Detailed Product Description SK series liquid ring (water ring) type vacuum pump SK water ring vacuum pump can pump air from containers with allowing some liquids in it. This pump can keep certain temperature SK series pump is very safe since it can keep in a certian temperature. It also can be used in all kinds of industries. Capacity: 1.5 to 120 m3/m, pressure: -0.091 -0.093 (special demand can be negotiated)