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The QDX/QX economical submersible electric pump consists of a water pump, a seal and a motor. The motor is located above the pump and is a single-phase or three-phase asynchronous motor; the water pump is located below the motor and is a centrifugal impeller with a snail cup structure; the water pump and the motor are sealed by a double-end mechanical seal, and the fixed stops are sealed with ‘O’ type oil-resistant rubber rings as static seals.
