Oil return in NH3 plants

[Sinke]

...I support Sergej opinion....

[HallsEngineer]

oil in ammonia systems will go black almost imediately due to carbon left in the oil at manufacturing it is not too detremental. especially if its shell. The newish oil on the block that doesnt go black is petrochem reflo 68a it amazing but a bit more expensive. the company triple treats it to remove all carbon. The other thing to watch in old systems is water due to older engineers not being too bothered about moisture ingress on NH3. I would feel safe putting oil from any part of the system back into the compressor if an oil test has been done by a laboratory and returned without a problem.

[Sinke]

oil in ammonia systems will go black almost imediately due to carbon left in the oil at manufacturing it is not too detremental. especially if its shell. The newish oil on the block that doesnt go black is petrochem reflo 68a it amazing but a bit more expensive. the company triple treats it to remove all carbon. The other thing to watch in old systems is water due to older engineers not being too bothered about moisture ingress on NH3. I would feel safe putting oil from any part of the system back into the compressor if an oil test has been done by a laboratory and returned without a problem.

...Good thinking...
...I see you are on the ground and not in the clouds....