Car sealed valve - origin of term ? 1

[FrankH2]

As I understand, a "car sealed" valve is "locked" in position - either open or closed.
Sometimes plastic strips are used, could also be more substantial locking device.
-Does anybody know the origins of this weird expression "car seal" ?
TIA

 

[btrueblood]

I'm pretty sure it refers to products being shipped on freight cars.

 

[Montemayor]

That's exactly where the term came from. At least that's what I learned out in the plants in 1961. All railroad freight cars used (& I believe still do) to used a metal sealing strip around the handles of the sliding doors. The rupture or "breaking" signaled that the car had been opened and probably accessed.

Chemical process plants and oil refineries here in the Texas Gulf Coast have been using the term since before that time.



Art Montemayor
Spring, TX

 

[quark]

Though it is explained above, I am giving the reference of an old thread just to show the versatility of this website

thread798-92605

 

[FrankH2]

Thanks for the informative and very precise answers !
Prior to posting the Q here, I had used Google for "car sealed" or "carr sealed" valve - it turns out that "carseal" is a much better search term.
Shows the potency of Google - but also the superiority of asking humans.
Frank
Denmark