NCB-12 / 0.7NCB type internal gear pump is the use of gear meshing principle, the internal and external gear pitch circle close to one side, the other side is covered by a "crescent" pump cover; To the rotation, the teeth in the import separation from each other to form a negative pressure suction fluid, gear teeth at the exit continue to intermesh and squeeze the liquid output. Because of this unique structure, it is particularly suitable for conveying medium with high viscosity, viscosity range of 0.2-100000cp; this series of pumps can be reverse delivery, as long as the motor can be changed to the steering; pump body can be turned, import and export position into Right angle, easy to choose the location of the import and export; NCB-BW pump in the pump, cover, bearing housing are easy to connect the insulation or cooling medium out of the interface. The pump has: no trapped oil phenomenon, stable output, high efficiency, low noise, long life advantages. Application: NCB-12 / 0.7NCB type internal gear pump suitable for conveying a variety of light, volatile liquids, until the heavy, viscous liquid, and even semi-solid liquid. Widely used in petroleum, chemical, grease, paint and other industries.