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doubleblockandbleedvalves havecommonlybeenusedforprimaryandsecondarytightshutoff,inanattempttoprovideandensuresystem intergity.Historically,systemintegritywouldbeachievedthroughtheuseoftwoindividualisolationvalves,a spoolpieceandableedvalvehadthedisadvantagesofextensivecostandweightandalsoincreasestheriskof emissionsdueto...
Forged Steel Double Block and Bleed DBB Ball Valve with Flange or Thread Ends Conform to API 6D, ASME B16.34, They are tested according to API 598, and marked as per MSS SP-25. 1. Construction is as follows: Construction is as follows: - Full Port - Split body - Bo...