by ElringKlinger Kunststofftechnik GmbH

PTFE Laminated Piston for Dry Running Compressors

  • Maximum use of available guide surface
  • High-temperature-resistant PTFE
  • Operating temperature range depending on application from -60°C to +200°C
  • Minimal thickness of the PTFE guide band casing
  • In dry-running compressors as plunger piston guide for compressing 100% oil free air
  • To achieve minimum friction and to serve as an optimum guide for low-lube operations
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Our PTFE technology

  • PTFE – even without lubrication – excels at offering an exceptionally low coefficient of friction in combination with metals and plastics
  • PTFE is highly anti-adhesive, without any stick-slip effect
  • PTFE has high elongation properties enabling easy fitting of sealing and guide elements to one-piece pistons
  • PTFE – when subject to moderate stress – offers an exceptionally wide (for plastics) thermal operating temperature range depending on application from -260°C to +260°C
  • PTFE is chemically resistant to nearly all solid, liquid and gaseous media
  • PTFE is age-resistant, non-combustible and physiologically neutral in the state temperature range

Benefits of the PTFE Coated Piston Compared with Standard Guide Bands and Rider rings

  • The specific surface pressure is reduced by coating the entire piston skirt all the way to the seal groove. By maintaining a low radial section of the bearing element, thermal expansion is reduced allowing significantly lower running clearances to be specified.
  • Reduced running clearance largely prevents piston slap, resulting in significantly smoother operation
  • Improved heat transfer from the piston to the cylinder wall due to the low coating thickness and large contact surface area

Application areas

  • Compressors operating under full and low-lube conditions
  • Gas rotary pumps
  • Expansion machinery
  • Liquid gas and vacuum pumps
  • Rotation compressors for loading/unloading of tanks
  • Generation of oil-free compressed air

Operating parameters

  • Operating temperature from -60°C to 200°C depending on application
  • Average piston speed up to 5.2 m/s
  • 100 bar max. pressure differences to be sealed
Manufacturing Readiness (MRL)

Technology Readiness (TRL)

Min Ambient Temperature (in °C)

Max Ambient Temperature (in °C)

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    ElringKlinger Kunststofftechnik GmbH

    Innovations in high-performance plastics - for over 50 years, ElringKlinger Engineered Plastics has been one of the technology leaders for seals, engineering design elements, assemblies and modules. At ElringKlinger, innovation always starts with the material. Due to in-house materials development and compounding, Polytetraflon™-PTFE materials and Moldflon™-thermoplastic materials can be customized. Optimal performance for our customers is achieved not only by means of component optimizations using the Finite Elements Method (FEA) but also by selecting suitable materials.

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