Mechanical Seals
Style 78
Tandem Rotating Welded Metal Bellows Cartridge with Pumping Ring
- Cartridges for the critical, toxic and fugitive emission applications where single seals are not acceptable.
- Easy to install cartridge designs.
- Incorporated pumping ring improves cooling of barrier fluid.
- A tangential connection maximizes flow of barrier fluid.
- Can be operated in pressurized or non-pressurized state.
- Static O-rings throughout
- Self-cleaning bellows action
- Fits all ANSI standard and big bore pumps.
- Metric sizes are available.
- Retained faces eliminate troublesome drive pins.
- Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
- Hydraulically balanced design.
- Double Ply available for higher pressure.
- Shrouded face design for added protection.
- API 682 Type B low temperature and Type C high temperature. Tandem Arrangement 2 and 3 available.
Operating Conditions
Max Temp - 400ºF (204ºC)
Max Speed - 4500FPM (22 m/sec)
Max Pressure
Inboard - 300 PSI (20 bar)
Outboard - 250 PSI (17 bar)
Style 76
Tandem Rotating Welded Bellows Cartridge
- Cost effective version of Style 78, designed for applications in which pumping ring or tangential connection are not required.
Operating Conditions
Max Temp - 400ºF (204ºC)
Max Speed - 4500FPM (22 m/sec)
Max Pressure
Inboard - 300 PSI (20 bar)
Outboard - 250 PSI (17 bar)
Differential Pressure - 15-25 PSIG recommended.
Higher pressure is available consult Flex-A-Seal.
