Seals are materials or parts that prevent fluid or solid particles from leaking from adjacent joint surfaces and prevent external impurities, such as dust and moisture, from invading internal parts of machines and equipment.The room temperature of seals should be below 30 ℃ to avoid high temperature aging.Classification of seals, 1. Classification by function: shaft seal, hole seal, dust seal, guide ring, fixed seal, rotary seal;2. Classification by materials: it is divided into nitrile butadiene rubber, ethylene propylene diene monomer rubber, fluororubber, silica gel, fluorosilicone rubber, nylon, polyurethane, engineering plastics, etc.
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