Check valve

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Check valve

Post  landoo on Mon Nov 19, 2012 7:14 pm

Check valve, also known as a one-way valve or check valve, and its role is to prevent the media back in the pipeline. The bottom of the pump suction pipe valve is a check valve class. Check valve structure is divided into lift check valve, swing check valve, butterfly valve three. Lift check valve can be divided into vertical and horizontal. Swing check valve is divided into the univalve, double valve type and Orange Peel-three. Butterfly valve straight through the above types of check valves in connection formally can be divided into the threaded connection, flange connection and welding of three. Opening and closing pieces by medium flow and force itself on or off, to prevent the media back valve called a check valve. Check valves are automatic valves, main pipeline for way flow of media, and allows the media to flow in one direction only, in order to prevent accidents.
Check valve structure is divided into lift check valve, butterfly valve three. Lift check valves can be divided into vertical and two straight-through. Swing check valve is divided into the univalve, double valve type and Orange Peel-three. Butterfly valve disc flap disc the univalve, above several non-return valve at the connection formally can be divided into threaded connection, flange connection, welding, and four kinds of clip-on connection.
Check valve is the media itself flow automatically open and close the valve, used to prevent medium backflow valve , also known as a check valve, check valve, reflux valve, and back pressure valve. The check valve is an automatic valve, its main role is to prevent the media back to prevent the pump and drive motor reversal, as well as container media bleeder. The check valve can also be used to pipeline pressure may rise to more than the system pressure auxiliary system to provide supplies. The non-return valve can be divided into the swing check valve (rotate by the center of gravity) and lift check valves (along the axis of movement). The role of the check valve is only allow the medium to flow in one direction, but prevents flow in the opposite direction. Usually the valve is automatically work in a direction of flow of fluid under pressure, the valve opens; fluid flow in opposite directions, from the coincidence of the valve role of fluid pressure and the valve on the valve seat, thereby cutting off the flow.
The butterfly double valve check valve suitable for high-rise building water supply network, certain chemically aggressive media pipe network installation space is limited pipeline network, also applies to the sewer network.
Lift mute check valve suitable for high quality requirements of water supply and drainage pipe network; pressure requires a relatively high pipe network (PN2.5Mpa); can be installed in the pump outlet, is economical and practical water hammer check valve.
Lift muffler check valve suitable for high-rise building water supply and drainage system, pipe network, can be installed in the pump outlet, the structure is modified, can be used as absorbent bottom valve, but does not apply to the sewer network.
Horizontal check valve is suitable for diving, drainage, sewage pumps, especially suitable for sewage and sludge systems.
Swing rubber check valve is applicable to life but does not apply to the water supply network; sediment sewage.
Swing univalve check valve is most applicable to the place of installation space restrictions apply to the water supply system, petroleum, chemical, metallurgy and other industrial sectors.

landoo

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