Installation, Operation and Maintenance Manual
󲷇H-A003-E-15󲷈 Ball Valve Type 2121α Pneumatic Actuated Type AA 27
(19) Method of adjusting face pressure between ball and seat
- Wear protective gloves and safety goggles as fluid remain in the valve even if the pipeline is empty.
(You may be injured.)
- Take care not to over-tighten the Union Nut. (The valve can be damaged.)
- Do not use the pipe wrench. (The valve can be damaged.)
Strap wrench Allen wrench
Handle (For manual operating Option:[14]) Safety goggles
Protective gloves
Procedure
1) Completely discharge fluid from pipes.
2) Shut the main air valve, and open the bypass valve to discharge
air from the actuator.
3) Turn off the power source of solenoid valve. (In the case of solenoid valve
mounted.)
4) Loosen the two unions nuts [5] at night and left with an strap wrench.
5) Remove the body part from piping system.
6) Loosen bolt (B) [27] with a spanner wrench, and remove the body part.
* Memorize both opening degree of boll [2] and actuator [23].
7) Operate the valve to full close.
* Except for spring single action type.
8) Engage the upper convex part of the handle with the concave part
of the union.
9) Make an adjustment by turning the union clockwise or counter clockwise.
-Tighten the union
Ball valve type 21: Clockwise
Ball valve type 21α: Counter clockwise
-Loosen the union
Ball valve type 21: Counter clockwise
Ball valve type 21α: Clockwise
10) Assemble the valve by following the above procedure in the reverse order,
starting at 6).
Necessary items
Ball valve type 21
Tighten
Loosen
Tighten
Loosen
Ball valve type 21
Caution
W
arning
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