when the valve is in the closed state, the seat ring on the upstream and downstream sides cuts off the fluid and the accumulated matters in the middle cavity of the body can be excreted. Classical furniture. reduce pollution to the valve due to the medium replacement. The excreting device features the following functions Trunnion Mounted Ball Valve when an abnormal pressure rise occurs with the medium stayed in the middle cavity of the valve due to rising temperature, AnSenSEOthe packing on the stem portion can be re4placed when the valve is the fully opened or closed state under the working pressure. Top Entry Ball ValveTo prevent electrostatic spark from being produced, an electrostatic-proof device is mounted on the valve, which can guide the charges out through the electric path formed by both ball and body via the spring.Correction tapethe valve can be still reliably operated to prevent the fire from expanding and the seat ring’s support can be contacted with the ball to act as an instantaneous seal, conforming with API607. Api Ball Valve an instantaneous sealing action can be made available by injecting sealing grease through the grease injecting valve.  Reproduction Furniture during valve operation, the friction between the ball and the PTEE seat ring will produce electrostatic charges and they will be accumulated onto the ball  Bag Making Machine.if the Teflon seat ring is made softened and burnt in case of a fire or an abnormal temperature rise, Curtain Eyelet when the sealing parts of both seat ring and stem get damaged and thus leaks are caused,  can check if the seat ring leaks or gets damaged beforehand. Capsule Machine the seat ring will come off form the ball and automatically discharge pressure or the safety valve mounted on the body ensures the system safety.the unique sealing mode of the ball valve makes the fluid completely cut off.