1. high vacuum, low power,high pump speed 2. widely used in mining industry 3. ultimate pressure: 33mbar Instructio2SK series two-stage liquid ring vacuum pumps can work well like two sets of SK series water ring vacuum pump. Due to SK series vacuum pumps only reach the maximum vacuum of-700mmHg, to meet the high vacuum and the large pumping speed under high vacuum, China developed the 2SK series ...