The GUD-A series electric vacuum (pressure) ball valve adopts a rotary electric and electronic regulating valve driving device. It can be controlled to open, close, or intermediate position of the valve through external power switching (using manual index switches or computer control) or external input signals, thereby achieving the purpose of connecting or cutting off the airflow in the vacuum pipeline. The valve is a straight through type, sealed by a spherical surface, which can be used in both vacuum and low-pressure conditions, and can be installed in any position. The applicable working medium is gas or liquid with acid or alkaline content.