Troubleshooting a Vacuum Degreaser

Q: I’m seeing intermittent discoloration on parts. What could be causing this issue?
A: Chemistry is not selective. If all parts go in equally, it won’t change one or two in the basket. What we should look for are possible concerns upstream. Did these parts sit around in a different soil before they entered the degreasing process? Always check your boil downs and understand how the soils move through the machine; that is a great starting point.
Q: How do I check if my soil is compatible with a vacuum degreasing process?
A: The SDS is a great starting point. Look at your boiling point and what materials are listed in those oils or coolants. You can also do lab-scale distillation processes to see how everything moves.
Q: There appears to be a drip-type discoloration on the surface of a part. How do I correct this?
A: A drip-type discoloration means you have a blind aperture or a deep well in a part, and it looks like something has dripped down the part after cleaning. What we tend to see is that it is a partial cleaning issue. What to look for is how the part is moving in the machine. Are you getting a full rotation? It also comes down to the cycle.