Polytetrafluoroethylene (PTFE) has some great properties as a material for seals. It exhibits very low friction against most materials, is unaffected by most chemical solutions, and tolerates an extremely wide range of temperatures. However, its soft consistency makes it susceptible to wear, deformation, and it has low extrusion resistance in comparison to filled PTFE materials.
However, Trelleborg Sealing Solutions, Fort Wayne, Ind., has developed a PTFE-based sealing material that stands up to such key hydraulic sealing characteristics as friction, wear, and high pressure. Testing has also shown that Trelleborg’s Turcon M12 is compatible with virtually all media. Furthermore, the material offers long seal life, a low cost-to-performance ratio, and a wide operating window for temperature, pressure, and velocity.
Tests of a newly developed PTFE-based seal material show it holds potential for low friction and long life under a wide range of conditions in hydraulic cylinders.
“Turcon M12 has exceeded expectations, and, in our opinion, no other material can give such universally exceptional performance,” says Nancy Getz, product manager for Trelleborg. “On almost every parameter it is better than previously recommended compounds — sometimes very significantly — or was at least equal to them. Turcon M12 can fit virtually all hydraulic applications and meet a more universal range of applications.”
Turcon is the Trelleborg Sealing Solutions brand of proprietary PTFE sealing materials. More specifically, Turcon M12 matrix is mediumfilled with a complex mix of nonabrasive mineral fibers combined with additives. It was developed by Trelleborg Sealing Solutions, Helsingr, Denmark, and tested in R&D labs in Stuttgart, Germany, and Fort Wayne.
Before its launch, Turcon M12 underwent extensive testing to compare it to best-in-class compounds for important sealing characteristics within hydraulic applications.
Performance at different pressures and speeds
Mineral oil compatibility
Environmentally-friendly hydraulic fluid compatibility
Wear test — wind turbine pitch cylinder specification
High-pressure wear test
Wear test — short stroke, high frequency