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BOILER PROTECTION VALVES
Boiler protection high-fl ow thermostatic
mixing valve.
Changeable thermostatic sensor cartridge.
Brass body and lower plug.
Max. working pressure: 150 psi.
Working temperature range: 40—212ºF.
Thermostatic sensor cartridge:
130°F & 140°F Tset standard selections,
see below
115°F, 160°F Tset optional (fi eld
replaceable).
Sensor cartridge accuracy: ±4°F.
By-pass from boiler complete closing
temperature: Tset +18°F (ex. 130°+18°=148°F).
Boiler protection high-fl ow thermostatic
mixing valve.
Changeable thermostatic sensor cartridge.
Brass body and lower plug.
Max. working pressure: 150 psi.
Working temperature range: 40—212ºF.
Thermostatic sensor cartridge:
130°F & 140°F Tset standard selections,
see below
115°F, 160°F Tset optional (fi eld
replaceable).
Sensor cartridge accuracy: ±4°F.
By-pass from boiler complete closing
temperature: Tset +18°F (ex. 130°+18°=148°F).
280
ThermoMix™ NPT
280
ThermoMix™ Sweat
Code Description Cv Pk Lbs USD
280165A 1" NPT 130ºF Tset 10 1 3.6 422.00
280166A 1" NPT 140ºF Tset 10 1 3.6 422.00
280175A 1¼" NPT 130ºF Tset 14 1 4.5 485.00
280176A 1¼" NPT 140ºF Tset 14 1 4.5 485.00
Code Description Cv Pk Lbs USD
280965A 1" sweat 130ºF Tset 10 1 3.6 395.00
280966A 1" sweat 140ºF Tset 10 1 3.6 395.00
280975A 1¼" sweat 130ºF Tset 14 1 4.5 465.00
280975A 1¼" sweat 140ºF Tset 14 1 4.5 465.00
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The thermostatic sensor can easily be removed
for maintenance or to change the setting, with no
need to remove the valve body from the piping.
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The valve can be installed on both sides of
the boiler in any position, vertical or horizontal.
Installation is recommended on the return to the
boiler in mixing mode; it can also be installed on
the fl ow from the boiler in diverting mode.
FUNCTION
The ThermoMix™ boiler protection high-fl ow thermostatic mixing valve is
used in hydronic heating systems with non-condensing boilers, including
solid fuel, biomass, gas, LP or oil-fi red. It can be installed with steel, cast
iron and copper tube style boilers, automatically controlling the return water
temperature, preventing condensation of the water vapor contained in the
fl ue gas.
The 280 series ThermoMix™ valve mixes by-pass fl ow from the boiler with
return fl ow from the system, sending a fi xed temperature fl ow to the boiler
which protects against corrosion from condensation occurring when a
minimum fl ue gas temperature is not otherwise maintained.
Changeable thermostatic sensor cartridges modifi es valve temperature
setting. The thermostatic sensor cartridge can easily be removed for
maintenance or to change the valve set temperature, with out removing the
valve body from the piping.