Delivering Fluid Sealing Solutions Since 1972

Cast Iron Piston Rings

Cast Iron Piston Rings to fit Cylinders for Mobile and Industrial Hydraulics, Compressors, and Transmissions.

M Barnwell Services is a leading stockist and distributor of Piston Rings* for tractors, passenger vehicles, commercial vehicles, motorcycles, stationary engines, compressors and special applications.

The combination of over 50 years of experience and modern manufacturing techniques enables us to be a trusted supplier of Piston Rings to the worlds largest OEM’s and aftermarket dealers. We can provide solutions to fit Deutz, Massey Ferguson/Perkins, John Deere, Ford, Fiat, Renault, Peugeot, DAF, Volvo and Lister vehicles.

We supply:

  • With internal and external tension
  • In all joint types and ring styles
  • In the diameter range of 8 to 1000 mm*
  • To recognised national and international standards
  • According to customer specifications, drawings or samples

Each Piston Ring is made from the highest quality raw materials and machined to OEM standards. In addition to this, Statistical Process Control can be applied to all critical processes to control the quality during the manufacturing process.

Cast Iron Piston Rings

If you are unsure of the Cast Iron Piston Rings you require, contact our specialist team of sales engineers who will recommend the right solution for your application. The Hydraulic and Pneumatic Seals page also contains further information about our range of Rod Seals (Gland Seal / headbush / neck seals), Piston Seals / Piston Rings / Cup Seals, Wiper Seals, Static Seals and Guide Rings.

We have a number of Seal Maker machines that can manufacturer standard, bespoke and prototype fluid seals within 24 hours or sooner. Visit the Seal Maker Service page for more information.

* Cast Iron Piston, subject to availability.


Off-road vehicles, passenger vehicles, heavy and light commercial vehicles, motorcycles, stationary engines, compressors and special applications

Diameter sizes

8 – 1000 mm (Depending on Type)

Standard - 10 – 400 mm


High grade cast iron alloy / special alloy steel / S.G. iron


Compression rings of shapes rectangular, keystone, taper periphery, bevelling, napier, etc.Oil control rings of shapes plain, bevelling, coil spring-loaded, duaflex, 3 flex, etc

Surface treatments

Chrome plating, phosphating, tin/copper coating, gas nitriding, etc