Water inlet valve diaphragm operation

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The discussion focuses on the malfunction of a solenoid water inlet valve, specifically its failure to close when de-energized, resulting in cyclic surging of water flow. The issue is attributed to four out of six bleed holes being blocked with debris, leading to the valve's malfunction. The user seeks a detailed explanation of the internal operation of the valve and diaphragm when these bleed holes are obstructed. A general section diagram of solenoid valves is suggested as a reference, though specific diagrams for the user's valve are not available. Understanding the impact of blocked bleed holes is crucial for diagnosing and resolving the valve's operational issues.
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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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