<Packed valve handling precautions>
Fig. 10-4-
8
•
Open the valve stem all the way out, but do not try
to open it beyond the stopper.
Cap
Torque
Pipe size of Packed Valve
Size of Hexagon wrench
12.70 mm and smallers
A = 4 mm
15.88 mm
A = 5 mm
•
Securely tighten the valve cap with torque in the
following table
Cap Size (H)
Valve Rod
Cap
Service
Port Cap
H17 - H19
H22 - H30
H14
H17
14~18 N.m
(1.4 to 1.8 kgf·m)
33~42 N.m
(3.3 to 4.2 kgf·m)
8~12 N.m
(0.8 to 1.2 kgf·m)
14~18 N.m
(1.4 to 1.8 kgf·m)
A
H
Hexagon wrench
is required.
Service Port Cap
Valve Rod Cap
CAUTION
Fig. 10-4-
7
Packed valve at liquid side
Packed valve at gas side
Service port (Valve core (Setting pin))
Vacuum
pump
Vacuum pump adapter for
counter-f ow prevention
Charge hose
Handle Hi
(Keep full closed)
Manifold valve
Pressure gauge
Compound pressure gauge
Handle Lo
Charge hose
Connecting pipe
–101 kPa
(–76 cmHg)
•
KEEP IMPORTANT 6 POINTS FOR PIPING WORK.
(1) Take away dust and moisture (inside of the
connecting pipes).
(2) Tighten the connections (between pipes and unit).
(3) Evacuate the air in the connecting pipes using
a VACUUM PUMP.
(4) Check gas leak (connected points).
(5) Be sure to fully open the packed valves
before operation.
(6) Reusable mechanical connectors and f ared joints
are not allowed indoors. When mechanical connectors
are reused indoors, sealing parts shall be renewed.
When f ared joints are reused indoors, the f are part shall be
refabricated.
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