Installation, Operation and Maintenance Manual
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H-V063-E-9
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Self Control Valves (Pressure Reducing Type / Pressure Relief Type / Pressure Retaining Type)
13
9. Adjustment procedure for working pressure
- Tighten the lock nut securely. (Too weak a tightening torque on a lock nut may cause it to
loosen.)
- When the adjusting screw keeps being turned counterclockwise, it comes off. Therefore, handle
it within a range that it will not come off.
● Spanner wrench
● Allen wrench
Procedure
1) Detach the cap [l] from the top of the valve.
2) Loosen the lock nut [i] counterclockwise with a spanner wrench.
3) Turn the adjusting screw [j] with an Allen wrench.
Clock wise:
The working pressure is increased.
Counterclockwise: The working pressure is decreased.
4) Set the adjusting screw [j] with an Allen wrench, and use spanner wrench to tighten the lock nut [i].
5) Re-attach the cap [l].
When the cap [l] touches the O-ring (D) [7], turn the cap [l] about 45
˚
to closing degree.
Necessary items
Caution
