Q971 electric wafer ball valve used in cutting off 、adjusting fields. Direct connection between valve and actuator, inside valve there is servo system, need no servo amplifier, input 4-20mA signal and 220VAC power to control work. Simple connection, impact structure、small size、light weight、small resistance、stable and reliable action. According to users’ requirements can choose UNIC、PSQ、HQ、DHL electronic electric actuator or GTX、AL gas piston actuator