The slow closing check valve is composed of a main valve 2, a check valve 5, a needle valve 1 and a ball valve 3, a pressure valve table 4 and the like. The slow closing check valve has the functions of opening and closing speed regulation and backstop. The valve installation can effectively control the water pump to automatically adjust to the optimal opening and closing speed when starting and stopping the water pump. It is generally divided into two types: diaphragm type and piston type. The caliber of slow closing type check valve produced by our factory adopts the diaphragm type below DN500mm, and the piston diameter is used above DN600mm. The principle of the two actions is similar. Widely used in industrial water supply, high-rise buildings directly from the water pump to the water system, reduce the water cone and water hammer phenomenon, to achieve a safe shutdown effect.

Slow closing check valve, also known as check valve, its role is to prevent the media back in the pipeline. The opening and closing parts are opened or closed by the medium flow and force to prevent the medium from flowing back. The check valve is an automatic valve and is mainly used in the medium of one-way flow. It only allows medium to flow in one direction to prevent accidents. This type of valve should generally be installed horizontally in the pipeline.