Introduction of the main features of the development of the check valve
Classification:
Release Time：2021-02-01
Check valve according to the structure, can be divided into lift check valve, swing check valve and butterfly check valve three. Lift check valve can be divided into two kinds of vertical and horizontal. Swing check valve is divided into single disc, double disc and multi-valve three.
Check valve according to the structure, can be divided into lift check valve, swing check valve and butterfly check valve three. Lift check valve can be divided into two kinds of vertical and horizontal. Swing check valve is divided into single disc, double disc and multi-valve three. Butterfly check valve is straight through type. Check valve in the form of connection can be divided into flange connection, clamp connection, welding connection, threaded connection and other four.
The check valve belongs to the automatic valve category, mainly used for the medium one-way flow of the pipeline, only allows the medium to flow in one direction to prevent accidents. Opening and closing parts by the medium flow and power to open or close on their own to prevent the medium back flow of the valve. It is mainly used in the pipeline with one-way flow of medium, and only allows the medium to flow in one direction to prevent the medium from flowing back in the pipeline.
Check valve according to the structure, can be divided into lift check valve, swing check valve and butterfly check valve three. Lift check valve can be divided into two kinds of vertical and horizontal. Swing check valve is divided into single disc, double disc and multi-valve three. Butterfly check valve is straight through type. Check valve in the form of connection can be divided into flange connection, clamp connection, welding connection, threaded connection and other four.
All kinds of valves in operation shall be complete and intact. The bolts on the flange and bracket are indispensable, and the thread should be intact without loosening. If the fastening nut on the handwheel is found to be loose, it should be tightened in time to avoid wearing the connection or losing the handwheel and nameplate. If the handwheel is lost, it is not allowed to be replaced by a live wrench, and it should be equipped in time. Packing gland shall not be skewed or have no preload clearance. For valves that are susceptible to rain, snow, dust, sand and other contaminants, the valve stem should be installed with a protective cover. The scale on the valve shall be complete, accurate and clear. The lead seal, cap and pneumatic accessories of the valve shall be complete and intact.
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2026/02/28
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