Backflow valve to prevent media

 Valve to prevent backflow of the media is allowed only in one direction to the flow of media, but also to prevent the flow direction. This valve is usually the work automatically, in a direction of flow of fluid under pressure, open the valve; fluid flowing in the opposite direction, fluid pressure and the valve from the valve since the role of coincidence in the valve seat, thereby cutting off the flow. Non-return valve which belongs to this type of valve, which includes Swing Check Valve Check Valve and the take-off and landing. Swing Check Valve bodies are ordinary hinge, there is a door the same as the free flap valve against the valve seat sloping surface.

     In order to ensure that every valve seat surface to reach the appropriate position in the valve hinge design in order to have a valve Swing have sufficient space and the real valve, all-round contact with the valve seat. Valve could be made of metal can also be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements. Swing Check Valve fully opened in the circumstances, almost unimpeded fluid pressure, so the pressure drop through the valve is relatively small. Take-off and landing flap-type check valve is located at the valve seat sealing surface of the body. In addition to this valve valve is free to take-off and landing, the other part as the same cut-off valve, fluid pressure valve lift from the valve seat sealing surface, leading to medium return valve to the valve seat down, and cut off the flow. Under the conditions of use, valve can be all-metal structure can also be rack mounted in the valve rubber mat or rubber ring form. The same as the cut-off valve, fluid movements through the channel-type check valve is narrow, and therefore through the movements of the pressure drop Check Valve Swing Check Valve than larger, and Swing Check Valve flow restrictions rarely. valve ball valve gate valve check valve globe valve butterfly valve
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