Mechaflex R.S.T. P818

Robust Single Cartridge Seal

The P818 Series is a robust single cartridge seal for slurry application intended to provide an excellent sealing performance for pumps. As one of the members of RST Mechanical Seals, P818 is designed to operate in a wide range of process fluids.
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R.S.T Series

The R.S.T Mechanical seals are known for its design which were made using ProEight’s in-house FEA programs, SIGMA-FEA and CELC-FEA combined with ANSYS

These software programs analyze combined seal distortion due to pressure, temperature, stress distortion and face loadings. Steady-state and transient conditions coupled with various possible sealing environments gave a clear overview of the mechanical seals’ performance.

Design Features

  • Spring Protected Design
  • Uniform-load Multispring compression unit
  • Reversible Seal Head
  • Emission Restrictive Throttle Bushing
  • Bolted Auxiliary Gland(Subject to design requirements & compatibility)


-30°C to 205°C / -20°F to 400°F
Up to 21 bar g/300 psig
Up to 25 m/s / 5000 fpm

Seal Application

  • ANSI B73.1M and DIN 24960 Pump-Compliant
  • Centrifugal Heavy Duty Pumps
  • Centrifugal API Process Pumps
  • Centrifugal General Purpose Pumps

Industrial Application

Oil & Gas Production
Petroleum Refining
Pulp & Paper
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