An O-Ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface. The O-Ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-Ring. Dynamic examples include rotating pump shafts and hydraulic cylinder pistons. O-Rings are one of the most common seals used in machine design because they are inexpensive, easy to make, reliable, and have simple mounting requirements. They can seal tens of megapascals (thousands of psi) of pressure.
O-Rings perform their sealing action by deforming to take the shape of their cavity, after being oversized to guarantee a predetermined interference fit.The seal is designed to have a point contact between the O-Ring and sealing faces. This allows a high local stress, able to contain high pressure, without exceeding the yield stress of the O-Ring body. The flexible nature of O-Ring materials accommodates imperfections in the mounting parts. They can withstand fluid pressures upto 100 bar (1500lbs/in2) provided such seals are properly designed and applied. The pressure ratings of the dynamic O-Ring seal can be enhanced by using suitable back-up rings. The back-up rings may be of acetal resin, PTFE or Fabric reinforced rubber.
SourceSync offers an unrivalled range of over 300 high performance seal materials from the types of elastomer (rubber) shown below. Our Materials Technologists are constantly developing new seal materials to meet the increasing demands of today's engineering applications. We have relationships with major compounders and can provide genuine base polymers from brand name companies.
An in-depth knowledge of materials, advanced production capabilities and quality assurance methods combined with the zero-defect philosophy allows SourceSync to meet these ever increasing requirements for pressure, temperature, geometry, chemical resistance, hardness and physical stress. A wide range of elastomeric materials combined with specifically engineered coatings are used to transform this “simple” sealing element into a critical component for a surprisingly vast array of applications in all areas of industry.
SourceSync elastomer materials can be molded into infinite geometries, profiles and sizes to suit any sealing application. From the smallest O-ring to more complex composite parts, our objective is to meet customer needs with a variety of high performance sealing solutions. If the seal you require does not already exist, we can design and manufacture it for you, with the benefit of more than 30 years experience in the sealing industry to draw upon.
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