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
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