Placing a Tank after a solenoid valve

[gpetilli]

Originally Posted by Al Skierkiewicz

I have to ask the OP to be sure...
OP, You are using a valve to charge a tank and operate a cylinder in the same circuit? Is that what I am reading?

Madison,
In looking at your drawing, I do not see how the stored pressure can be vented immediately by opening the manually operated valve. Should there be a failure in either of the regulators, opening the valve leaves high pressure air still in the tanks. While that may have passed inspection at your events in 2012, I do not think it was legal in 2012 or now.

Please ask the question of the Q&A.

I too am not an expert, but I believe the standard FRC solenoids use a supply "pilot" which means that if the input air pressure goes away (think manual dump) then the solenoid opens allowing the output air to back through the output to the input. This works only if there are no check values in the system and does not depend on any electrical signals. We have had issues in the past that if the working pressure is too low, there is not enough energy to "engage the pilot" and the solenoid does not activate. If I am correct, then this would allow the low pressure storage tank to vent when the manual release is opened.