An O-Ring is a gasket, or a ring which is fitted into grooves in machinery that deal with high pressure fluids. This is done to prevent loss or transfer of fluids. The simplest example of this would be a tap. The O-Ring fitted inside it prevents the water from leaking out.

A normal O-Ring will be made of 2 parts, the O-Ring itself and a proportionate cavity or gland to hold the elastomeric material. They can also be used to prevent leaks between interconnected pipes, tubes, etc. O-Ring are usually made of rubber, plastic, metal or nitrile.

Proceeding from a household level to a more industrial one, they are especially important in rockets, car engine, and high power machinery.

The selection of raw materials in the O-Ring manufacturing process is a very crucial one, given the vast range of usages it may have, from fittings and appliances, to aerospace systems, hydraulic and plumbing. A number of solutions come into contact with O-Ring during this process, such as minerals, oil, radiation, hydrocarbon, gas, soaking solutions and acids.

After the selection of raw materials, production begins, which consists of two separate kinds of moulding, namely :

a) Horizontal injection presses
b) Compression moulding, compression presses which are usually used to produce in Vitron and Silicon, small quantities and samples

Next comes deflashing, which is the process of separating the excess rubber from the gaskets and O-Ring, which ensures that they have a smooth surface, thus enabling better seals against fluids or gases.

Grinding and polishing further makes sure that no “flash witnesses” remain, and the surface is sufficiently smooth.

After that, comes a specialised heat treatment, known as the post vulcanization treatment, also sometimes as post curing. This allows the vulcanization process to be completed, and the maximum elastomer quality to be attained.

Post this, comes the selection and testing process, which is rigorous and intense, with automated machines testing for surface defects such as dribble and air bubbles, and necessary requirements such as flatness, and dimensional tolerances. High precision instruments which consist of thickness gauges, hardness testers, ovens, callipers, thermostatic baths and automatic projectors are then put to use on the O-Ring.

Following this, the products are packaged carefully, and transported to warehouses, to await either further transport to retailers and wholesalers, or deliveries to the final consumers.

There are several manufacturers O-Rings nowadays, each with their own specialities.

There will be some companies, such as LAV EL GOMMA who have their own unique ways of surface treatment, such as no treatment “silicone free”, silicone oil, graphite, molycote, talcum powder and PTFE.

We at Ismat give high quality products at competitive prices and have a delivery network not just across India but globally as well. We export O-Rings to countries like Germany , UK , USA and across the middle east.