German aventics seals aventics model aventics price

aventics seals are materials or components that prevent leakage of fluids or solid particles from between adjacent mating surfaces and prevent external contaminants such as dust and moisture from entering machinery. The recommended storage room temperature for seals is below 30 °C to avoid high-temperature aging. Seals can be divided into two main categories: static seals and dynamic seals. Their primary function is to prevent leakage of fluids or solid particles from between adjacent mating surfaces and to prevent external contaminants such as dust and moisture from entering machinery components or measures. Static sealing refers to the tight closure of sealed chambers and containers, used for sealing letters and wills with stamps.

aventics seal types

1) Compression seals: Compression seals, especially O rings, have been widely used in sealing applications. Other types such as X, T, D, square, and triangular shapes are suitable for different applications. Improvements aim to stabilize sealing performance, increase pressure resistance, and reduce friction. They can also form combination seals with low-friction plastics such as PTFE and nylon slide rings and support rings to increase pressure resistance and reduce friction. Some manufacturers' products are rated for speeds up to 7.5m/s and sealing pressures of 5.6MPa. 2) Reciprocating lip seals: Reciprocating lip seals, also known as lip gaskets or cups, are widely used for dynamic sealing in hydraulic system reciprocating cylinders. The pressure-bearing surface is lip-shaped, with a slight interference fit during installation to ensure full contact between the lip edge and the sealing surface. During cylinder operation, as pressure increases, contact force and area increase, improving sealing. During the return stroke, pressure decreases, and contact area and friction are lower than during the working stroke, creating a breathing effect that lubricates the lip. There are many types of reciprocating dynamic seals, commonly including J, L, U, V, and Y types. There are also various combination and composite seals, such as bellows, diaphragm, and multi-lip seals. Extrusion must be prevented under high pressure by selecting materials with sufficient tear strength, hardness, and modulus, or by using support rings or reinforced elastomers. Seals used in high-pressure, high-speed, or high-temperature conditions often use composite combination seals. Their common feature is having two lips in contact with the cylinder wall. A groove in the middle of the sealing area stores media, improving lubrication, reducing lip wear, and ensuring reliable sealing. Lip seals for pneumatic systems are required to operate without oil lubrication, with contact pressure; some integrate dust wipers with the seal. 3) Rotary shaft lip seals: There are no fewer than 200 varieties of similar structures, such as hydrodynamic, inner skeleton, assembled, exposed skeleton, bonded PTFE AF type, and dual-modulus return flow types. The advantage of exposed skeleton assembly is accurate positioning, high concentricity, and good heat dissipation. It is stable under pressure and vibration, resulting in longer service life and saving rubber material. The dual-modulus return flow type applies wave seal theory, adding a low-modulus, easily deformable material at the sealing contact point to achieve a return flow effect, while reducing product design and mold processing costs. Joints between rigid waterproof layers and gable walls, parapet walls, and protruding roof structures should be properly treated (flexible sealing).

aventics seal influencing factors

Hydraulic seals play a crucial role in the integrity of hydraulic and pneumatic systems. If the seals on a hydraulic or pneumatic component are inadequate, the component is not considered a good product. Many factors affect seals. First, pressure is a significant factor affecting seal performance; the magnitude of pressure and the duration of pressure cycles greatly impact seal damage (such as extrusion). The higher the pressure, the greater the influence of other factors on seal performance, such as temperature, speed, seal material, clearance between piston and cylinder barrel, and clearance between piston and cylinder head. Another factor is temperature and friction. It is difficult to define the maximum and minimum operating temperatures for a seal material because this is the result of a combination of factors. Operating temperatures for pistons and piston rods differ, requiring distinct selection criteria. Another factor is the surface roughness of the seal product; surface characteristics, pressure, media, temperature, seal material, seal type, and motion speed all influence seals. Finally, surface treatment. Experience shows that the surface characteristics of cylinder pistons and piston rods significantly affect seal life. Surface characteristics are commonly defined by the RA value, which is the arithmetic mean of the absolute deviations of the surface profile from the centerline. However, these values do not fully represent the impact of surface conditions on seals, as different surface shape characteristics can lead to varying degrees of seal wear even at the same roughness.

aventics seal functions and applications

Engine: Crankshaft - front and rear crankshaft oil seals; Valve - valve oil seals (engine repair kit o rings) (distributor oil seal, water pump oil seal, balance shaft oil seal, oil pump oil seal...); Camshaft - camshaft oil seal; Transmission: Transmission - front and rear transmission oil seals; shift lever oil seal (transmission repair kit o rings) (transfer case - front and rear transfer case oil seals); Rear axle: Half-shaft - rear half-shaft oil seal; Differential - (front/rear) pinion oil seal; rear wheel oil seal; front wheel oil seal; steering gear oil seal (steering gear repair kit o rings); power steering oil seal (front half-shaft oil seal). Oil seals are required wherever rotating housings contain liquid lubricants and connect to the exterior. Some are made of rubber, some of metal, but most are steel-cased rubber, such as rear crankshaft oil seals, front and rear transmission oil seals, left and right half-shaft oil seals, final drive front oil seals, and air compressor crankshaft oil seals.

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