An O-ring is a type of ring-shaped seal with a round cross-section, usually made of rubber or elastomer. It is used for sealing and is sandwiched between two surfaces to prevent the passage of liquid or gas. It has a wide range of uses thanks to its simple structure and versatility. O-rings are generally preferred as sealing elements in pressurized systems, pipe connections and mechanical parts.
O-Ring Types:
Rubber O-Rings:
NBR (Nitrile Rubber): It is an economical and widely used O-ring material that is resistant to petroleum-based oils, fuels and various chemicals.
EPDM (Ethylene Propylene Diene Rubber): Resistant to water, steam and ozone. It is preferred in hydraulic fluids and the automotive industry.
Viton (FKM): Known for its high temperature, chemical resistance and oil resistance. It is used in the automotive, aerospace and chemical industries.
Silicone O-Rings: Maintains its flexibility over a wide temperature range and is widely used in food and medical applications.
Plastic O-Rings:
PTFE (Teflon) O-Rings: Resistant to high temperatures and chemicals, but has low elasticity. It is used in the chemical, oil and gas industry.
Polyurethane O-Rings: Resistant to wear and tear, so they are common in hydraulic systems.
Metal O-Rings: Used in high pressure and extreme temperature conditions. It is produced from metals such as stainless steel, copper or aluminum.
O-Ring Usage Areas:
Hydraulic and Pneumatic Systems: Provides sealing in liquid or air-operated equipment such as cylinders, valves and pumps.
Automotive Industry: Used in components such as engines, transmissions and steering systems. Prevents leakage in oil, fuel and cooling systems.
Chemical and Petrochemical Industry: Provides resistance to aggressive chemicals in chemical reactors, pipelines and valves.
Food and Pharmaceutical Industry: Silicone or PTFE O-rings are used to seal in environments requiring hygiene and safety.
Aerospace Industry: Used in critical aircraft components to provide reliable sealing under high pressure and temperature.
O-rings are distinguished by their flexibility, durability and cost-effectiveness in many applications requiring sealing. Choosing the right material should be made according to the chemical, temperature and pressure conditions of the environment in which the O-ring will be used.