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Printed Circuit Manufacturing Exhaust System Design

December 1, 2014

Q. We are sizing an exhaust system for a Developer unit with an alkaline fume exhaust stream @ 85 °F and a stripper unit with an ethanolamine/aliphatic amine/glycol ether/organic amine @ 130 °F exhaust stream.

Is CPVC suitable or chemical resistant to this exhaust air stream?

Stan Goodwine
Applications Engineer - Rochester, New York USA

December 4, 2014

A. Hello Stan,
I answered your question on Dec 1st but for some reason it didn't post. Yes CPVC is very adequate for developer and alkaline strip conveyorized process. I have seen where PVC leaks over time. You probably already planned on it but an adjustable damper on the exhaust riser will help with processing thin materials in horizontal machines.

Mark Baker
Process Engineer - Phoenix, Arizona USA

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