... valve 2.size :1/2 to 4 3.colors: white ,grey,blue 4.standards:BS,ANSI,DIN SIZE 1/2” TO ... , high strength Technical characteristics: 1) Easy to stall , easy to operate 2)Applicable to the regular operation , open and close quickly ... and no noise 4)Quality : Heat ,durableApplication: Applies to swimming pool ,wastewater treatment ,agriculture ,irrigation, industrial application ball valve for water