Sleeved Soft Sealing Plug Valves by sealing surface sealing sleeve around to achieve. Unique 360 ° metal lip to protect the fixed card sets, valves no cavities to accumulate media, metal lips provide self-cleaning effect at the time the cock turn, suitable for viscous and easy scaling conditions, two-way flow, using the installation more convenient. Ferrule soft sealing plug valves for nominal pressure CLASS150 ~ CLASS900, operating temperature of the oil, chemical, pharmaceutical, fertilizer, power industry -29 ℃ ~ 180 ℃ and the like.