Installation, Operation and Maintenance Manual
H-A003-E-15 Ball Valve Type 21・21α Pneumatic Actuated Type AA 14
(Material : PP, PVDF )
● Strap wrench
● Sleeve welder or automatic welding machine
● User’s manual for sleeve welder or automatic welding machine
1) Loosen the union nut  with a strap wrench.
2) Remove the union nut  and the end connector [4c].
3) Lead the union nut  through the pipe.
4) For the next step, refer to the user’s manual for the sleeve welder or the automatic welding machine.
5) After welding, make sure that the O-ring (A)  is mounted.
6) Set the end connector [4c] and the union nut  directly without allowing the O-ring (A)  to come off.
7) Tighten union nuts  on each valve until hand tight.
8) Using a strap wrench tighten union nuts uniformly on each side approx 90°-180°turns, 1/4 to 1/2 turn.