• October 19. 2022

The convertible rotary seal has a housing for receiving the polishing rod. A mandrel is rotatably mounted in the seal housing and surrounds the polish rod. A wear sleeve surrounding the mandrel engages a primary seal. A secondary seal engages the mandrel and polish rod and rotates therewith but may be converted for use as a static seal if necessary. A locking mechanism selectively secures the mand...

• January 17. 2023

According to different materials, hydraulic rotary seals must have the following performance characteristics: 1. The seals has certain mechanical and physical properties: such as tensile strength, constant elongation strength, and elongation; 2. The material structure of the seals has a certain degree of elasticity, the hardness is verified, and the compression permanent deformation is small; 3.3....