YCB-G series heat insulating gear pump is used to transfer different medium, such as heavy oil, asphalt, resin, detergent and glue, which not includes solid particles and the temperature not higher than 300 centigrade, with solidifying character under the normal temperature. It also applies to the site which heating requirement in the process technology and outdoors installation at very cold area. This series pump belongs to external gear pump. The tooth form is composite formed arc and sine curve. It could transfer many kinds of medium with steady output flow and pressure.