The threaded end connects to the pressure tank and the flex/push on end connects to the pipe between the compressor and the tank but is before a one way valve see picture.

The leak came about when I changed the seals on the sight glass; a rather complex task and, in my case, expensive too (in that I broke 2 sight glasses in the process).

Dresser Consolidated is one of few safety valve suppliers in the world that can comply with the full scope of products and stringent certifications required for the nuclear power industry.

Safety valve is the process equipment and piping overpressure protection device INS630b

A pressure relief valve that is actuated at a set temperture. ie the device remains closed until it reaches 150F at wich point pressure is released.

Most of our safety valve vent directly into a flare header making it difficult to determine if one has lifted. One way is to put a bursting disc on the discharge side of the safety valve.

Bmoorthy, as implied by mr Anegri if you read both the 'Shell spec 77/312' and 'TA LUFT' both require testing for extrenal leakage only.

what codes talk about the required information in the Maintenance calibration Name plate?