Installation, Operation and Maintenance Manual
Butterfly Valves Type 75, 75D Pneumatic Actuated Type TW 18
Adjustment of opening / closing speed procedure
- Fasten a lock nut after adjusting a speed controller of solenoid valve.
Double action type
Spanner wrench
Procedure
1) Release the adjustment knob of the solenoid valve by
turning the locking nut left.
2) Turn right the adjustment knob of the solenoid valve fully.
* Avoid excessive tightening.
(The speed controller can be damaged.)
3) Supply the air to the solenoid valve.
4) Apply regular rated voltage to solenoid valve, and turn the
open side adjustment knob of the speed controller left little
by little.
5) Turn off the solenoid valve, and turn left the close side
adjustment knob little by little.
6) Repeat item 4), 5) to adjust the opening / closing speed
required.
7) When the adjustment is finished, fix the adjustment knob
by turning locking nuts right.
* Avoid excessive tightening.
(The speed controller can be damaged.)
Necessary items
Caution
For Double action type with solenoid valve
Close Side
Speed Down
Speed Up
Open Side
Speed Up
Speed down
For Double action type with speed controller
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