top of page


Single Rotating
Multi-Spring Cartridge Mechanical Seal with Circulation Gland

Mechanical Seal Style RS1

Strategic versatility

With common sleeves, glands, and seal parts for all designs, cartridge assembly is quick and fail-safe. Plus, it's easy to modify face material, metallurgy and elastomers. 

Single Rotating Multi-Spring Cartridge Mechanical Seal with Circulation Gland - Style RS1


  • Part of Flexaseal’s integrated/platform single cartridge seal design;

  • Patented (Patent Number US 7,979,986) Plunger-Lock drive;

  • Easy cartridge installation;

  • Sleeve is isolated from product;

  • Stationary bellows design – maximizes face alignment;

  • Hydraulically balanced design;

  • Even face loading;

  • No dynamic elastomers;

  • Only two static O-rings – cost savings are substantial when perfluorelastomer are required;

  • Flush position maximizes face cooling;

  • Shrouded rotary seal ring for maximum face protection and reliable start-up;

  • Uniform 360° transfer of torque to the primary rotating face;

  • No pins to break or hang up;

  • Fits ANSI standard and big bore pumps;

  • Faces, metallurgies and elastomers are easily upgradeable;

  • Faces designed for optimum heat dissipation;

  • Metric sizes are available.

RS3 with Circulation, Vent & Drain Gland

  • All the benefits of the SB1 design plus vent and drain gland with throttle bushing

  • Pipe connections are made to different sizes to assure that correct piping plans are employed

  • Cost-effective 'upgrade'


Operating Conditions

Max Temp:  400°F (204°C)

Max Pressure:  300 PSI (20 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 Specialised Seals if in doubt.

bottom of page