1. Product introduction

     The ventilation butterfly valve including quarter turn electric actuator and ventilation butterfly valve. The FOSD valve actuator of ventilation butterfly valve has the function of servo operation and position feedback signal, position indicator, hand wheel operation, it’s powerful reliable, and precise. Regulating or open and shut the valve  to control the medium by the FOSD valve actuator that was controlled by the voltage of 24V AC, 220V AC, or 380V AC ,and signal 4-20mA DC or 1-5V DC.