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174A-040 3/4 Watts

Part of the 174A Series

Ordering Code: 0274479

UPC: 098268013078

Lead Free Model Available

3/4 In Bronze Boiler Pressure Relief Valve, 40 Psi, Threaded Female Connections

This 3/4 inch boiler pressure relief valve is used in hot water heating and domestic supply boiler applications to protect against excessive pressures on all types of hot water heating supply boiler equipment. It consists of a bronze body construction with NPT threaded female inlet and NPT threaded female outlet (drain) connections, non-metallic disc-to-metal seating, stainless steel spring, and test lever. It resists corrosive water conditions, 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 40 PSI (275.8 kPa) with corresponding high pressure ratings up to 800,000 BTU/hr.800,000 BTU/hr.

Product Features

  • Spring loaded
  • Non mechanical seat-to-disc alignment will not stick or freeze
  • Bronze body
  • Automatic reseating
Specifications
Body Material Bronze
BrandName Watts
GPM-When Relieved Does Not Apply to Product
Inlet Connection Size 3/4 IN
Inlet Connection Type Female Threaded
Inlet Thread Type NPT
LeadFree NO
Maximum Temperature-Fahrenheit 250
Maximum Working Pressure-PSI 30
ModelNumber 174A-040 3/4
Outlet Connection Size 3/4 IN
Outlet Connection Type Female Threaded
Outlet Thread Type NPT
Part Number 0274479
Pressure Range 30 to 150 PSI
Pressure Relief Setting-PSI 40
Pressure Steam Discharge Capacity 800000 BTU/HR
Protection Type Pressure
Series 174A
Shank Length Does Not Apply to Product
Temperature Steam Discharge Capacity Does Not Apply to Product
Thermostat Material Does Not Apply To Product
Thermostat Probe Length Does Not Apply to Product