Pneumatic seals restrict the release or entrance of pressurized gasses within a pneumatic valve or action such as a cylinder. These seals are typically designed for much lower pressure than is used in hydraulics. Common fixed systems are designed to use compressed atmospheric air that can be easily refreshed but pneumatics in other systems can use nitrogen, pure oxygen and carbon –dioxide. Rubber seals designed for use in these systems can be single acting for use in a single axial direction, or double acting for use in both directions of a reciprocating application. Southern Michigan Rubber, Inc. can help you with the highest quality seals for your product so contact us today for pricing or any questions you may have.