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TAC 20 Cartridge Mechanical Seal

TAC 20 Cartridge Seal

The TAC-20 is a full cartridge design. It is a single stationary multi-spring seal with a four-bolt stuffing box arrangement. The TAC-20 has the same internals as the TAC-11 but includes the four-bolt arrangement as well as a flush port. The addition of the flush port allows for API flush plans such as a plan 11, 13, 21, 31, 32, and 41. All of AR Thomson Groups ANSI mechanical seals are balanced seals and feature monolithic faces, thermal management technology, and stationary spring designs.

Thomson Advanced Cartridge Thermal Management Technology

Monolithic faces have proven to be more resistant to distortion from higher temperature or pressure applications. The thermal management technology removes heat from the faces and distributes it to other areas of the seal and stuffing box. This removal of the heat allows for some intermittent flow of liquid between the faces (dry running). Stationary spring designs are self-aligning and allow for some alignment issues and improper installation.

Performance Parameters

Performance limits depend on many factors, including but not limited to: Equipment condition, correct installation and commissioning, maintenance of support systems, pumped media and seal materials. If in doubt please consult A.R. Thomson Group mechanical seal department.

Cartridge Seal Specifications

Retrofits virtually all pumps such as: Goulds, Durco, Bingham, Sulzer, Ahlstrom, Worthington, Nash, Hayward-Gordon, Moyno, Wemco, Canada Pump, Viking, Weir, Cornell, A-C, Taco, IDP, etc.
The TAC-20 has a maximum pressure rating of 300 psig (21 bar), a temperature range of -40°F to 400°F (-40°C to 204°C), and a maximum shaft speed of 5000 fpm (25 m/s).


  • Metallurgy; 316L, Alloy C-276, Titanium.
  • Elastomer; Viton, EPDM, Nitrile, Aflas, Perfluro Elastomers.
  • Faces; Silicon Carbide, Tungsten Carbide, Resin Carbon, Antimony Carbon.

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Specification Sheet

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