Tec-Mar Industries - Industrial Equipment, Shaft Seal, Filtration, Access, Loading, Emergency Shower Equipment

Flex-A-Seal Mechanical Seals:      Dual Cartridge Seals


Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Styles 73 & 75 Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Style 76 Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Style 78

Dual Cartridge Seals

Styles 73 & 75 - Double cartridge seals for environmental protection.

  • Flex-A-Seal is a respected leader in the design and manufacture of cartridge seals for critical toxic and fugitive emission applications where single seals are not acceptable.
  • The simple idea of a second layer of protection provides the level of assurance that the world has come to expect.
  • The Style 73 offers the advantages of an inboard stationary metal bellows design.
  • The Style 75 offers the efficiency and economy of springs isolated from the product.
  • We have concentrated on the customers need for easy installation and low maintenance that can be operated in a pressurized or non-pressurized state.
  • These designs fit pumps with standard and enlarged bores without modification.
  • Retained faces eliminate the need for troublesome drive pins.
  • Unlike traditional cup point set screws, which are commonly used in the rotary unit, Flex-A-Seal replaces them with stainless steel drive lugs, resulting in a five-fold increase in torque transmission strength.
  • In addition, there are no set screws to back out and the possibility of sleeve distortion is eliminated while the entire drive mechanism is out of the product.
  • Both cartridge seal designs are hydraulically balanced and the shrouded face provides additional protection.
  • Operating Conditions - Max. Temp 400F (204C), Max. Pressure 300 PSI (20 bar), Max. Speed 3600 FPM (18 m/sec).

Style 76 - Tandem rotating welded bellows cartridge.

  • Cartridges for the critical, toxic, and fugitive emission applications where single seals are not acceptable.
  • Can be operated in pressurized or non-pressurized state.
  • Static O-rings throughout.
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
  • Self-cleaning bellows action.
  • Fits standard pumps without modification.
  • Large inlet port and smaller outlet port enhances flow.
  • Easy to install cartridge design.
  • Retained faces.
  • Hydraulically balanced.
  • Shrouded face design.
  • Operating Conditions - Max. temp 400F (204C), Max. Speed 4500FPM (22 m/sec), Max. Pressure Inboard 300 PSI (20 bar), Outboard 250 PSI (17 bar).

Style 78 - Tandem rotating welded bellows cartridge with pumping ring.

  • Cartridges for the critical, toxic, and fugitive emission applications where single seals are not acceptable.
  • Easy to install cartridge designs.
  • Incorporated pumping ring improves cooling of barrier fluid.
  • Tangential connections maximizes flow of barrier fluid.
  • Can be operated in pressurized or non-pressurized state.
  • Static O-rings throughout.
  • Self-cleaning bellows action.
  • Fits standard pumps without modification.
  • Large inlet port and smaller outlet port enhances flow of barrier fluid.
  • Retained faces eliminate troublesome drive pins.
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
  • Hydraulically balanced design.
  • Shrouded face design for added protection.
  • Operating Conditions - Max. temp 400F (204C), Max. Speed 4500FPM (22 m/sec), Max. Pressure Inboard 300 PSI (20 bar), Outboard 250 PSI (17 bar).


Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Style 79 Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Style 72 Flex-A-Seal Mechanical Seals - Dual Cartridge Seals - Style 74

Style 79 - Stationary tandem multi-spring cartridge.

  • Cartridges for the critical, toxic, and fugitive emission applications where single seals are not acceptable.
  • Incorporated pumping ring improves cooling of barrier fluid.
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
  • Tangential connections maximizes flow of barrier fluid.
  • Can be operated in pressurized or non-pressurized state.
  • Springs are out of the product.
  • Double balanced inboard face allows for reverse pressures in upset conditions.
  • Easy-to-install cartridge design.
  • Fits standard pumps without modification.
  • Large inlet port and smaller outlet port enhances flow of barrier fluid.
  • Stationary design.
  • Can be easily adapted to satisfy high pressure applications or extreme runout.
  • Designs for most challenging mixer, agitator, and reactor applications.
  • Retained faces eliminate troublesome drive pins.
  • Hydraulically balanced design.
  • Shrouded face design for added protection.
  • Operating Conditions - Max. Temp 400F (204C), Speed 4500 FPM (22 m/sec), Max. Pressure Inboard 400 PSI (27 bar), Outboard 400 PSI (27 bar).

Style 72 - Tandem multi-spring inboard / welded bellows.

  • Cartridges for the critical, toxic, and fugitive emission applications where single seals are not acceptable.
  • Rotating design.
  • Double balanced inboard face allows for reverse pressures in upset conditions.
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
  • Multi-spring design inboard.
  • Springs are isolated from the product.
  • Outboard bellows design allows for more efficient cooling of barrier fluid.
  • Operating Conditions: Max. Temp 400F (204C), Max. Speed 4500FPM (22 m/sec).
  • Max. Pressure: Inboard 300 PSI (20 bar), Outboard 250 PSI (17 bar).

Style 74 - Tandem multi-spring inboard / welded bellows outboard cartridge with pumping ring.

  • Cartridges for the critical, toxic, and fugitive emission applications where single seals are not acceptable.
  • Tandem design maintains product and barrier fluid on O.D. of both seals for increased safety and heat dissipation.
  • Rotating design.
  • Double balanced inboard face allows for reverse pressures in upset conditions.
  • Unique welded canister ensures positive torque transfer from shaft.
  • Multi-spring design inboard.
  • Smooth profile reduces product buildup in stuffing box.
  • Springs are isolated from the product.
  • Cartridge design assures easy installation.
  • Pumping ring for improved cooling of barrier fluid.
  • Hydraulically balanced design.
  • Retained seal faces eliminate troublesome drive pins.
  • Tangential connections maximizes flow of barrier fluid.
  • Shrouded face design for added protection.
  • Fits standard pumps without modification.
  • Unique outboard bellows design eliminates hysteresis, allows for lighter face loads, minimizes heat generation and power consumption.
  • Outboard bellows design allows for more efficient cooling of barrier fluid.
  • Large inlet port and smaller outlet port enhances flow of barrier fluid.
  • Repair kits available.
  • Operating Conditions: Max. Temp 400F (204C), Max. Speed 4500FPM (22 m/sec).
  • Max. Pressure: Inboard 300 PSI (20 bar), Outboard 250 PSI (17 bar).



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