Piston rings
Seal the compression chamber between piston and cylinder liner, dry-running or lubricated.
- Duty
- Lubricated & oil-free
- Pressure
- Low to high-pressure stages
- Supply
- To sample or drawing
Overview
Piston rings hold the gas in the compression chamber. In a non-lubricated compressor they run dry against the liner, so the ring material decides how long the stage keeps its efficiency.
Corvex rings are moulded and machined from filled PTFE and PEEK compounds chosen for the gas, the pressure differential and the liner material. For gas-specific and high-pressure duty we use our proprietary filler compositions to cut wear and extend service intervals.
Types & designs
- Single-piece rings: straight, angle (scarf) and step cut
- Two- and three-piece rings
- Half piston rings and compression rings
- Segmental and pressure-balanced designs
- Twin pressure rings
Materials
- Carbon-filled PTFE
- Carbon + graphite PTFE
- Bronze-filled PTFE
- Glass-filled PTFE
- Glass + MoS₂ PTFE
- Graphite-filled PTFE
- Proprietary Corvex compounds
- Virgin & filled PEEK for high differential pressure
Not sure which grade? Compare PTFE grades or ask an engineer.
Gases & duties
- Air
- Nitrogen
- Oxygen
- Hydrogen
- CO₂
- Hydrocarbon & process gas
- Refrigeration gases
- LPG & ammonia
Related products
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Carry the weight of the piston and keep metal off the cylinder liner.
View detailsRod packing rings
Seal the piston rod where it leaves the cylinder, segment by segment.
View detailsPressure breaker rings
Absorb pressure pulses at the front of the packing so the sealing rings behind them last longer.
View detailsHave a drawing, a sample or an OEM part number?
Tell us the part, the gas or media, pressure and temperature. We recommend the grade and send a quote.