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GFH20-IOM  05/16  

                                      

 

          WARNING - TECHNICAL DATA SUBJECT TO EAR CONTROLS 

THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE EXPORT ADMINISTRATION ACT OF 1979, AS AMENDED 

(TITLE 50, U.S.C., APP. 2401, ET SEQ.) VIOLATION OF THIS EXPORT CONTROL LAW IS SUBJECT TO SEVERE CRIMINAL PENALTIES. 

 

 

STORAGE 

 
Store per ANSI-ASME N45.2.2 Level B 
 
 

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.  

 
Teflon tape is the preferred thread sealant for the 1/4” 
NPT connections. 

 

WARNING

:  If the supply line is connected to the “OUT” 

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 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 clockwise and check the outlet 
connection for leakage. 
 

WARNING:

 The 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, Refer to A17-60 

 

 
OPERATION IN SERVICE 
 

Open upstream controls to provide the regulator supply 
pressure.  To increase the output set pressure, rotate the 
knob clockwise.  To decrease the output set pressure, rotate 
the knob counterclockwise.  
 
 

 
When the system is being shut down, it is an established  
safety practice to reduce the output pressure completely, 
then shut off the supply pressure to the regulator. 
 
This will assure that no output pressure will be generated 
when the supply pressure to the regulator resumes, the next 
time the system is used. 
 

FILTER AREA: 5 IN² (32 cm²) 
 
DRIPWELL CAPACITY: 5 IN³ (82 cm³) 
 
WEIGHT: 3.12 lbs. (1.41 kg) 

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