American High Performance Seals

Hudraulic & Fluid Seals

Buffer Seals

For linear and reciprocating dynamic sealing applications

High Pressure - Ultra High Pressure Buffer Seals

Typical rod seal installation Rod seal profile view
Installed buffer seal example Buffer seal example

Buffer seals are typically unidirectional rod seals that work in conjunction with the primary rod seal to absorb pressure spikes
...More Info

Our Buffer Seals are classified as follows:

High-Pressure Buffer Seals (3,000psi – 5,000psi*)

S92 S9 F2B  

Ultra-High-Pressure Buffer Seals (4,000psi – 28,500psi*)

Single-acting/unidirectional (capable of sealing pressure from one side)

Sealing ultra-high pressures can be achieved by replacing the low friction PTFE/Teflon® sealing element with high strength polymer materials.

S92 S9    

Contact us, request more information or call 1-800-283-7140 for immediate answers to your questions.

Why American High Performance Seals?
...More Info

Availability:  Most standard or non-standard and application-specific designed buffer seals, in inch or metric sizes, are available with a 1-4 day turnaround.

Seal Materials: The selection of the best material has a critical impact on achieving the best sealing performance. Our comprehensive range of leading edge standard-, high- and low-temperature materials include: High-performance Polyurethane (P101), Nitrile, Viton®, H-Nbr, PTFE (Teflon®), filled PTFE, Aflas®, Hytrel®, Kalrez®, EPDM, Silicone, FDA compliant materials, Nylon, Nylatron®, POM, UHMWPE, Tefzel®, and Peek, along with our proprietary specialized materials. More Info on Materials

For your unique or special buffer seal application, please contact our engineers to help you in specifying a seal that’s best for your situation.

*Pressure values are guidelines that depend on seal material, seal configuration, seal housing design, fluid or medium, operating temperatures, pressures, surface speed, and working environment. For maximum seal life expectancy, do not operate your seal beyond 75% of its operating limits.
For pressures exceeding 8000psi, please consult our engineers at or call 1-800-283-7140 for advice.

Applications & Industries

AHPSeal's Buffer Seals are currently in successful 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

American High Performance Seals assumes no obligation or liability for any advice furnished, or results obtained with respect to these products. All such advice is given and accepted at the buyer’s risk. This information, based on our experience, is offered as part of our service to customers. It is intended for use by persons having technical skill, at their own discretion and risk. We do not guarantee favorable results, and we assume no liability in connection with its use.



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

Copyright (c) American High Performance Seals - All Rights Reserved