QDX. QX type diving electric pump series is made up of pump body, airtight packing and three-phase(single-phase)induction motor. It introduces contraprop-type water yielding, thus could introduce multistage connection in series of impellers, choose double mechnical end face sea, land has such characte ristics as good seal ability and better endurance it could deliver such media as clearwater whose temperature is below 40° C and other that is not corrsion, and pH valve between 6.5 and 8, and the solid panicle content(weight ratio)is not more than 0.1% in the water diameter of is not more than 0.2mm.