subsea ball valve vs gate valve

[suraiya]

Between ball valve and gate valve, which one will be a better valve for isolation on a subsea manifold header (from an oil well)?

 

[BigInch]

Use a quick opening 1/4 turn ball. Don't make any more problems for divers or ROVs than absolutely necessary.

BigInch-born in the trenches.

http://virtualpipeline.spaces.msn.com

 

[zdas04]

To expand on this good advice, a 10-inch rising stem gate valve takes over 100 turns to go from fully open to fully shut (or vice versa). There are few things field guys hate more.

David