O-rings and Seals


O-rings are, in all likelihood, one of the biggest revolutions in mechanical engineering. O-rings are used to block a path that may otherwise allow a liquid or a gas to escape. They are made from different elastomers and play a vital role in both static and dynamic sealing applications. ASRI has been producing high-quality ‘O’ rings for over 50+ years. O-rings are manufactured by processes of Injection or Compression Molding and Splice/Join for customized large sizes. The sizes range from 3mm ID to 900mm ID and a list of standard sizes are available. ASRI makes ‘O’ rings from Viton, Silicone, Polyacrylic, HNBR, CR, Natural and other Synthetic rubbers.



One of the most popular choices regarding ensuring an airtight and watertight fit is rubber seals. Rubber seals mostly are found in motors, engines, pumps, and rotary shafts. Seals are flat and round, surrounded by an outer metal ring and a tilted inner ring of rubber. Prevention of leakage in dynamic conditions is achieved by the tilted angle of the seal’s inner layer. Seals are generally used to prevent the intrusion of particles and contaminants into the system. Rubber is bonded to brass for sealing in various applications. The brunt of sealing, cushioning, and abrasion resistance is born by rubber, while brass acts as the bearing surface of the rubber. An example of this application is brake seals for railway brake systems. Because of its higher resistance to oil, heat, and abrasion, the most suitable rubber for this application is Nitrile rubber, which is inherent in the operation. ASRI manufactures a full range of brass-rubber bonded seals which are used by the railways. The seals are guaranteed for high working life. ASRI also manufactures other rubber to metal bonded seals inclusive of Silicone, Viton, Polychloroprene Natural, etc. Metals could be aluminium or steel of different types besides brass.

Not sure what you need? Our technical sales team is experienced and will be happy to assist you with your project both with Design and Material Selection.