Changzhou City, Xiao source Machinery Co., Ltd. production valve works: check valve means relying on the flow of the medium itself automatically open and close the valve, the valve to prevent the media back, also known as a one-way valve or a back pressure valve . Check valves are an automatic valve mechanical diaphragm metering pumps, whose main role is to prevent the media back, to prevent reverse pump and drive motor, and discharge the container medium. Pressure valve which can also be used to exceed the system pressure may rise auxiliary systems provide supply pipeline. Check valve can be divided into the swing check valve (depending on the focus of rotation) and lift check valves (axial movement). The role of this type of check valve is only allowed media to flow in one direction and prevent flow in opposite directions. Usually the valve is automatically work in a direction of flow of fluid pressure effect, the valve opens; opposite direction of fluid flow from the fluid pressure and the valve flap from the coincidence of acting on the valve seat, thereby cutting off the flow. Check them belong to this type of valve universal metering pump, which includes swing check valves and lift check valves. Swing Check Valve with ordinary hinge, there is a door on the same disc as the freedom leaning tilt seat surface. To ensure that the valve position every time to reach the right side of the seat, the valve flap design in the hinge body to valve flap has enough to swing space, and make a real flap valve, comprehensive engagement with the valve seat. Valve can all be made of metal can also be embedded in the leather, rubber on metal, or synthetic coverage, depending on performance requirements. Changzhou City, Xiao source Machinery Co., Ltd. is a safety valve opening and closing pieces by the external force is normally closed state, when the device or media pressure inside the pipe rises above a predetermined value, through to the outside of the system to prevent the emission medium piping or equipment in the medium pressure exceeds a predetermined value of special valves. Safety valves are automatic valves metering pumps, mainly used for boilers, pressure vessels and piping, control pressure does not exceed a predetermined value metering pump Buying, personal safety and equipment operation plays an important protective role. Note the safety valve must be pressure tested before use. Valve play a security role in the system. When the pressure exceeds a predetermined value, the valve is opened, the system portion of the gas / fluid into the atmosphere / pipe outside, so that the system pressure does not exceed the allowable value, in order to ensure the system is not due to excessive pressure and accidents. Hydraulic diaphragm metering pumps, metering pumps Changzhou, Changzhou Changzhou source is Xiao Xiao source Machinery Limited. Changzhou City, Xiao source Machinery Co., Ltd. (www.czxiaoyuan.com) (www.czxiaoyuan.com) strong, credible, in Changzhou, Jiangsu reciprocating pumps, metering pumps and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiao source Machinery and you hand into the brilliant, for a better future!