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Impact on pressure and flow from spool construction 1

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Startto

Mechanical
Dec 16, 2019
16
EE
sp_yrcvud.jpg

Hii,
Attached picture is a spool in valve assembly.
How can we calculate the pressure and flow differences occurring due to the construction of spool.
 
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Is this meant to be a precision flow or pressure control valve? If so, you need to pay attention to machined edges of the orifices. A slight change in the break of an edge and the flow/pressure characteristics will change quite a bit.
 
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