Special sealing components are configured at the interfaces, which can effectively leakage and ensuring the stability and sealing of pressures control Adopting a connecting interfaces design, coupled with sealing rubber rings, it can achieve insertion and removal connection with pipelines, improving the efficiency of installation and replacement operations Set the exhaust pressure to 1-3bar and the relief pressure to 12-15bar, with control of double pressure values, which can effectively adapt to the pressure management requirements of corresponding working conditions Make of engineering plastics, it is lightweight and has good resistance, suitable for working environments with various none corrosive media The cores pressure relief function can quickly release overpressure media, avoiding damage to pipelines or equipment due to overpressure, and providing stable ensuring for systems operate