We are professional manufacturer and exporter for mini motorized ball valves in China.Mini Electric ball valve definition: Mini Electric ball valve also named mini motorized ball valve,motor operated valve,automatic control valve. It is considered "mini",because it only measures approx 3 inches wide by3 inches tall ,and it only weights approx 0.3~0.5KG/pc. It is consdered "economic" because it only cost approx 25~48USD for the high quality similar to Danfoss or other famous brand in international worldwide,also, you save more money because you are buying from our factroy directly. Mini electric ball valve is electrically operated valve used in various water treatment system,it is made of two parts,Electric actuator+Ball valve,the valve will open&close when voltage applies to the motor. Wanna to find out how it works? Find us on the Youtube:http://www.youtube.com/user/smartvalves ,Amy is showing the valve for you there .