ASAHI AV VALVES Installation,Operation and Maintenance Manual
Diaphragm Valves Type 14 True Union Diaphragm Valves Type14
6
Threaded type
(Material : PVC, C-PVC, PP, PVDF)
●
Sealing tape
（
A non-sealing tape can cause leakage.
）
●
Strap wrench
（
Do not use Pipe wrench.
）
●
Spanner wrench
Procedure
1)
Wind a sealing tape around the external thread of joint, leaving the end (about 3mm) free.
2)
Loosen the union nut
◯
26
with a strap wrench..
3)
Remove the union nut
◯
26
and the end connector
25b
.
4)
Lead the union nut
◯
26
through the pipe.
5)
Tighten the external thread of the joint and the end connector
25b
hardly with hand.
6)
Using a spanner wrench, screw in the end connector
25b
by turning 180
°
- 360
°
carefully without damaging it.
7)
Make sure that the O-ring (C)
◯
27
is mounted.
8)
Set the end connector
25b
and union nut
◯
26
directly on the body without allowing the O-ring (C)
◯
27
to
come off.
9)
Tighten union nut
◯
26
on each valve until hand tight.
10)
Using a strap wrench tighten union nuts uniformly on each side approx 90
°
- 180
°
turns, 1/4 to 1/2 turns.
Necessary items
Make sure that the threaded connections are plastic x plastic.
（
Metallic thread can destroy the body cap
）
Avoid excessive tightening. (The valve can be damaged.)
Avoid excessive tightening.
（
The valve can be damaged.
）
Caution
Caution
Caution
