Flowgrid Slam Shut | 17
Diaphragm Disassembly and Assembly
1. Remove and the diaphragm assembly.
2. Remove the nut, diaphragm plate and diaphragm.
3
Install a new diaphragm with the convolutions toward the
diaphragm plate.
4. Install the nut and torque to 5 to 6 ft-lbs. Over tightening
the nut will distort the diaphragm.
Over and Under Pressure Valve Cartridge Disassembly
Refer to Figure 14 and 15 for this operation.
Body
O-Ring
Ring
Seat Seal
Retainer
Guide
Poppet
Assembly
Diaphragm
Nut
Diaphragm
Plate
Figure 14 – Over Pressure Assembly and Disassembly
Working on this assembly, except in a clean environ-
ment may result in internal leakage. Any dirt or debris
on or that migrates onto the valve seat or poppet may
cause permanent damage to the seat and will cause the
valve to leak.
1. Remove the cartridge from the controller housing.
2. Disassemble the cartridge. Remove and discard the seat
and body o-ring.
3. Install a body o-ring and seat seal from the rebuild kit.
4. Reassemble the cartridge and torque to 120 inch pounds.
WARNING
Nut
Diaphragm
Plate
Diaphragm
Diaphragm
Retainer Bolt
Guide
Pin
Retainer
Seat Seal
Poppet
Assembly
O-Ring
Ring
Figure 15 – Under Pressure Assembly and Disassembly
