] with spanner wrench (Stopper adjustment tool) and use spanner wrench to tighten nut [52].
* Insufficient tightening may loosen the stopper.
10) Completely close valve by controlling the volume of air and check for leakage.
* If there is leakage, repeat steps 2) to 9) until leakage stops.
11) Install gauge cover [11].
Necessary items
Stopper adjustment
tool (Option)
Caution
Warning
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