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GFH45-IOM Rev. 0  12/18  Printed in USA 

 

 

INSTALLATION 
 

CAUTION:

  The regulator must be installed with the 

draincock downward to allow accumulated fluid to 
drain out when the draincock is opened. 

 

CAUTION:

   Moisture and particulates can be 

discharged at high speed when draincock is 
opened.  

 
The GFH45 can be line mounted, panel mounted, or wall 
mounted (reference G6018006 wall-mount bracket).   
 
Teflon tape is the preferred thread sealant for the 1/4” 
NPT connections. 
 
Connect the supply to the port marked “IN”.  The other 
ports are outlet and factory plugged outlet gauge ports. 
 

 

 
 
WARNING

:  If the supply line is connected to the outlet 

port, regulator damage or unexpected flow through the 
regulator could occur. 

 
Prior to applying inlet pressure, double check the 
connections and assure the wrench knob or hand wheel 
is backed out sufficiently to unload the range spring in 
the bonnet. 
 
Carefully apply inlet pressure and check the supply 
connection for leakage.  Adjust the output pressure by 
rotating the wrench knob or hand wheel clockwise and 
check the outlet connection for leakage. 
 

WARNING:

 The handwheel or wrench knob can vibrate 

loose and fall out if the jam nut is not tightened. 

 

            

 

 
Figure 1 – Regulator dimensions with 1/4” NPT connections.  For certified dimensional drawing, see A17-83.

 

Summary of Contents for GFH45

Page 1: ...STRUCTION Nozzle Assembly Brass with Buna N Soft Seat Range Spring Zinc Plated Carbon Steel Diaphragm Assembly see CED Code Bowl Brass Body Brass Bonnet Brass SPECIFICATIONS Maximum Supply Pressure 300 psig 2 07 MPa Outlet pressure ranges are determined by the last character in the regulator model number C 25 psig 172 kPa F 60 psig 414 kPa G 125 psig 862 kPa Proof Pressure 150 of maximum operating...

Page 2: ... factory plugged outlet gauge ports WARNING If the supply line is connected to the outlet port regulator damage or unexpected flow through the regulator could occur Prior to applying inlet pressure double check the connections and assure the wrench knob or hand wheel is backed out sufficiently to unload the range spring in the bonnet Carefully apply inlet pressure and check the supply connection f...

Page 3: ...leed No Relief Character 10 Gauge Selections X No Gauge standard Character 11 Filter Bowl Option 1 Standard Bowl Size NOTE Materials of construction and cleaning specifications are the user s responsibility Character 12 Control Ranges C 25 psig 172 kPa F 60 psig 414 kPa G 125 psig 862 kPa OPERATION IN SERVICE Open upstream controls to provide the regulator supply pressure To increase the output se...

Page 4: ...kage Repair Disassemble Inspect regulator body where bowl o ring contacts Inspect bowl where o ring contacts Replace o ring Symptom External leakage Potential Cause Draincock leakage Repair Tighten draincock by turning handle clockwise Symptom Outlet pressure cannot be adjusted to maximum control range Potential Causes 1 Control knob positive stop adjustment 2 Flow induced droop Repair 1 Adjust po...

Page 5: ...r 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 m...

Page 6: ...or Model Number and Item Description This will permit positive identification and rapid handling of order 2 Spare parts kit standard configuration only a G6385516 for the 0 25 60 psi 172 414 kPa models b G6385517 for the 0 125 psi 862 kPa model 3 For other model configurations or non CED codeable models consult factory for correct part number ...

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