Working Principle of Axial Flow Check Valve
The axial flow check valve is an automatic valve used to prevent medium backflow in pipelines. It mainly consists of core components such as the valve body, valve cover, valve disc, and spring. The valve body serves as the main structure, with an internal flow guide channel designed to ensure smooth fluid movement and a valve seat for sealing. The valve cover is used to connect the valve to the pipeline system. The valve disc is the key moving component, which opens or closes under fluid pressure. The primary function of the spring is to provide preload, ensuring the valve disc remains closed when there is no flow.The main check valve product names of China Check Valve Network include:Flange Lift Copper Check Valve，No-load Running Check Valve，Flange Jacket Insluation Check Valve，Energy-saving Shuttle Check Valve，Pound Power Station Swing Check Valve，Flange Vertical Foot Valve，Hydraulic Lift Check Valve
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The working principle can be divided into two main processes:Check Valve News
1. Forward Flow of Medium, Valve Opens:
When the medium flows normally in the intended direction, the fluid pressure overcomes the spring preload, pushing the valve disc away from the valve seat, thereby opening the valve. The flow guide structure (such as guide vanes or a flow guide sleeve) within the guide channel effectively directs the fluid, ensuring smooth flow with minimal pressure drop. Simultaneously, this design creates a dynamically balanced, slight negative pressure zone behind the valve disc. The function of this slight negative pressure zone is to assist the spring in initiating the immediate closing action of the valve disc once the upstream medium flow stops or pressure decreases.
2. Imminent Backflow of Medium, Valve Closes Rapidly:
When the system pressure becomes unbalanced and the medium is about to reverse direction, the reverse fluid dynamic pressure combines with the constant spring force. This combined force rapidly and firmly pushes the valve disc against the valve seat, achieving a tight seal. At this moment, the flow guide structure also helps direct the reverse fluid, cooperating with the valve disc to complete the closing action, thereby effectively blocking medium backflow and protecting upstream equipment.Check Valve Technology
This working principle, which combines optimized fluid dynamics design (flow guidance and slight negative pressure effect) with spring-assisted closing, endows the axial flow check valve with features such as low flow resistance, rapid closing, reduced water hammer effect, and smooth, quiet operation.
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