... path, almost zero flow resistance.3) Soft sealing seat with credible sealing property which canachieve zero leakage;4) Anti-static ... TS, ISO90012. Design: refer to GB12338,MSS-SP-683. Face to face: refer to GB12221-894. Flange standard: JB/T79.1- ... , especially applicable to the automation control of fluids with fibre, granule, or with greaterviscosity, and special gaseous media such as oxygen ...