Swing check valve opening and closing is to rely on the media flow force to open and close. Swing check valve belongs to the automatic valve products, Swing check valve only allows the medium to flow in one direction in the pipeline, to prevent the phenomenon of backflow of the medium. Its wide range of use, can be applied to small and large diameter, a variety of media, power stations, high pressure systems used.
Swing check valve open refers to rely on the positive flow of media to open the valve flap, the same reason media backflow to push the valve flap and close, Swing check valve is also called a Swing check valve, Swing check valve, backflow valve and back pressure valve. Mostly belongs to the automatic valve, the main function is used to prevent the backflow of the medium, to prevent the pump and drive motor reversal and the container media release use. Also used for pressure may rise to more than the system pressure in the auxiliary system for safety protection.
Swing check valve can be divided into lift type, swing type, disc type three.
(1) lift type is subdivided into vertical and horizontal 2, lift type structure is moved along the axis.
Examples:
①Lift type silent Swing check valve is used in the pipeline with high quality requirements for water supply and drainage projects; at the same time, it can be installed at the outlet of the pump, requiring relatively high pressure (PN2.5Mpa) of the pipeline network, which is an important product of the waterproof impact Swing check valve.
②Lift-type anechoic Swing check valve is suitable for high-rise building water supply and drainage system and pump outlet, not suitable for sewage pipeline occasions.
③Horizontal Swing check valve is suitable for submersible, drainage and sewage pumps, especially for sewage and sludge system.
(2) Swing-open type is divided into single-valve type, double-valve type and multi-flap type, and the structure of selective-open type is based on the rotation of the center of gravity.
Examples:
①Selective-opening rubber Swing check valve is used in urban water network system, which is not suitable for sewage pipeline with a lot of sediment accumulation.
②Swing-open single-valve Swing check valve is the most widely used, can be installed in water supply and drainage, petroleum, chemical, metallurgical, industrial and other pipelines, the most suitable for the occasion of space restrictions.
(3) Disc type structure for straight-through type.
Example:
①Disc-type double-valve Swing check valve is mainly used in the water supply pipeline of high-rise buildings, containing corrosive media and sewage used in fluid pipeline networks.
②Spin-open single-valve Swing check valve is the most widely used, can be installed in water supply and drainage, petroleum, chemical, metallurgical, industrial and other pipelines, the most suitable for the occasion of space restrictions.
③Horizontal Swing check valve is suitable for submersible, drainage and sewage pumps, especially for sewage and sludge systems.
