Pneumatic Seals may be used for rotary and reciprocating motion. Common pneumatic seals include: rod seals, piston seals, symmetrical seals, V-Rings, wipers, wear rings, static seals, back-up rings, o-rings etc. Pneumatic seals can be single or double acting. Single acting pneumatic seals are used for one axial direction only. Double acting pneumatic seals are used in both directions for a reciprocating motion.
Pneumatic seals can be made of a variety of materials: Polyurethane, Nitrile, Viton, Silicone, EPDM and PTFE.