CSO - Trivia

From: <Paul>
Date: Tue May 29 2001 - 20:51:00 EDT

A younger guy asked me today what "CSO" stood for. Of course, it's "Car Seal Open" (a method of locking a valve in the open position so it cannot be easily tampered-with, say, on the inlet piping of a safety valve), and "CSC" is "Car Seal Closed".

Does anyone know where the term "car seal" comes from?

Paul Received on Tue May 29 20:51:00 2001

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