Mechanical Seal Style 79


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 Flexaseal Engineered Seals and Systems, LLC if in doubt.


Quote Request

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