F2957 electric series is eccentric type segmental ball valve for modulating application,comparing to globe valve ,body size is compact,lighe weight,and yet it has large CV value,large
rangeability(comparing to globe valve ,it has large CV value,and large rangeability,R=100:1),and can be convertible to reduced bore type(60%,40% reduce)by changing seal ring only,it is especially
suit for control of fibrous,dirty,viscous and corrosive medium