GMP-II Double Cartridge Seals

  • Style/Model: GMP-II
  • ABS Certified: No
  • ADI/TSE Free: No
  • API 589 Compliant: No
  • API607Compliant: No
  • API622Compliant: No
  • DFARS Compliant: No
  • FDA Compliant: No
  • Fire Safe: No
  • KTW Compliant: No
  • NSF® 61 Certified: No
  • REACH Compliant: No
  • RoHS Compliant: No
  • Shipping Weight: 0 lbs
  • USDA Approved: No
  • USP VI 661 Compliant: No
  • USP VI 87 Compliant: No
  • USP VI 88 Compliant: No

High-quality, cost-effective, balanced seal

A double cartridge mounted face seal which is both stationary and balanced, which can be used in higher pressures and at higher speeds than unbalanced alternatives. it can be used with a pressurized barrier fluid (double seal applications) or unpressurized buffer fluid (tandem applications). The GMP-II seal is available in a wide range of materials to suit the application requirements.

  • Minimum Shaft Diameter: 1.000 in. / 25.4 mm
  • Maximum Shaft Diameter: 4.000 in. / 101.6 mm
  • Maximum Pressure: 300 psi / 20 bar
  • Maximum Vacuum: 28 in Hg / 711 mm Hg
  • Maximum Temperature: 400°F / 204°C
  • Maximum Surface Speed: 5000 fpm / 25.4 m/s
  • Spring Configuration: Multiple stationary coil springs


  • Metallurgy: 316SS and Alloy 20
  • Rotary face: Silicon carbide (SA)
  • Inboard Stationary Faces: Chemical grade carbon; tungsten carbide
  • Outboard Stationary Faces: Chemical grade carbon
  • Springs: Hastelloy C®
  • O-rings: Fluoroelastomer standard (Aflas® and Kalrez® offered as alternatives)
  • Other materials available. Consult Garlock.

Hastelloy C is a registered trademark of Haynes International. Aflas is a trademark of Asahi Glass Company. Kalrez is a registered trademark of DuPont.

  • Overview

Features and Benefits:

  • 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

Industries Served:

  • Chemical Processing
  • Pulp and Paper
  • Mining
  • Power Generation