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COMPONENT MAINTENANCE MANUAL
(7)
If the thermoswitch fails to meet any of the above criteria, replace the
temperature sensor assembly (22) with factory new.
L.
Vent Valve Pressure Test
Check the operation of the vent valve assemblies as follows:
(1)
Prepare a fixture from stainless steel tubing with an end adapter threaded on
the inside to match the vent valve threads (M8 x 1.00). The adapter can be
made from 1/2 inch round stock with 1/4 inch I.D. hole.
(2)
Screw the valve (3) with its o-ring (4) into the adapter end of the pressure test
fixture.
(3)
Attach the fixture to a compressed air line through an adjustable pressure
reducing valve limited to 20 psi (1.4 bar).
(4)
Immerse the valve and end of fixture in water, and slowly raise the pressure.
Make sure the valve opens between 2 psi and 10 psi (0.14 to 0.7 bar).
(5)
Reuse only those vent valves that open in the 2 psi to 10 psi (0.14 to 0.7 bar)
range. Re-soak those valves that do not open at 10 psi. Discard valves that are
not gas tight at low pressure.
SAFT AMERICA INC.
4579
24-31-05
PAGE 113
Jan 30/98
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