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|Regulators

What is the M5 tapped hole at the bottom left of the digital pressure display on ITV2000/3000 series electro-pneumatic regulators for?: It is an exhaust port of the internal solenoid valve. Leave it open to the atmosphere. If a plug or gauge is installed, it will not operate properly. (It is an M3 tapped hole for ITV1000 series electro-pneumatic regulators.)