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Threaded Vertical Type Check Valve


Threaded vertical check valve, also known as threaded vertical non return valve, reflux valve, one-way valve or counterbalance valve, is valve that is applied to prevent backflow of medium. This vertical check valve is also employed to stop reversal of pump and driving motor. It is mainly composed of valve body, disc and spring.

Application of Threaded Check Valve

Threaded vertical check valves can be widely applied in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, and other pipeline systems.


1. It is installed on one-way flow pipelines and can be installed easily both on vertical and horizontal pipelines.
2. Threaded vertical check valve features rational structure, reliable sealing and beautiful shape.
3. Two times shot blasting processing of valve surface make the valve look fine and smooth.
4. CNC processing technology is adopted to produce disc.
5. Disc is with high strength and stiffness.
6. Disc restrainer is designed to prevent that the open position of disc is too high to be shut down.
7. Small friction between sealing surfaces ensures low wear rate of threaded vertical check valves.
8. The disc sealing surface can be customized. Customer can choose sealing material according to media in order to increase sealing property and wear resistance according to requirement.
9. Disc closes fast because the travel journey of disc is small

Parameters of Threaded Check Valve

Size Item 1/2" 3/4" 1" 11/4" 11/2" 2"
D 15 20 25 32 40 50
L 56 67 74 86 91 100

Working Principle of Threaded Check Valve

Threaded vertical check valve opens and closes automatically depending on force from media flowing. It allows medium to flow through it in only one direction, and prevents reverse direction flow. Disc will open under the pressure of forward flow fluid. When fluid flows in reverse direction, the disc will be closed by fluid pressure and dead weight so as to cut off the flow.


1. Before installing threaded vertical check valves, please make sure no dirt is attached to valve cavity and that screw bolt is evenly screwed down.
2. When installing the valve, please ensure that the media flow direction should be consistent with the arrow direction marked on valve body.
3. When operating the valve, do not make it bear weight in pipeline. Large check valve should have independent support to ensure that threaded vertical check valve will not be affected by pressure from pipe system.

Package, Transportation, Payment & Warranty

1. Standard exporting wooden cases are employed for packaging.
2. Threaded vertical check valves are transported by air, sea or railway.
3. Products can be paid by T/T, D/P, D/A, L/C, and so on.
4. All our pipe valves have 18 months warranty.
Wenzhou Kerui Valve Industry Co., LTD is a professional manufacturer and supplier of threaded check valves in China. Our main products cover ball valves, gate valves, globe valves, check valves, forged steel valves and strainers. Our threaded vertical check valves are widely applied in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, shipbuilding, metallurgy, and energy pipeline systems.