●1.100% brand new and high quality ●2. Small body and stable performance ●3. If the pressure in the equipment or pipe exceeds the allowable value, the valve will automatically open and discharge the full amount ●4. When the pressure is low, the valve will automatically close to ensure the safe operation of the device ●Can be used for a variety of brands such as steam generators, electric boilers, coal-fired boilers, etc. 5.