Ball valve is named by the ball inside to control the valve open and close by rotarying it 90 degree. It can be used either as shut-off valve or control valve. plastic ball valve include integral type ball valve, true union ball valve and compact ball valve. end connection by flange, socket welding and thread screw, operate by hand lever, gear box, electric actuator and pneumatic actuator. Ningbo RMI Plastic Co.,Ltd offer different models of plastic ball valve include PVC true union ball valve, CPVC flange ball valve, PVDF ball valve, PP ball valve and PPH ball valve as per standard DIN, ANSI, JIS. Plastic ball valves have the advantages as follows: 1, good corrosion resistance. 2, small size, light weight. 3, good sealing performance. 4, quick open and close, easy operate and maintaince. plastic ball valve is mainly used in water treatment, agriculture irrigation, swimming pool water supply, fish farm, mining, steel factory, chemical industrial, etc.