text: JDB series centrifugal pumps.The utility model is suitabe for drainage devices, such as construction machinery, industrial machinery, industrial machinery, engineering construction, etc.. The pump is composed of a three-phase or single-phase asynchronous motor and a pump body. It has the advantage of full head performance, compact structure, high efficiency, energy saving, and convenient operation. The interface can be matched with non-standard interface according to user's requirements, and flow regulating device is also available.