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GFH45-IOM Rev. 0 12/18 Printed in USA
FIGURE 2 – Cross Section of GFH45 Regulator
REPAIR AND MAINTENANCE
WARNING
:
To prevent equipment damage or injury, insure
that all system pressure is relieved and the supply valve for this
regulator is secured in the off position.
Cleanliness is critical to successful maintenance and repair of
this product. Perform all repair work in a clean environment, with
clean tools, and the correct materials and supplies.
Tools and Materials Required:
1. A vise, or other suitable fixture, to secure the regulator.
2. Phillips screwdriver
3. Socket
wrenches
4. Torque
Wrench
5. Lint free swabs or wipes to clean components
DISASSEMBLY
1. Secure the body of the regulator.
2. Turn control knob counterclockwise until the range
spring is unloaded.
3. Remove the six screws holding the bonnet to the body.
4. Remove the bonnet.
5. Remove the spring button and spring.
6. For 125 psi output units, remove the restricting plate
(note: the 0-60 psi model is shown in figure 2 and does
not have this restricting plate).
7. Remove the diaphragm assembly.
8. Unscrew the bolt and seal washer.
9. Remove the dripwell by pulling downward away from the
body.
10. Remove the filter.
11. To remove the plug spring and valve plug, unscrew the
retainer, then grip the plug spring and pull downward
away from the body. The plug and plug spring should
slide out of the body together.
ASSEMBLY
1. Replace worn or damaged components with new
components.
2. Clean and inspect components for reuse. Sealing
surfaces must be smooth and free of wear or scratches.
3. Install the valve plug and plug spring into the body.
Secure with the retainer. Torque retainer to 80 in-lb.
4. Replace the o-ring around the bowl with a new
lubricated o-ring.
5. If previously removed, install a new seal washer onto
the bolt. Install the filter plate, grommet and spring into
the dripwell, on the bolt.
6. Place a new filter in the body.
7. Install the dripwell by firmly pressing it over the o-ring.
The dripwell may be rotated to align the draincock to the
desired orientation. Secure the dripwell with the bolt,
tightened to 80 in-lb.
8. Assemble the diaphragm assembly, the restrictor plate
(for 125 psi models only), range spring, spring button
and bonnet. Secure bonnet with the six (6) bonnet
screws. Tighten snug (32 in-lb).
9. Lubricate (grease) and install the adjustment (wrench
knob or handwheel), jam nut and any panel nuts and/or
mounting hardware.
