Water inlet valve diaphragm operation

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SUMMARY

The discussion focuses on the malfunction of a solenoid water inlet valve, specifically when the valve fails to close due to blocked bleed holes. It is established that four out of six bleed holes are obstructed by debris, leading to cyclic surging of water flow when the valve is de-energized. The user requests a section drawing of the valve type in question to better understand the internal operation of the diaphragm and valve mechanism.

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  • Understanding of solenoid valve mechanics
  • Familiarity with diaphragm operation in fluid control systems
  • Knowledge of common causes of valve malfunction
  • Ability to interpret technical diagrams and schematics
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  • Research the operation of solenoid valves and their components
  • Study the impact of debris on valve performance and maintenance strategies
  • Learn about diaphragm design and its role in fluid control
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USEFUL FOR

This discussion is beneficial for mechanical engineers, maintenance technicians, and anyone involved in the design or repair of fluid control systems, particularly those working with solenoid valves.

MetalRocks
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I am investigating the cause for malfunction of a solenoid water inlet valve (when de-energized, the valve fails to close and instead exhibits cyclic surging of water flow). 4 of the 6 bleed holes are blocked with debris, and I have concluded that this is what caused the valve to malfunction However, I need to describe what exactly happens within the valve & diaphragm when bleed holes are blocked.
 
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Please provide a section drawing or a link to the valve type you are using.
 
solenoid valve diaphragm

I don't have a section diagram for this particular valve but http://en.wikipedia.org/wiki/Solenoid_valve has a pretty good general one. I attached 3 photos of the valve & diaphragm with the blocked holes indicated.
 

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  • valve.jpg
    valve.jpg
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  • diaphragm.jpg
    diaphragm.jpg
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  • blocked holes.jpg
    blocked holes.jpg
    46.5 KB · Views: 551

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