21
.10
5.4 Main valve function check
CAUTION
This test must be performed at a slow rate of
pressure increase to ensure that the main valve
does not go into full lift. The pressure applied to
the inlet is not to exceed 105% of nameplate set
pressure.
After completing the high pressure leakage
check of paragraph 5.3, verify main valve
opening as follows. Remove the leakage test
device from the outlet flange. Slowly increase
the inlet pressure above 90% of set pressure.
Continue increasing inlet pressure until an
audible discharge at the valve outlet verifies
main valve opening.
Ported blind flange
Supply pressure gauge
Supply
¼” O.D. X .028 wall tube
¼” I.D. flexible elastomer
or rubber tubing
FIGURE 10 - TEST SET-UP FOR VALVE WITH STANDARD PILOT
ANDERSON GREENWOOD SERIES 400 PISTON PILOT POPRV
InstallatIon and MaIntenance InstructIons
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