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.

油封和潤滑脂密封件有一個柔性唇，可與軸或殼體摩擦，以防止液體和污垢泄漏或進入。軸速度、流體溫度和偏心率只是密封件必須調整的幾個操作條件。油封和油脂密封件的密封方向和方向很重要。方向和方向可以是內部或桿密封、外部或活塞密封、對稱密封或軸向密封。

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.

油封和油封的密封類型可以是油封或其他類型。油封也可稱為柔性唇或旋轉軸密封。這些密封件具有嚴格的功能，它們保護所有類型的精密結構、緊密配合的滾珠、套筒和滾柱軸承。