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check valve and non return valve

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Suresh John

> What is the difference between check valve and non return valve

Both are doing the function of avoiding reverse flow. If both sides of a valve is same phase, say liquid, then it is Check valve. if one is a gas vessel and inlet is liquid ,the valve is NRV and must be horizontal (for two phase its NRV).
 
V

VPB

NRV is used in vertical location where as check valve is used in horizontal location. Function is same for both.

>> What is the difference between check valve and non return valve

> Both are doing the function of avoiding reverse flow. If
> both sides of a valve is same phase, say liquid, then it is
> Check valve. if one is a gas vessel and inlet is liquid ,the
> valve is NRV and must be horizontal (for two phase its NRV).
 
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