• DN40 P3W Relief Valve P3W40A4207

DN40 P3W Relief Valve P3W40A4207

  • Product Code: P3W40A4207

The P3W Pressure & Temperature valve provides protection against both excess temperature as well as over pressurisation.  The valve will automatically discharge hot water at a predetermined set pressure and/or temperature.  Each of the lift mechanisms will work independently of each other.  The valve is designed to be used on hot water boiler applications.


  • Size Range: 1/2" (DN15) to 2 1/2" (DN65)
  • Set Pressure Range: 0.4 to 12.5 bar
  • Set Temperature: 90 - 95°C
  • BSP taper male inlet connection
  • BSP parallel outlet connection
  • WRAS approved PTFE valve seal and silicone diaphragm
  • Sealed Lever 
  • WRAS Approved (all sizes and pressures) - Certificate number 2011005
  • Designed in accordance with BS EN 1490 (Building valves. Combined temperatures and pressure relief Valves.  Tests and requirements)
  • Valves achieve maximum lift on both temperature and pressure relief scenarios, as required by BS EN 1490
  • Valves supplied pre-set at the required set pressure and Temperature
  • Test Certificate supplied Free of Charge

Min Pressure 0.4 bar g. (5.8 psi g.)
Max Pressure 12.5 bar g. (181.25 psi g.)
Temperature Range 90°C to 95°C
Flow Area 803.84 mm² (32mm inlet bore diameter)
Nominal Power Rating 100kW at 1 Bar in accordance with BS 1490
Actual Power Rating 224kW at 1 Bar in accordance with BS EN4126-1
Inlet Connection 1 1/2" BSP male
Outlet Connection 1 1/2" BSP female
Flow Rate Refer to Flow Tables
Materials Bronze
Seal Material PTFE
Test Certifications Supplied free of charge
Approval WRAS Approved (all sizes and pressures). Designed in accordance with BS EN 1490 (Building valves. Combined temperature and pressure relief valves. Tests and requirements).

Tags: DN40 relief valve, P3W relief valve, P3W40A4207, pressure safety device, industrial valves