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This valve is designed to relieve the system of higher than normal pressures.  It is normally set at 15-20% above the normal operating pressure.  Once the pressure falls below the set point, it will automatically re-set.  It will operate in this manner multiple times.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to

Specification US Metric
Rated Pressure1813 PSI
Pressure2030 PSI
Flow5.3 GPM
Rated Pressure1813 PSI
Permissible Pressure2030 PSI
Continuous Temperature194 °F
Inlet1/4" BSP
Bypasss1/4" BSP
Weight7.6 lbs
Valve Housing316 Stainless Steel
O-ringsViton 70
Backup RingsTeflon
Ball 7/32Ceramic
Ball 1/4420 Stainless Steel
Seat316 Stainless Steel
Piston316 Stainless Steel
Spring Guide303 Stainless Steel
Spring302 Stainless Steel
LocknutNickel Plated Brass

No repair kits available.  To replace this item please contact Giant Customer Service.


Documents open in new window/tab.

  • Giant Industries Limited Warranty
  • 22107-51 Literature


  • Body: 316 Stainless Steel
  • Elastomers: Viton

Sample Pump

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