The purpose of this type of valve is to allow only the medium to flow in one direction and to prevent the flow in the direction. Usually this kind of valve is automatic working, the valve flap opens under the fluid pressure flowing in one direction; when the fluid flows in the opposite direction, the valve flap is acted upon by the fluid pressure and the self-weight of the valve flap to cut off the flow. Which check valve belongs to this type of valve, which includes the swing check valve and lift check valve. Swing check valves have a hinged hinge mechanism and a flap-like flap freely rests against the slanted seat surface. To ensure that the valve flap reaches the proper seating surface every time, the valve flap is designed in the hinge mechanism so that the valve flap has enough swivel-open space for true and complete valve flap contact. The valve flap can be made entirely of metal, or it can be fitted with a leather, rubber or synthetic cover over the metal, depending on the performance requirements. Swing check valve in the fully open condition, the fluid pressure is almost unimpeded, so the pressure drop through the valve is relatively small. Lift check valve seat is located on the valve seat sealing surface. In addition to the valve flap valve can be freely up and down, the rest of the same as the cut-off valve, the fluid pressure from the valve seat sealing surface lift up, the media back to the valve seat caused by the valve back down and cut off the flow. Depending on the conditions of use, the valve disc can be of all-metal construction or it can be in the form of a rubber gasket or rubber ring inlaid on the valve disc holder. Like the stop valve, the passage of fluid through the lift check valve is also narrow, so the pressure drop through the lift check valve is larger than the swing check valve and the flow through the swing check valve is limited Few. Check valve common failures and treatment methods Common failures are: â‘ valve broken; â‘¡ media back. Caused by the valve is broken because: before and after the check valve medium pressure is close to balance and mutual "see-saw" state, the valve flap often flap and some brittle materials (such as cast iron, brass, etc.) made of Disc is broken. Prevention is to use the valve for the tough material check valve. The reasons for the media back flow are: â‘ sealing surface damage; â‘¡ clip into the impurities. Repair the sealing surface and cleaning impurities to prevent backflow.
KRTP Cloud Control System Host
Cloud Control System Host,Outdoor Light Control Project,Cloud Control System Host Program,KRTP Cloud Control System Host
Sichuan Kangruntengpu Photoelectric Technology Co., Ltd. , https://www.krtoplighting.com