INSTALLATION, OPERATION, &
MAINTENANCE MANUAL
TITLE: F7000 / 8000 Series Rev. T
Pilot-Operated Safety Relief Valve Page 20 of 43
4.4 F300 PILOT VALVE, PISTON-STYLE (501 to 6000 psig)
(See Illustrations below and on
Page 21)
A. F300 (Piston-style) Disassembly
CAUTION: It is extremely dangerous to attempt to disassemble any valve while it remains in
service with incoming line pressure.
1) Remove the pilot valve from the main valve, or safely block the incoming pressure before
disassembling the valve and performing maintenance.
2) Unscrew the pressure adjustment (PA) screw cap from the PA screw. Loosen the lock nut.
3) Loosen, but do not remove the PA screw from the bonnet.
4) Further disassembly can proceed in the reverse order from the assembly instructions on Page 22.
5) Replacement soft goods are listed in Section 8.0 of this manual.
(See full assembly on Page 21)
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