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Part of the 740 Series

Ordering Code: 0382969

UPC: 098268019186

Lead Free: Not In Scope

1 In Iron Boiler Pressure Relief Valve, 70 psi, Expanded Outlets

This 1 inch boiler pressure relief valve is used in hot water space heating boiler applications to protect against excessive pressure on all types of hot water space heating boiler equipment. It consists of an iron body construction with expanded outlet drain connections for hot water space heating boilers, non-metallic disc-to-metal seating, stainless steel spring, and test lever. Series 740 offers large discharge capacity, resists corrosive water conditions, resists sticking and freezing, and prevents water and sediment from being trapped in the seat. It is designed for emergency safety relief, not as an operating control. The pressure relief is set at 70 psi ( 482.6 kPa) with corresponding high pressure ratings up to 2,499,000 BTU/hr.

Product Features

  • Water can not be trapped and sediment can not foul seat
  • Iron body with expanded outlets for hot water space heating boilers
  • Water seal of high temperature resisting material isolates spring working parts from water during relief
  • Non-mechanical seat-to-disc alignment will not stick or freeze
Body Material Iron
Brand Name Watts
Inlet Connection Size 1 IN
Inlet Connection Type Female Threaded
Inlet Thread Type NPT
Lead Free Not In Scope
Maximum Temperature-Fahrenheit 250
Maximum Working Pressure-PSI 53
Model Number 740-070
Outlet Connection Size 1 1/4 IN
Outlet Connection Type Female Threaded
Outlet Thread Type NPT
Part Number 0382969
Pressure Range 30 to 75 PSI
Pressure Relief Setting-PSI 70
Pressure Steam Discharge Capacity 2499000 BTU per hour at 70 PSI
Protection Type Pressure
Series 740