Desulfurization check valve maintenance sales

Shanghai valve repair center is a professional valve repair, valve sales, valves do with the business, the company has a professional valve repair technical team, dedicated service and professional solutions to detect various types of valve sealing surface of the problem is the maintenance and manufacturing and integration business model. Our technical team has been serving in the country's various industrial and energy sectors water pipe network, community property, power, oil and gas, petrochemical, chemical, steel, pharmaceutical, boiler industries. Industry engineers and senior technicians, has a group of experienced, well-trained experts and field service valve maintenance personnel, to check a unique processing technology. 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 non-return valve, check valve, popular talk, medium flow check valve is open, media countercurrent The automatic valve is closed, and its main role is to prevent the media back, to prevent the pump and drive motor reversal, 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 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 check valve according to the structure can be divided into slow closing check valve, lift check valve, swing check valve and butterfly valve and other. Lift check valve can be divided into vertical and horizontal. Swing Check Valve into univalve, double valve type and Orange Peel three. Butterfly valve is straight-through. Check the connection form can be divided into flanged, wafer, welded connections, threaded connections and other four. Pump water off the end of the valve also belongs to check class. Installation, selection and use of check valves should be noted: 1, vertical lift check valve should be installed in a vertical pipe. 2, the level of valve lift check valve should be installed in horizontal pipelines. ? 3, pay attention to the direction of medium flow when the valve installation should be consistent with the direction of the arrow ticket. ? 4, the check valve in the pipeline do not bear the weight of a large check valve should be self-supporting, so that the pressure generated from piping impact. Acting on the valve seat, thereby cutting off the flow. Check the choice, most valve is based on the minimal impact or no impact pressure needed to close the closing speed and closing characteristics of qualitative evaluation for selection. For the non-return valve, the first step is to assess the conditions required for the closing speed, the second step is to select the type of check valve may meet conditions required for closing speed. If the media flow fluctuation range is large or medium flow continuously quick stop and start, use lift check or double check valve to prevent rapid continuous hammering sound and rapid vibration of their ends. Check valve during normal use. If there is a greater shock or water hammer sound, will lead to excessive wear and tear of the valve movable member, premature valve failure or even damage the pump must be avoided closure member results in a rapid and volatile movements. If a check valve or other valve-related technologies, please contact me. URL; http: //www.famenwx.com/