6 MPa; Class 2: The maximum working pressure is 1.4 MPa; Due to the various conditions of the conveying medium, for the medium with severe abrasiveness, the appropriate number of stator stages should be selected according to the requirements for the conveying pressure. Class 1: The maximum working pressure is 6 MPa; Class 2: The maximum working pressure is 1.4 MPa; Due to the various conditions...