Haining oupairineng solar water heater co. ltd.

Description:
TP Valve,it is also called pressure and temperature valve and connected with solar water heater tank.one device to limit pressure and temperature of solar water heater tank.

 Function:

The  valve is designed to relieve the increase in pressure which develops during the normal heating cycle.This is caused by the water expanding during the heating cycle.The T/P valve then will relieve the increase in pressure by releasing drips of hot water to the drain line. It is recommended that an expansion control valve be fitted to the cold water supply line as it will relieve cold water(not hot water),during the heating cycle expansion,thereby saving energy and increasing the life of the T&P relief valve.Local regulations may make it mandatory to install an expansion control valve in the cold water supply line.Should the electrical temperature cut-out devices cease to operate correctly,the water will overheat and the temperature probe will then be activated to open the P/T valve,discharging hot water.