Mounting : Suitable for Both Horizontal and Vertical Installation Design : Single Plate Wafer Type Swing Check Valve Face to Face : API594 Flange Drilling : BS10 Table E ANSI B16.5 Class 125/150 Leakage Class : Zero Leakage, Minimum Pressure : 1 Bar Valve is used for preventing the back-going of medium in pipelines and equipments, and the pressure of medium will bring the result of opening and closing automatically. When the medium is back-going, valve disc will automatically closed to avoid accidents.