Oil seals and grease seals have a flexible lip that rubs against a shaft or housing to prevent the leakage or ingress of fluids and dirt. Shaft speed, fluid temperature and eccentricity are but a few of the operating conditions to which the seal must adjust. The sealing orientation and direction is important to consider for oil seals and grease seals. The orientation and direction can be internal or rod seal, external or piston seal, symmetric seal, or axial seal.

油封和润滑脂密封件有一个柔性唇，可与轴或壳体摩擦，以防止液体和污垢泄漏或进入。轴速度、流体温度和偏心率只是密封件必须调整的几个操作条件。油封和油脂密封件的密封方向和方向很重要。方向和方向可以是内部或杆密封、外部或活塞密封、对称密封或轴向密封。

The seal type for oil seals and grease seals can be oil seals or other types. An oil seal can also called flexible lip, or rotary shaft seal. These seals fulfill an exacting function, they protect all types of precision constructed, close fitting ball, sleeve ad roller bearings.

油封和油封的密封类型可以是油封或其他类型。油封也可称为柔性唇或旋转轴密封。这些密封件具有严格的功能，它们保护所有类型的精密结构、紧密配合的滚珠、套筒和滚柱轴承。