Installation, Operation and Maintenance Manual
󲷇H-A069-E󲷈 Ball Valve Type2121α Pneumatic Actuated Type AR 15-50mm (1/2”-2”) 29
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Assembly
Procedure
1) Assemble it in the reverse order to the procedure of "Disassembly" from Step 15.
* When attaching a seat, confirm the front and rear sides of the seat.
When attaching the actuator to the valve, confirm that the direction of the opening display of the
actuator and the direction of the stem are correct. Then push the actuator into the top flange of
the valve to attach.
* Dent side = Contact with the ball
22. Inspection items
- Perform periodic maintenance. (Leakage may develop due to temperature changes or over
periods of prolonged storage, rest or operation.)
Portion to be inspected Inspection item
Actuator
- Existence of rust and corrosion on the appearance.
- Tightening condition of respective threaded portions. (Loose or not)
- Existence of abnormality in opening and closing operating sounds.
- Smooth opening and closing operation
* Even if the valve is operated less frequently, confirm that it opens and
closes smoothly at least once per 30 days.
* It is unnecessary to supply oil to this actuator.
Base plate - Mating condition of the base plate.(Loose or not)
Valve
- Existence of scratches, cracks, deformation, and discoloring.
- Existence of leakage from the valve to the outside.
- Existence of leakage when the fully closed.
T
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pe 21α
Ball side Carrie
r
side
T
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pe 21
Ball side Carrie
r
side
Ca󲘢󲘡i󲘜󲘛
Ball
Seat Seat
Ball
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