Pressure drop in a solenoid valve

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khalilmaalej
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Registration: 31/03/12, 12:05

Pressure drop in a solenoid valve




by khalilmaalej » 12/04/12, 16:13

Hello, I'm looking for the pressure drop in a solenoid valve

Thank you
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Gaston
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by Gaston » 12/04/12, 16:35

Hello,

It depends

You're welcome
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Philippe Schutt
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by Philippe Schutt » 12/04/12, 16:52

In principle it is indicated. see kv or kvs.
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dedeleco
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by dedeleco » 12/04/12, 23:15

The closed valve has an infinite pressure drop !!
The wide open valve has a low pressure drop, of the order of magnitude of a few cm of pipe to the diameter of the valve passage opening !!
Between these extremes the pressure drop varies gradually, depending on its position, fixed by the regulation acting on the solenoid valve.
If no luck, if a low flow is necessary, and the valve almost closed, the pressure drop will be very strong !!!

So you have to know the average position of the solenoid valve, which will cause a large pressure drop if by design error the wide open flow is excessive, like 10 or 100 times more than necessary, then the pressure drop will be 10 or 100 times that of the valve wide open !!!

La Palisse could not have said it better. !!!
http://fr.wikipedia.org/wiki/Lapalissade
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Grelinette
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by Grelinette » 15/04/12, 12:52

To put it simply: you measure your pressure (and your flow) at the valve outlet, then after the solenoid valve ...

For example, in irrigation it is estimated that there is 1 bar pressure drop per 100 m of pipe, but it depends on the pipe (diameter, material, whether it is straight or bending, on flat ground, etc.).

The head losses (and flow rates) announced are often theoretical, the best is to check.

Edit: even simpler: you make a vertical water jet with your hose at the outlet of the tap, then at the outlet of the EV, and you see the difference in height!
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