23422B Thermal Relief Valve 1/2 NPT 140 Degrees

23422B Thermal Relief Valve is a 1/2" NPT that is designed to remove hot fluid from the inlet chamber of the pump.
This TRV will automatically reset once the fluid temperature is below the set point of the valve.
23422B is designed to help prolong seal life of the high pressure pump.

The Automatic Thermal Relief Valve is a must for any system utilizing a closed loop bypass line or internal bypass. The valve is designed to protect your pump and accessories against extreme heat when the pump is in bypass. When the temperature of the water in the by-pass line reaches the preset temperature of the valve a small amount of hot water is re-leased which is replaced by cooler supply water. This in turn lowers the temperature of the water in the bypass line thus signaling the valve to close. NOTE: The thermal relief valve works most effectively on pumping systems having positive inlet pressures.