300X slow closing check valve from the main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge hydraulic control over the system. The use of automatic hydraulic operating valve manufacturers, can get the best of the main valve opening or closing speed. Chung hit the water to prevent water production, in order to achieve the effect of slow closing silencer. The products use the hydraulic self-control, no other devices and energy, maintenance is simple, open and close smoothly slow. This series of valves are widely used in high-rise buildings, living quarters and other water supply systems and urban water supply project. Ball check valve flap is coated with rubber or plastic sphere, and therefore reliable sealing performance. Ball valve according to its nominal diameter size, a single ball and more ball of the points. Its sealing principle is: When the pump, medium forward flow medium pressure generated push the ball movement, stay away from the seat along the guide sealing surface, the check valve will open, the medium through; when the pump stops, medium reverse flow pressure pushes the ball rolled along the guide posts seat sealing surface, closed valve, by the pressure of the working medium, so that between the ball valve and seat sealing surface in certain specific pressure relief valve closed sealing works, ensure valve seal, to prevent the media countercurrent purposes. Because of the spherical ball valve and check valve seat sealing surface of the contact surface is narrow valve, the media work under the same pressure, the line seal hermetically sealed than the specific surface pressure, and therefore reliable sealing. But the ball check valve seal ball covered with rubber or plastic, and therefore the operating temperature is limited material, typically medium temperature below 150 degrees. Vertical Check Valve | Check Valve | Electromechanical England by City Electrical Equipment Co., Ltd. of England. England City Mechanical and Electrical Equipment Co., Ltd. (www.gdyinglun.com) strong, credible, hydraulic machinery and components industry in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead England into the brilliant electromechanical and you work for a better future!