11.
Repair of valves which show leaks in backpressure
testing may be attempted by tightening the joint
involved to normal tightness, while the valve is in
the testing area. The valve is to be examined for
cause of failure, the cause corrected, and the test
repeated.
E. Conversions between
Conventional and Bellows Type
Table 17 shows the requirements to convert
between Conventional configurations and a Bellows
configurations.
Table 17: Conventional to Bellows Conversion
Valve
New Parts To Convert From
Orifice
Size
Conventional to
Bellows Valve
Bellows to
Conventional
Valve
ALL
Ori-
fices
1
Bellows Assembly
Standard Material,
AISI 316L Stain-
less Steel
1
Set of gaskets
for conven-
tional valve
2 Set of gaskets for
bellows valve
2 Pipe Plug
3 Disc holder for
bellows valve
4 Cover Plate
1
1. Conventional Cover Plate may be modified to work
on a bellows valve.
XX. Setting and Testing (Cont.)
80 |
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