Mechaflex R.S.T

Heavy Duty Single Cartridge Seal

Incorporates Simplistic Design and Patented Flexical to Improve Seal Robustness for Various Sealing Applications
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R.S.T Series

R.S.T Series is compact, built with simplicity in design and incorporates the innovative sealing unit, FLEXICAL.

MECHAFLEX is proved to be yet another great innovation through ProEight’s extensive research and development, incorporating the patented, state-of-the-art sealing unit; the FLEXICAL. Field performance has proven that MECHAFLEX can successfully perform in most problematic and difficult pumps with demanding environments, providing the best sealing solution.

Design Features

  • Flexical compression unit
    • High flexibility
    • Excellent heat dissipation
    • Advanced material technology
    • High reliability factor
    • Resistant in slurry application
  • Dual balance seal face design
  • Flow assist


-40°C to 310°C/-40°F to 590°F
Vacuum to 100 Bar G/2,540 psig
Sliding Speeds
Up to 55 m/s / 11,000 fpm
Seals Size
1.375” to 4.875”
(For seal size that is not listed in the standard range, kindly consult with ProEight Engineering)

Seal Application

  • Available for seal arrangement 1, 2, & 3
  • Low to high pressure application
  • Upstream & downstream (crude oil, condensate, H2S, etc.)
  • Process fluid with high suspended particles (slurry) and high viscosity

Industrial Application

Oil & Gas Production
Oil & Gas Production
Power generation
Mining & minerals
Water & waste water management
Pulp & paper processing
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