Thermal shutoff
In the event of a failure of either the hot or cold supply, the piston will shut off, stopping water
discharging from the mixed water outlet. The Caleffi
5213 series thermostatic mixing
requires a
minimum temperature differential from hot inlet to mixed water outlet of 18°F (10°C) to ensure the
correct operation of the thermal shutoff feature.
COLD
HOT
MIXED
4
Sweat version
Operating principle
The thermostatic mixing valve mixes hot and cold water in such a way as to maintain constant set
temperature of the the mixed water at the outlet. A thermostatic element is fully immersed into the
mixed water. This element then contracts or expands causing movement of the piston, closing
either the hot or cold inlets, regulating the flow rates entering the valve. If there are variations of
temperature or pressure at the inlets, the internal element automatically reacts to restore the original
temperature setting. In the event of a failure of either the hot or cold supply, the piston will shut off,
stopping water discharging from the mixed water outlet.
NPT version
COLD
HOT
MIXED
sweat connections
version
COLD
HOT
MIXED
connections
Compression version
PEX crimp version
