Bal Seal Engineering’s new polymer seals can withstand the harsh conditions – high viscosity, abrasive fluids and high cycling velocities – inherent in cold adhesive dispensing applications. These seals are field-proven to provide sealing in adhesive dispensing valves. Bal Seal polymer seals are made of formulated, blended PTFE or other engineered polymer compounds, and employ the company’s pressure-energised canted-coil spring technology. This patented technology enables near-constant contact force over a wide range of working deflection and allows wide tolerances between mating parts. Coupling PTFE’s uses wear-resistant/low-friction/chemical compatibility properties with the advantages of canted-coil spring technology. In addition, a patented metal locking ring pressed into the housing of each Bal Seal polymer seal helps reduce diametrical seal shrinkage. Besides adhesive dispensing valves, Bal Seal Engineering’s polymer seals are suitable in other valve types including gate, ball, and needle valves.