... Product instruction: QDX,QX series submersible pump consists of pump, mechanical seal and motor.Pump is at the bottom part of pump ... and motor combine, which is a kind of double end mechanical seal, O ring scare applied to all stanchions. Application: This series ... be inserted into sludge. 5.Power frequency should be 50Hz, single phase voltage 220V, three-phase voltage 380V, and voltage fluctuation ...