Under BFY series insulation liquid pump is a new product based on the performance parameters of the basis of the next FY liquid pump for the transmission medium is easy to crystallize and liquefy the solid state media and design. It features in the liquid part of the design of the insulation jacket with steam, the steam cycle to ensure that the liquid does not play crystal. The unique structure of selected impeller, the pump energy efficient, no leakage, long life, which is widely used in petroleum, chemical, pharmaceutical, paper, metallurgy, sewage treatment and other industries. Under BFY insulation product features a sump pump. The pump is a pump, fluid appearance under vertical, mounted directly on the storage medium to be delivered, no additional floor space, thereby reducing infrastructure investment. 2. The device is equipped with a liquid through a steam pipe is to transport liquefied medium transport easy to crystallize under solid state media and design new products. 3. Cancellation of the mechanical seal, to solve the other liquid pump mechanical seal easy to wear and require frequent maintenance trouble, saving the pump operating costs, improve work efficiency. 4. Uses a unique double-balanced centrifugal impeller for conveying solid particles, such as cleaning the media, ultra-low vibration and noise, high efficiency; open double-balanced impeller for conveying dirty liquid with solid particles and short fibers running smoothly, without clogging