Manual reversing valve is a directional control valve with more than two flow forms and more than two oil ports. Is to achieve the communication of hydraulic oil flow, cut off and reverse, as well as pressure unloading and sequential action control valve. It can be divided into manual reversing valve, electromagnetic reversing valve, electro-hydraulic reversing valve and so on. Also known as the Chris valve, a type of valve, with multi-directional adjustable channel, can timely change the flow direction.

When working by the drive drive mechanism outside the valve rotation drive shaft, with shaking arm, start the valve plate, so that the working fluid sometimes from the left inlet to the lower outlet of the valve, sometimes from the right inlet transformation to the lower outlet, to achieve the purpose of periodic flow direction transformation.

This kind of valve is widely used in petroleum and chemical production, and is commonly used in ammonia gas production system. In addition, the reversing valve can also be made into a disc type structure, more for smaller flow occasions. When working, only turn the handwheel through the disc to change the flow direction of the working fluid. Accurate action, high degree of automation, stable and reliable work, but need to be equipped with a drive and cooling system, the structure is relatively complex; Disc type structure is simpler, more used for the flow of small production process. In petroleum, chemical, mining and metallurgy industries, six - way reversing valve is an important fluid reversing equipment. The valve is installed in the lubricating oil pipeline of the thin oil lubrication system.