The valve opens the outlet on reaching the settings for:
- temperature: the thermostat compound inside the temperature sensor 1) submerged in the hot
water storage heater, expands as the temperature increases. This expansion causes a thrust
pin to move and act on the obturator 2) opening the valve. The valve is set to open at
temperatures of over 90°C.
- pressure: the obturator, opposed by a set spring, raises on reaching the pressure setting and
opens the outlet completely. The pressure setting is chosen according to the maximum
permissible pressure in the system.
As the temperature and pressure decrease, the opposite action occurs with the valve
subsequently reclosing within the set tolerances.
Before installing a TP relief valve it is necessary for the sizing to be performed correctly by specialized technical personnel in accordance with
the current regulations for the specific applications. Any use other than the intended use is prohibited.The TP relief valves must be installed by qualified technical personnel in accordance with current regulations.
The TP relief valve must be installed observing the direction of flow indicated by the arrow on the valve body.Assembly Plumbing system TP relief valves must be installed on the top of the hot water storage heater, making sure that the temperature sensor is correctly submerged in the tank.
Make sure that there are no shut-off devices between the valve and the storage heater.TP relief valves can be fitted vertically or horizontally, but not overturned.
This prevents debris from impairing operation.