Tilting Disc Check Valve structure characteristics, classification action, working principle and details

Check valve also known as check valve, check valve, a one-way valve or check valve, and its role is to ensure the directional flow in the pipeline without backflow function. The bottom valve pump suction pipe valve category also belong. Check valves are automatic valves, pressure 1.6~25MPa/Class150-2500/2.0-42.0MPa working temperature is -29~+550 ℃, materials are: steel WCB, HT250, HT200. Cast iron, QT350, QT450, alloy steel WC6, WC9, CN7M stainless steel CF8 (M), CF3 (M). A105 forging steel, F304 (L), F316L piping. Various conditions of the petroleum, chemical, pharmaceutical, chemical, electric power industry and so on, it is used to water, oil, steam, acid medium. Is the control of the medium in the pipeline one-way flow valve, used to prevent the media back in the pipeline.

Tilting Disc Check Valve

Tilting Disc Check Valve

. swing check valve is divided into single type, double valve and valve type three. Separable connection, flange connection, welding connection and connected to the clip four is a thread in the connection form.

Opening and closing pieces by medium flow and the forces to open or close, backflow valve to prevent the media called the Tilting Disc Check Valve. Check valves are automatic valves, mainly for one-way flow of media channels, only allowing media to flow in one direction, to prevent accidents.

Check valve installation should pay attention to the following matters:

1, in the pipeline not to bear the weight of a large check valve, non-return valve should be independent of support, so that is not affected by the influence of pressure piping system.

2, the installation media attention to the direction of flow should be consistent with the body of the arrow.

3, the vertical lift check valve should be installed in a vertical pipe.

4, the level of valve lift check valve should be installed in horizontal pipelines.

Working principle.

Check valve is to rely on the flow of the medium itself automatically open and close the valve, backflow valve to prevent the media, also known as check valve, Dan Xiangfa, the Pressure Seal Check Valve and the back pressure valve. Check valve is an automatic valve, the main role is to prevent the media back, to prevent reverse pump and drive motor, and discharge the container medium. Check valve can also be used for the pipe to the pressure may rise to the auxiliary system supplies more than the system pressure. Check valve can be divided into swing check valve (according to the focus of rotation) and lift check valves (along the axis of movement).

Check valve is the role of this type of valve is only allowing media to flow in one direction, and stop the flow in the opposite direction. Usually the valve is automatically work, the fluid pressure in a direction of flow, the valve flap to open; the opposite direction of fluid flow, the fluid pressure and the self valve coincidence role in the valve seat, thereby cutting off flow.

Non return valve which belongs to this type of valve, which includes swing check valves and lift check valve. Swing check valves are ordinary hinge, there is a door the same as the valve seat tilt freely against the surface. In order to ensure that each valve flap valve seat surface can reach the appropriate position, the valve flap design in the hinge, so that the valve flap is enough to swing space, and make a real flap valve, comprehensive engagement with the valve seat. All valve can be made of metal, metal can also be embedded in the leather, rubber, or synthetic coverage, depending on performance requirements. Swing check valve in the fully open position, the fluid pressure is almost unimpeded, so the pressure drop through the valve is relatively small. Valve lift check valve located in the valve seat sealing surface. In addition to this valve disc is free to lift, like the rest of the cut-off valve, the fluid pressure valve from the valve seat sealing surface lift, medium return led to the valve seat valve down, and cut off the flow. Under the conditions of use, the valve can be all metal structure, and can also be rack mounted in the valve rubber mat or rubber ring form. The same as the cut-off valve, lift check valve fluid through the channel is narrow, so the check valve by lifting the pressure drop than the swing check valve is bigger, and swing check valve flow restrictions very little.

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