+1 vote
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Ball valve opening against high differential pressure

asked Apr 4, 2014 in Operations by Dan01 (1,560 points)
Is ball valve opening against high differential pressure ok?

1 Answer

+1 vote
answered Apr 4, 2014 by odadmin (21,030 points)

Generally, it’s not good practice to open ball valves (especially soft seated designs) against high differential pressure.

For the FMC valves, as there is a risk of damaging valves seats, I recomend one of the recommendations below is followed:

  • adding a warning to the relevant operating manuals
  • adding a car seal to make sure the valve is not inadvertently operated
  • adding a warning sign on the valve body

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