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Hebei Hankai 40 80 10 oil seal
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Seal design also varies, with common designs being single-acting, double-acting, and U-cup seals
hydraulic ram oil seals. The choice depends on the specific application requirements, such as pressure, speed, and duty cycle. Additionally, some advanced designs incorporate anti-extrusion rings to prevent seal deformation under high pressure.

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In addition to preventing leaks, the outer hub oil seal also helps to keep dirt and water out of the wheel hub. If these contaminants were to enter the hub, they could mix with the lubricant and create a sludgy, abrasive mixture that can damage the bearings and other components. By creating a barrier between the outside environment and the lubricant inside the hub, the oil seal helps to ensure smooth and efficient wheel operation.
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3. Pressure Maintenance In many applications, oil seals are designed to maintain pressure within a system. By preventing the exit of oil and the entrance of contaminants, they help in sustaining the necessary pressure levels for optimal operation. This function is especially important in hydraulic systems, where pressure plays a critical role in performance.
what is the function of oil seal

Oil seals come in various designs depending on the specific requirements of the machinery. The 20x30x7 oil seal, for example, is a standard radial shaft seal that is installed along the shaft to prevent oil from leaking out or contaminants from entering the machinery. This type of seal is commonly used in engines, gearboxes, and other rotating equipment where the sealing of fluids is essential.