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Is there a valve that can be set to open to let hot gas out at a certain pressure, and then close once the pressure drops back down?
Edit: Sorry, I'm looking for a valve that will let the pressure build up to a high point, then open to release the gas until the pressure is released, then close again until the system builds up another cycle of high pressure. For example, I pump a cool gas into a closed space and heat it up to 500 degrees, at which point this valve opens up and releases the pressurized gas until the pressure is reduced to the original pressure of the cool input gas, then closes until the next cycle of air reaches 500 degrees.
Edit: Sorry, I'm looking for a valve that will let the pressure build up to a high point, then open to release the gas until the pressure is released, then close again until the system builds up another cycle of high pressure. For example, I pump a cool gas into a closed space and heat it up to 500 degrees, at which point this valve opens up and releases the pressurized gas until the pressure is reduced to the original pressure of the cool input gas, then closes until the next cycle of air reaches 500 degrees.
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