INSTALLATION, OPERATION, &
MAINTENANCE MANUAL
TITLE: F7000 / 8000 Series Rev. V
Pilot-Operated Safety Relief Valve Page 31 of 41
5.7 PILOT AUXILIARY SETTER ADJUSTMENT (See Illustration below)
1) The set pressure for the pilot auxiliary setter may be adjusted by turning the pressure adjusting
(PA) screw or changing springs. Contact Flow Safe to verify the proper spring for the desired set
pressure.
2) The auxiliary setter must be installed on its designated pilot valve when being adjusted. This may
be verified by means of matching serial numbers. The set pressure will be the pilot set pressure
plus the auxiliary setter differential pressure.
3) Attach pilot valve assembly, with auxiliary setter, to the test tank.
4) The auxiliary setter cap and adapter cap should be removed and the pressure adjustment screw
turned out to below where the set point is thought to be.
5) Slowly increase inlet pressure to set point, which occurs when dome pressure decreases to the
percentage of inlet pressure listed in 5.2.1 (Page 26) for the particular valve size.
6) Adjust the PA screw as necessary to cause dome pressure to drop to the specified value at the
required set pressure. If further adjustments fail to achieve the required dome reduction, stop the
test, disassemble the auxiliary setter, and inspect parts as required.
7) When the total set pressure (i.e. original pilot set pressure plus the auxiliary setter differential
pressure) has been adjusted to the desired setting, tighten the PA screw lock nut.
8) Install and tighten the adapter cap onto the bonnet and then install and tighten the cap onto the
adapter cap.
9) Repeat the test to verify repeatable performance.
PILOT AUXILIARY SETTER ARRANGEMENT
F100 PILOT SHOWN w/ SINGLE AUX SETTER
CAP
ADAPTER CAP
PRESSURE
ADJUSTMENT
(PA) SCREW
BONNET
PILOT
PA SCREW
SPRING
ROD
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