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Message: <blockquote data-quote="kbales" data-source="post: 1966887" data-attributes="member: 1140"><p>Check your diaphragm once more.  Take a look at your attached diagram, note that high pressure inlet gas (red) is indeed passing through the orifice, traveling through to the low pressure side (blue).  But because you have a failed diaphragm the gas in the blue area is able to travel to the yellow area (atmopheric pressure).  Could be loose where the diaphragm is connected to the center actuator area too but not likely.</p></blockquote><p></p>