The General Rubber Teflon lined joints are suitable not only for pressure applications but also for vacuum service to 26" Hg (full vacuum). The liners are locked to the body of the joint and will not separate during the most severe service.
Teflon lined joints are used extensively by the pulp & paper industry and easily handle white, green and black liquors. They are ideal for use in the bleach plant chlorination and caustic extraction stages. Teflon lined joints are suitable against the full PH range and successfully handle almost any application in chemical plants within the pressure/temperature rating of the expansion joints.
All flanges are drilled to ANSI B16.1; B16.5 standard dimensions and no gaskets are required. The Teflon liner covers the face of the expansion joint flange to the inside of the bolt holes and acts as an ideal gasket when mated against full face or raised face flanges. Check carefully to be sure the pipe opening is the same dimension as the expansion joint face to face length. If the expansion joint is elongated during installation, the movement capability will be reduced and it will also be more difficult to effect a seal at the flanges. Make sure bolts are inserted with the head against the backup retaining rings and tighten until the rubber flange bulges slightly between the retaining rings and mating flange. Retighten periodically. The piping should be properly achored and it is recommended that control units be used to prevent excessive elongation.
General Rubber Corp., 11A Empire Blvd., South Hackensack, NJ 07606-1805. Tel: 201-6414700; Fax: 201-641-4710.