The o-ring is a double-acting sealing element. The sealing effect is achieved by deformation of the round profile of the o-ring. The size of the deformation is determined by the groove depth. The deformation, which is sometimes called also depression or pre-tension, acts in radial or axial direction and provides the o-ring with the initial sealing ability. Under pressure, the o-ring behaves similarly as a liquid with high surface tension. The pressure is uniformly transferred in all directions. The force raised by the initial deformation of the o-ring is added to the force raised by the pressure in the system and they together create the resulting sealing force.

• it may be used as the single and double acting solutions due to its symmetrical diameter
• simple groove decreases costs for design and production
• compact shape enables lower built-up
• simple and reliable installation, incorrect assembly is not possible
• it inexpensive and enables cost-effective solutions

• usability for wide range of static and dynamic sealing applications
• wide choice of mixtures for compatibility with most of the liquids
• with radial compression, e.g. for cocks, valves, hydraulic cylinders
• with axial compression, e.g. flange joints, lids, hydraulic elements
• For dynamic applications, the o-rings are recommended only for mild operating conditions.