1. Self-lubricating material bushing can be used according to operating temperature and working medium. It has good lubrication, small friction coefficient of sealing pair, flexible operation of plug body and long service life.

2. the media can be two-way flow, installation direction is not restricted, online maintenance, use more convenient.

3. The unique design can prevent static electricity, fire safety and safety.

4. good sealing performance.

5. no vibration, little noise.