PSI Model C Coated Casing Isolators are used to electrically separate carrier pipes from the casings through which they pass.

PSI polyvinyl chloride coated (PVC) casing isolators are often selected due to their strength and excellent corrosion resistance. An extremely tough and durable heat-fused PVC coating is offered on steel casing isolators 4" and larger, with 12" wide bands. The cold-formed steel casing isolator band, complete with runner studs installed, is vapor degreased, primed, heated and fusion coated with plastic, providing a minimum .010" (0.254 mm) thick coating over the entire band and runner studs. A post-cured cycle strengthens the bond and provides an even more uniform coating. Polyvinyl chloride is available as standard. Other heat fused plastic coatings are also available for custom orders and applications.

Runners are attached with 3/8" diameter studs, which are fusion-welded to the band before it is PVC coated. They are recessed far below the wearing surface of the runner. After the runner is anchored to the band, the stud counter-bore is filled to assure a water-tight seal for the stud and the lock fastener.