Hebei Hankai 20 30 7 oil seal

The designation 20x35x7 refers to the dimensions of the oil seal. The numbers represent the inner diameter (20 mm), outer diameter (35 mm), and the thickness (7 mm) of the seal. The design of an oil seal is critical, as it must fit precisely to ensure a proper seal and prevent the ingress of dirt, dust, or moisture. The choice of material used for these seals often includes rubber compounds that enhance flexibility and resilience. Common materials include nitrile rubber (NBR), fluorocarbon rubber (FKM), and silicone, each chosen based on the specific application and operating conditions.

A dust lip seal, often made of elastomers or polymers, is designed to fit closely around rotating shafts or in applications where parts move relative to one another. The primary function of this component is to create a barrier against external contaminants while allowing internal lubrication to remain intact. Typically, dust lip seals feature an outer lip that provides the necessary seal against particles and a secondary inner lip that retains lubricants within the assembly.

Seals in hydraulic cylinders serve multiple purposes. They prevent hydraulic fluid from leaking out of the cylinder, protect against contaminants entering the system, and maintain pressure within the cylinder. Common seal types include O-rings, piston seals, rod seals, and backup rings, each designed for specific functions and pressure conditions. The integrity of these seals is crucial for the hydraulic system's performance, efficiency, and longevity.

Dimensions and Specifications

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