Secondary seals are used on casing head spools and between bottom of tubing head spool and casing.
PE secondary seal is inserted in the bottom bowl of a casing spool or tubing spool and retained with a snap wire. The seal is energized when the spool is installed over the casing stub and the flange connection is made up. It is available in standard API casing sizes, as well as nonstandard casing sizes, and is built to provide safe, dependable service in pressure applications through 5000 psi.
"P" secondary seal
"EBS" Reducer Bushing
The "EBS" reducer busing is a secondary seal that uses self-energized elastomer ring to seal the casing head spools and tubing head spools, the bushing is rated up to 10000 psi.
