• PPUK holds probably the most comprehensive stock of Marine Piston Rings in the world.
  • We hold stock for the full range of popular 2 Stroke and 4 Stroke diesel engines.
  • We understand that vessels need rings at very short notice that is why our stocking policy and despatch service is geared towards same day shipping for stock items.
  • This service is complimented by the flexibility of our production facility allowing us to prioritise urgent or non-stock orders as well as oversized rings should specific applications parameters demand such products.
  • Supported by global shipping experts and “Known Consignor” status for aviation security, our product range is delivered to over 50 countries around the world on a daily basis from our Distribution Centre.


  • Our rings are always stored horizontally to avoid any risk of distortion.
  • All our rings have a protective layer of oil to prevent corrosion, often combined with a phosphate treatment – a chemical process which allows the ring to absorb a layer of protective oil into the cast-iron surface.
  • This combination has proved itself to be the most effective treatment for long term storage against the effects of corrosion.


  • All piston rings are marked using laser marking technology to enable ease of identification and the correct assembly procedure, which can include piston groove number.
  • Identification usually includes our logo along with the correct orientation of the product and customer part numbers. However a range of markings can be accommodated to support our customers’ demands.