BW asphalt insulation pump for conveying thickened at room temperature, solidification or the crystallization temperature and easy to maintain a certain flow of a medium designed, such as asphalt, wax, rosin, heavy oil, and the similar nature of the liquid resin at a temperature not higher than 300 ℃ . The BW insulation asphalt pump has a circulation pump mezzanine, and has access to the interface, can be used for thermal oil, steam, hot water, cold water and other media for pumping of liquids and heating, insulation and cooling. The heat pump is available BW pitch stainless steel, high requirements for the delivery of health conditions or corrosive liquids.