Caleffi S.p.a.

Caleffi S.p.a.

- Model NPT 280 - High Flow Thermostatic Mixing Valve

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Boiler protection high-flow thermostatic mixing valve. Changeable thermostatic sensor cartridge. Brass body and lower plug. Max working pressure:  150 psi. Working temp range:  40° - 212°F

Thermostatic sensor cartridge:

  • 130°F and 140˚F Tset standard selections (see below)
  • 115°F and 160°F Tset optional (field replaceable)

Sensor cartridge accuracy:  ±4°F
 
By-pass from boiler complete closing temp:  Tset + 18°F (example:  130˚F + 18˚F = 148˚F)

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