GMP-II Double Cartridge Seal

High-quality, cost effective balanced seal

The GMP-II double balanced cartridge seal in- corporates a compact design with proven sealing technology. The result is a high-quality, cost-effective seal designed for use on a wide variety of rotary equipment applications.



  • Easy-to-install double cartridge design
  • Balanced configuration runs cooler and lasts longer
  • Cost-effective rebuild kits for easy in-field repair and reduced downtime
  • Fits standard ANSI pumps—no modification required
  • Stationary compression units offer improved face alignment and extended seal life
  • Minimal distance to first obstruction; fits a wide range of pumps
Design Parameters
Minimum Shaft Diameter 1.000" (25.4 mm)
Maximum Shaft Diameter 4.000" (101.6 mm)
Pressure To 300 psi (20 bar)
Vacuum 28" (711 mm) Hg
Temperature To 400ºF (204ºC)
Surface speed To 5,000 fpm (25.4 m/s)
Runout Consult
Axial motion Consult
Spring Configuration Multiple stationary coil springs

Metallurgy 316SS and Alloy 20
Rotary face Silicon carbide (SA)
Stationary face Inboard: chemical grade carbon; tungsten carbide;
Outboard: chemical grade carbon
Springs Hastelloy C
O-rings Fluoroelastomer standard, Aflas or Kalrez offered as alternative

Standard Configuration

GMP-II Illustration

Other Versatile Seals

GMP-I Single Balanced Cartridge Seal

  • Ideal for wide range of rotary equipment
  • Fits all standard ANSI pumps
  • Compact design, easy to install and repair
  • Balanced configuration runs cooler

P/S®-II Flexible Element Cartridge Seal

  • Effectively seals dense and viscous fluids
  • GYLON® sealing elements are chemically resistant and allow dry running
  • Easy in-field repair reduces costly downtime

P/S® and GYLON® are registered trademarks of Garlock.

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Warning - Properties/applications shown throughout this Website are typical. Your specific application should not be undertaken without independent study and evaluation for suitability. For specific application recommendations, consult Beacon Gasket & Seals Co. Failure to select the proper sealing products could result in property damage and/or serious person injury. Performance data published in this Website has been developed from field testing, customer field reports and/or in-house testing. While the utmost care has been used in developing this Website, we assume no responsibility for errors. Specifications subject to change without notice.