A. Removal of Pilot Valve from
Main Valve
1. Make sure there is no media pressure in the
vessel, in the valve inlet, in the main valve, or in
the pilot valve.
2. Disconnect the Sensing Tube, Dome Tube and
Discharge Line from the Pilot Valve.
3. All other external attachments should be
removed to free the Pilot Valve for Disassembly.
4.
Loosen and remove the two cap bolts holding
the pilot valve to the mounting bracket.
5. Place parts in the order they are disassembled
to facilitate reassembly.
B. Disassembly of Main Valve
Note: If the pilot valve has not been removed,
then refer to Section XIII.A.
1. If applicable, remove sensing tube fitting from
Sensing Tube
2. Remove and discard Plug Filter from Sensing
Tube (if applicable).
3. Loosen and remove the Stud Nuts on the Cover
Plate.
4. Remove the Bracket.
5. Install 1/4” MNPT pipe plug into Cover Plate
where dome line is installed. Pipe plug will
prevent Main Valve Piston from falling out of
Cover Plate when the assembly is removed.
6. Remove Cover Plate and Main Valve Piston
assembly from Base.
ATTENTION!
If Main Valve Piston O-Ring or Spring Energize
Seal is damaged, then Main Valve Piston may
fall out of Cover Plate during disassembly.
7. Remove pipe plug from Cover Plate.
8. Remove the Main Valve Piston from the Cover
Plate using a dowel pressed through the center
hole in the top of the Cover Plate.
XIII. Disassembly of the 2900 POSRV
Wear necessary
protective
equipment to
prevent possible
injury
Lower pressure
and stand clear of
discharge when
working on valve to
avoid severe personal
injury or death.
Do not remove bolts
if pressure in line,
as this will result
in severe personal
injury or death
Know all valve
exhaust/leakage
points to avoid
possible severe
personal injury or
death
Consolidated 2900 Series Generation II POSRV Instruction Manual
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