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Watts STS Thermal Safety Valve

Watts STS Thermal Safety Valve

£69.49 inc. VAT

  • Thermal relief valve for non-atomized, solid fuel boilers with double safety
  • Includes two heat sensitive elements
  • This means if one fails, the other will still operate
  • 1300mm length capillary
  • 145mm immersion probe with 1/2″ male connection
  • Nickel plated brass body
  • Stainless steel spring
  • Manual discharge button

The use of thermal relief valves is obligatory in all open tank systems using solid, non-pulverised fuel fired boilers. The heat sensitive element, immersed in the boiler water, expands as temperature increases thus causing the valve plug to open when the temperature reaches the set value. The valve is furnished with 2 heat sensitive elements; in the event of failure of one element, the other will assure that the valve is operational.

Technical Specifications:

  • Body and head: Nickel-plated brass
  • Seals and O-rings: EPDM rubber
  • Spring: Stainless steel
  • Inlet/outlet connections: G3/4” female
  • Capillary Length: 1300 mm
  • Sheath: 1/2” x 145 mm
  • Set temperature: 97° C
  • Max. Operating pressure: 10 bar
  • Drain temperature: 107° C
  • Drain capacity: 6500 litres/h at 8 bar

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