O-ring O-rings (O-rings) is a circular rubber ring section, because of its cross-section of the O-type, it is called O-rubber seals, also known as O-ring. Began to appear in the middle of the 19th century, when it was used as a steam engine cylinder sealing element.
O-rings are the most common mechanical design for sealing because of their low cost, simple manufacturing, reliable operation and simple installation requirements. The O-ring is under pressure from tens of megapascals (thousands of pounds). O-rings can be used in static applications and can also be used in dynamic applications where relative motion between components, such as rotary shafts and hydraulic cylinders
O-ring specifications and standards
O-ring specifications models are UHSO ring specifications, UHPO ring specifications, UNO ring specifications, DHO ring specifications, piston rod O-ring specifications, high temperature O-ring, high pressure O-ring, corrosion-resistant O-shaped Ring, wear-resistant O-ring.
O-ring standard of the main GB GB 1235-76, GB GB3452.1-92; Japanese standard P TYPE, G TYPE, S TYPE, SS / V TYPE, F TYPE; American Standard AS568, British standard series; European standard series
O-ring technical requirements include appearance requirements, dimensional requirements and material physical performance requirements.
Appearance requirements in line with GB / T3452.2-2007
Material requirements meet HG / T2579-2008
Size requirements in line with GB / T3452.1-2005
O-ring application introduction
Hole with YX type O-ring
Product use: for reciprocating hydraulic cylinder in the piston seal. Scope: TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: hydraulic machine for construction machinery and high temperature and high pressure cylinder. Material: Polyurethane TPU, CPU, rubber.
Product hardness: HS85 ± 2 ° A Operating temperature: TPU: - 40 ~ +80 ℃, CPU: -40 ~ +120 ℃ Working pressure: ≤ 32Mpa Working medium: hydraulic oil, emulsion.
YX-type hole with O-ring
Product use: This standard applies to the cylinder working pressure greater than 16MPa when used with YX-type seals, or cylinder eccentric force, the role of the protection ring. Operating temperature: -40 ~ +100 degrees. Working medium: hydraulic oil, emulsion, aquatic product Hardness: HS 92 ± 5A Material: Teflon.
Shaft with YX type O-ring
O-rings Product use: for reciprocating hydraulic cylinder piston rod seal Scope: TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: hydraulic machine for construction machinery and high temperature and high pressure cylinder. Material: Polyurethane TPU, CPU, rubber Product hardness: HS85 ± 2 ° A Operating temperature: TPU: - 40 ~ +80 ℃ CPU: -40 ~ +120 ℃ Working pressure: ≤ 32Mpa, working medium: hydraulic oil, emulsion.
O-ring sealing performance, high working life, dynamic pressure seal working life than conventional rubber seal products 5-10 times higher, up to several times, under certain conditions can be sealed with the same life.
O-ring frictional resistance is small, dynamic and static friction are equal, is "0" shaped rubber ring friction 1 / 2-1 / 4, can eliminate low-speed, low-pressure movement of the "crawling" phenomenon.
O-ring high wear resistance, sealing surface wear with automatic elastic compensation.
O-ring good self-lubricating performance. Can be used for oil-free seal.
O-ring structure is simple, easy to install.
O-ring working pressure: 0-300MPa; working speed: ≤ 15m / s; operating temperature: -55-250 degrees.
O-ring for media: hydraulic oil, gas, water, mud, crude oil, emulsion, water - ethylene glycol, acid.
O-rings are suitable for use in a variety of mechanical equipment, in the specified temperature, pressure, and different liquid and gas medium, in the static or moving state from the sealing effect. In the machine tools, ships, automobiles, aerospace equipment, metallurgical machinery, chemical machinery, construction machinery, construction machinery, mining machinery, petroleum machinery, plastic machinery, agricultural machinery, and various instruments, a large number of applications of various types of seals element. O-rings are mainly used for static and reciprocating seals. For rotary motion seals, only for low speed rotary seals. O-ring is generally installed in the outer or inner circle on the rectangular cross-section of the seal from the role. O-ring in the oil, acid, grinding, chemical erosion and other environments still play a good seal, shock absorption. Therefore, O-ring is the hydraulic and pneumatic transmission system used in the most extensive seal.