Audo Look6.0 downloadCheck valve is the valve that can prevent a fluid automatically to flow backwards. The valve of a powerful person of check valve issues open in fluid pressure action, the fluid exports side from import side flow direction. Should import lateral pressure under exit when side, valve of a powerful person presses the element action such as gravity of poor, itself to fall to be shut automatically in the fluid flow backwards in order to prevent a fluid.
Check valve is divided commonly fall to rise type, come back open a few sort such as type, butterfly type and diaphragmatic type model.
Litre fall the composition of type check valve is general as similar as shut-off valve, valve of its a powerful person along make with the line in the passageway litre fall motion, the action is credible, but fluid resistance is greater, apply to light small-bore circumstance. Litre fall type check valve but direct form and vertical two kinds. Direct form rises fall check valve can be installed only commonly in horizontal pipeline, and vertical rises fall check valve is in with respect to installation commonly perpendicular pipeline.
Come back the valve of a powerful person of the check valve that open type circles runner shaft to make whirligig. Its fluid obstruction is less than commonly litre fall type check valve, it applies to the circumstance of larger requirements. Come back the amount of valve of a powerful person of basis of the check valve that open type can be divided for univalve come back open type, double valve to come back open type and much valve to come back open type 3 kinds. Univalve come back the circumstance that opens type check valve to apply to medium caliber commonly. Large requirements pipeline is chosen univalve come back when the check valve that open type, to reduce water hammer pressure, had better use the delay that can reduce water hammer pressure to close check valve. Double valve comes back the check valve that open type is applied to big in caliber pipeline. Start construction of type check valve to placing pair of valve to come back small, weight is light, it is the check valve with a kind of rapidder development; Much valve comes back the check valve that open type applies to large requirements pipeline.
The structure of butterfly type check valve is similar to butterfly a powerful person. Its structure simple, flow resistance is lesser, water hammer pressure also lesser.
Diaphragmatic type check valve has a variety of configuration, all use diaphragmatic as open shut, because its are waterproof hammer performance is good, the structure is simple, cost is low, development is rapidder in recent years. But the use temperature of diaphragmatic type check valve and pressure get the limitation of diaphragmatic material.
-- news source: Always fine county limited company of Zheng Xu valvePrevious12 Next