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Check valves differ from butterfly valves

Posted by Bundor valve
What is the difference between a check valve and a butterfly valve?Check valves are opened and closed by medium force, fluid can only flow in one direction.Butterfly valve belongs to the shutoff valve, open and close by external force to carry out, and two-way can be installed.In addition check valve and butterfly valve characteristics are not the same.
Check valves differ from butterfly valves
Check valve features

Check valve refers to the flow of the medium itself and automatically open and close the valve disc, used to prevent the reverse flow of the medium valve, also known as check valve, one-way valve, counterflow valve, and back pressure valve.Check valve belongs to a kind of automatic valve, its main role is to prevent the reverse flow of the medium, prevent the pump and drive motor reversal, as well as the discharge of the container medium.

Check valve This type of valve is characterized by allowing the medium to flow in only one direction and preventing the opposite direction of flow.Usually, this valve works automatically. Under the action of fluid pressure flowing in one direction, the valve disc opens.When the fluid flows in the opposite direction, the fluid pressure and the self-coincidence of the valve disc act on the valve seat, thus cutting off the flow.

Butterfly valve characteristics

Butterfly valve is a disc type open and close parts reciprocating rotation 90?A valve used to open, close, and regulate a fluid passage from left to right.


(1)Simple structure, small size, light weight, saving supplies, not used in large caliber valves;
(2)fast opening and closing, small flow resistance;
(3)can be used for medium with suspended solid particles, according to the strength of the sealing surface can also be used for powder and granular medium.It can be used for bidirectional opening and closing and regulation of ventilation and dust removal pipelines. It is widely used in gas pipelines and waterways of metallurgical, light industry, electric power, petrochemical system, etc.


(1)the flow adjustment range is not large, when open up to 30%, the flow will enter more than 95%;
(2)Because of the structure of butterfly valve and the limitation of sealing materials, it is not suitable for high temperature and high pressure piping system.General working temperature below 300℃, PN40 below;
(3)Sealing performance relative to the ball valve, globe valve is poor, so it is used for sealing requirements are not very high places.