Machine Design

Polymer Seals

High-performance polymer seals withstand high-viscosity, abrasive fluids, and high cycling velocities inherent in cold-adhesive dispensing applications.

The low-cost seals are reportedly field proven over millions of cycles in adhesive-dispensing valves. The seals are made of blended PTFE or other engineered polymers, and use pressure-energized, canted-coil spring technology. This provides near-constant contact force over a wide range of working deflections and allows wide tolerances between mating parts. Coupling PTFE's wear-resistant/lowfriction/chemical compatibility properties with the advantages of canted-coil spring technology lets the products meet demanding requirements. In addition, a metal locking ring pressed into the housing of each seal reduces diametrical shrinkage.

Bal Seal Engineering, 19650 Pauling, Lake Forest, CA 92610, (949) 460-2100,

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.