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The Working Principle Of The Screw Down Non Return Valve

Edit:Vatac Vango Valves (Wenzhou) Corp      Date:Jun 12, 2016

The Screw Down Non Return Valves also abbreviated to SDNR valves, have the function of stop and non return.

So a lot of people want to know, How does it work to realize two functions in the same valve?

The SDNR valves have the same appearance and structure with the Globe valves except the disc.

The SDNR valves’ stem and disc is separated, when stem screw down, stem work on the disc and close the valve, but when stem screw up, the stem will leave the disc and can not take the disc away, so the left disc will stay there and having the faction of non return.

Please see the picture as below:

If you want to learn more about the Screw Down Non Return Valves
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Vatac Vango Valves (Wenzhou) Corp is one of the best China steam trap, check valve, knife gate valve, flow control valve, trunnion ball valve, stainless steel check valve, electromagnetic flowmeter, metal expansion joint manufacturers and suppliers, as a company, our professional factory can always produce products at both good quality and price.
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