I Calculating Hydrostatic Force on valve cavity in a Solenoid Valve

AI Thread Summary
The maximum static pressure in a solenoid valve will be lower than the inlet pressure while flowing. As flow transitions from port A to port B, pressure drops due to restrictions near the valve core. The pressure in the valve cavity varies with the valve's opening degree, and it is not constant even when fully open due to area changes. The force exerted on the valve walls fluctuates with the varying static pressure along the flow path. For accurate calculations, the maximum static pressure occurs at full open flow near the inlet.
jackmrrabbit
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By any chance, can someone help me understand how one would calculate force acting on the walls of the valve cavity? Is pressure usually assumed to be constant? Assuming the fluid is an incompressible fluid. Thank you.
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The maximum static pressure it will have while flowing will be less than the static pressure at the inlet. While flow is passing from port A to port B the pressure will drop through the restriction near the "valve core bottom".
 
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Welcome!
Pressure in the valve cavity should change according to the degree of closing-opening of the valve.
 
Lnewqban said:
Welcome!
Pressure in the valve cavity should change according to the degree of closing-opening of the valve.
If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?
 
jackmrrabbit said:
If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?
Would force be constant?
 
jackmrrabbit said:
If the valve was set to the open position, pressure would still not be constant throughout the path from A to B due to area changes right?
If there is flow when the valve is set to full open, then the pressure will not be constant throughout the path from A to B.
 
jackmrrabbit said:
Would force be constant?
The force on the walls will vary as static pressure varies along the path of the valve.
As the valve closes, and flow is reduced, the static pressure becomes more uniform along the path, but its value is lower.
For your calculation, maximum static pressure should happen at full open flow and closer to the inlet.
 

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