1. Product Description
PT valve is a pressure and temperature safety valve, for pressure-type solar water heaters (closed containers) and can protect system by temperature and pressure. It is a safety protection device for solar water heaters.
In the tank of solar heating system, when water temperature rises, the volume of the water expands, and the pressure inside increases at the same time. PT valve has two working on modes, pressure and temperature.
2）When the temperature of tank increases to the set value, PT valve open then water drain out meanwhile cold water enters the tank to protect the solar water heating system by reduce temperature and pressure inside.
2. Working principle
PT valve does not rely on any external force, but uses the force of the medium itself and the force generated by the thermal expansion of the temperature sensing element to overcome the load of the spring to open the valve flap,drain the rated amount of fluid to prevent pressure and temperature from exceeding the rated safety value.
When the pressure and temperature return to normal, the valve closes again and prevents the media from continuing to flow out.
3. Technical Parameters
4. Product installation
5. Product installation