Mechanical Seal Style RB1


Mechanical Seal Style 79


  • Incorporated pumping ring improves the movement – and the cooling effect – of the barrier fluid during operation
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation
  • A tangential connection maximizes the flow of barrier fluid
  • Can be operated in pressurized or non-pressurized state configurations
  • Springs are located out of the product
  • Double balanced inboard face allows for reverse pressures in upset conditions
  • Easy to install cartridge design
  • Fits ANSI standard and big bore pumps
  • Metric sizes are available
  • Can be easily adapted to satisfy high pressure applications or in cases of extreme run out
  • Retained faces eliminate troublesome drive pins
  • Hydraulically balanced design
  • API 682 Type A Tandem Arrangement 2 and 3 available


Operating Conditions

Max Temp:400°F (204°C)
Max Pressure:Inboard – 400 PSI (28 bar)
Outboard – 400 PSI (28 bar)
Differential – 400 PSI (28 bar)
Max Speed:4500 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Flex-A-Seal if in doubt.



Depending on your specific needs and application, Flex-A-Seal can help you identify the ideal products. Contact us to tell us about your needs and request a quote.