Any leaks occur along the contact surface, side surfaces and the lock of the piston ring. In order to prevent this ‘leakage’ and to guarantee it is gastight, good contact with the cylinder wall and the correct contact pressure is extremely vital.
 

Forces acting on a piston ring

This contact pressure is partly achieved by the internal tension of the piston ring and, in some cases, by a built-in expansion ring. However, a large part of the contact pressure is obtained by the gas pressure that presses against the ring from the rear, as you can see above.

We will gladly help you find the right compression ring for your application. Below you can see several types of compression rings as Euroring produces. This is a small selection of the many possibilities.

The accuracy of the ring in terms of tolerance range is important. The area where the ring meets is called the “lock”. In many engines the version of the lock is type: butt joint. Special types locks, such as gastight cuts, are used where even higher demands are placed on the seal.

small size compression rings

On request, the inside and/or outside of the piston ring can be chamfered to touch the inner groove radius. This is not standard and is marked KI/KA according to the international DIN ISO standard.

Euroring guarantees high quality piston rings through modern production methods and constant production evaluations. We produce according to the international DIN 34110, DIN 34118 standards and the latest ISO standards no. 6622-1/2: 2003 for piston rings.