What is the difference between Oil seal and mechanical Seal?

Oil seals and mechanical seals serve different purposes in sealing applications. An oil seal is designed to prevent the leakage of lubricants and contaminants in rotating machinery, typically using a flexible lip that contacts a shaft. In contrast, a mechanical seal is used to prevent fluid leakage in rotating equipment, such as pumps or mixers, by utilizing a combination of stationary and rotating components that create a tight seal under pressure. While oil seals primarily focus on sealing against oils and greases, mechanical seals are engineered for more demanding applications involving various fluids and pressures.