Pneumatic Seals

Symmetrical Seals

Pneumatic seals operate typically in air or other gaseous medium.


Symmetrical Seals are seals whose cross section, when viewed from a cutaway, is symmetrical, i.e., the same on each side of the center line (see below). These seals are for linear and reciprocating dynamic applications.

The symmetrical design allows for interchangeability between rod and piston applications. These type of seals became very popular because of their great advantages for reduced inventory and stock keeping purposes.

If, however, you require the best sealing results and durability, we recommend you select one of our rod or piston seals, depending on your application. These seals have very specific design features which deliver better results than Symmetrical Seals.

Symmetrical Seal Profiles


Find a seal and check instant availability
For your unique or special Pneumatic Seal application, contact our engineers to help you in specifying a seal that’s best for your situation.

At American High Performance Seals, we pride ourselves on manufacturing the most durable pneumatic seals. Utilizing advanced materials designed specifically to offer our customers maximum durability, we manufacture the widest array of seal and material options to meet industry’s challenging fluids, temperatures, surface speeds and pressures.
Most standard and custom-made pneumatic seals are available with a 1-4 day turnaround.

Applications & Industries

AHP Seals Spring-energized PTFE Seals are suitable for service in the following industries:

  • Steel Works
  • Government, Military and Defense
  • Abrasive Substance Pumps and Valves
  • Pharmaceuticals
  • Can and Package Filling Machines
  • Oil-Field Exploration and Production
  • Paint and Solvent Manufacture and Application
  • Adhesives Dispensing Valves and Cylinders Chemical Pumps
  • Cryogenic Liquid Control Components
  • Liquid Handling Swivel Joints
  • Hydraulics
  • Construction Equipment
  • Drilling Equipment
  • Chemical Pumps and Valves
  • Heavy Mobile Equipment
  • Mining
  • Rubber and Plastics
  • Presses
  • Food Processing
  • Space Exploration
  • Marine
  • Tire Production
  • Low Friction
  • Vacuum Service
  • Automotive Plants
  • Pharmaceutical Production
  • Domestic Goods Production
  • Many other applications


Our extensive range of seals are available in a wide variety of sizes and materials. Our materials include: Polyurethane, Nitrile, Viton®, H-Nbr, high-performance Polyurethane, water resistant (hydrolysis resistant) Polyurethane, EPDM, Silicone, FDA compliant materials, Aflas®, Hytrel®, Kalrez®, UHMWPE, Tefzel®, Nylon, Nylatron®, Engineering Plastics, Peek, and a range of proprietary-filled PTFE (PTFE). Many special Duralast™, Permachem™ and Duraloy™ Engineering Plastics and Elastomers were developed to match real-world applications, and on many occasions we have developed a special grade to address a customer’s application difficulty.

American High Performance Seals, Inc.
408 High Tech Dr.• Imperial Business Park•Oakdale, PA 15071
Phone: 412-788-8815 • FAX: 412-788-8816 • Email:
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