Plug valve is a quarter-turn valve similarin design and operating principles. Suzhou Sunco Valve can manufacturefrom 1/2” to 48”, 150LB-2500LB, both in the soft and metal seat design, lubricated and non-lubricated design as per API 599 and API 6D, including the pressure balance type, lifting plug type, orbit plug type (general valve), sleeved type and lined type.