Different operating requirements require different designs. The company's product development and application technology are bundled into one unit to provide the best possible support for customers and to offer the best individual solution - whether to adapt an existing product or to develop a new design. Based on many years of experience and expertise, GOETZE® has developed a robust analysis tool for the design of face seals.

This tool makes it possible to evaluate new sealing geometries by simulation, or to find solutions for existing problems with customer applications. The virtual design is then validated by a series of laboratory and test bench trials, which include preload, spring characteristics, temperature and wear parameters. Special requirement tests, such as long-term and mud box tests, supplement validation.

Federal-Mogul Powertrain’s most recent face seal development is the HSL seal, an evolution and special form of the company’s proven square bore seal 76.95 H. The HSL seal uses a unique and patented design for the elastomeric part of the seal with an integral dirt exclusion lip and heavy-duty spin protection. These features improve the seal performance significantly under extreme mud packing conditions. This keeps the seal fully flexible and leads to reduced leakage and extended service life.

Product Description

Mechanical face seal type 76.95 consists of two metallic angular seal rings with identical geometrical contours, assembled with trapezoid elastomer parts positioned against the housing bore. Requires slightly less installation space than standard designs.

  • Material: Duronit or Coronit cast iron
  • Seal elastomer(s) used in standard seals: NBR 50, NBR 60, HNBR 50, HNBR 60, HNBR 60CF, HNBR 60SO, FPM 55
  • Seal Weight Range (standard parts): 135 to 2860 grams
  • Seal Ring Outer Ø Range (standard parts): 62.5 to 353 mm
  • Seal Ring Inner Ø Range (standard parts): 45 to 319 mm
  • Seal Set Height Range (standard parts): 17 to 40 mm
  • Detailed Seal and Housing Dimensions: see reference brochure
  • Many standard and custom sizes available


Mechanical face seals from Tenneco's GOETZE® brand are found wherever the going gets really tough: in heavy technical equipment such as construction machinery, conveyors, mining machinery, concrete and cement mixers, tunnel boring and agricultural equipment. Our face seals ensure lubricant retention within wheel hubs and axles, track rollers, transmissions and many more components.