Installation, Operation and Maintenance Manual
Butterfly Valve Type 55Type 55IS Pneumatic Actuated Type TA
24
(18) Stopper adjustment procedure
- Don’t supply air during manual operation.
(When air is supplied during the manual operation, you may be injured.)
Spanner wrench
Procedure
1󲼆 Stop the air supply, and open the bypass valve to exhaust the
air in actuator.
2󲼆 Attach the spanner or the hexagon wrench to stopper, and
loosen the rocking nut with the spanner slowly.
Don’t damage the seal washer.
(Otherwise, the air may leak.)
3󲼆 Turn the stopper with the spanner or the hexagon wrench to
adjusting direction.
Direction
Clock wise
Counter
clock wise
Open side
Smaller
Larger
Close side
Larger
Smaller
Avoid excessive tightening.
(Otherwise, the air may leak.)
4󲼆 Close the bypass valve, and supply the air to the actuator.
Operate the valve with air to make sure that opening degree
is adjusted correctly. If not, repeat the item 1)-4).
Necessary items
Double action type
Single action type
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