Pneumatic Regulators from Automation Direct

[Nate Laverdure]

Originally Posted by AllenGregoryIV

It means it's a relieving valve, if you were to set it to 60psi and one of your cylinders that is extended is then compressed by an external force that would increase the system pressure downstream of the regulator to > 60psi this regulator will exhaust pressure maintaining the system at 60psi downstream from it.

Originally Posted by Paul Copioli

The relief feature is based on the set pressure so it completely meets the definition of the rule. If you take a large pneumatic cylinder downstream that is extended and then manually push it back, if the regulator did not exhaust then the regulated pressure will go beyond set pressure.

The exhaust feature is required to be legal. That is why many of us already thought the regulator was legal. This q&a answer confirms it is legal.

Yes, I understand that's the desired function of the valve. With only the Nitra docs as a resource, I couldn't convince myself that the valve actually functions that way. (One concern I had is that the Nitra docs don't use the ISO symbol for a relieving regulator, but the Norgen docs do.) Glad to hear that, based on your experience, the device operates the same way that a "pressure relieving regulator" is generally understood to work.

What a relief, huh?