O Rings are the gaskets offered in the form of rings or an âoâ with a round cross section that is typically made of ductile material. These rings are used to seal connections as well as joints in tubes, pipes, etc. These are applicable for hydraulics, or pertaining to a moving liquid operational in a shut-in space under pressure. These suffice as the least expensive as well as most reliable options these days. These products are used in various equipments such as compressors, pumps, valves, engines, boilers, condensers, refrigerators, heaters and heat exchangers. These loops of elastomer, known as O Rings are proffered with a round cross-section, made to be seated in a groove as well as compressed during fabrication between two or more parts.