CPI Compression

Packing Rings and Wiper Rings

Tight seal and optimal pressure—no matter the application.

Packing Rings

Using a wide range of metallic and non-metallic materials and a variety of designs we offer a large selection of packing rings designed for unidirectional and bidirectional sealing, low-pressure vent and gas purge sealing.

Did you know?

Adam Warren France created the first packing ring in the cellar of his home in the early 1880s and the rest is history. CPI, formerly France Packing Co., garnered immediate success with its innovative packing ring design. Shortly after the business was established in 1898, it secured business relationships with the government and various industries that led on the edge of engineering innovation––like the United States Navy and many of New York’s emerging power plants.

One year later, in 1899, the original patent for France’s segmental tangent cut packing ring were filed and obtained. Now, more than a century of innovation later, that same packing ring design and original patent remains the industry standard.

Wiper Rings

We design each and every one of our wiper rings to provide a tight seal that works to keep lubricants where they belong – within the crankcase. In doing so, we can help keep your compressor running longer and more efficiently.


  • Available in metallic and non-metallic materials to fit your needs
  • Custom manufactured to your exact specifications


Basic Packing Ring Designs

  • Single acting seal rings/pairs
  • Double acting seal rings/pairs
  • Backup rings
  • Pressure breakers
  • Pressure breaker with relief slots

Packing and Wiper Ring Materials

  • CPI's Special polymer alloys
  • PTFE
  • Thermoplastics
  • Bronze
  • Cast iron

Basic Wiper Ring Designs

  • Tangent cut unidirectional
  • Tangent cut bidirectional
  • Radial cut wiper rings



Emissionguard ES³ LTR Howden.pdf


Emissionguard™ TR² Packing Ring

  English LTR
  English A4

Packing Rings Installation

  English LTR
  English A4