The 2521 series tempering valve is typically used in solar heating systems to step down and control the high incoming temperature to a
pre-set temperature, able to be used on the secondary circuits. Its function is to maintain the temperature of the mixed water supplied to the
user constant at the set value when there are variations in the conditions of the hot and cold water at the inlet.

This valve is not approved as a tempering valve or thermostatic mixing valve and should only be used in non-potable applications such as closed
loop solar heating systems