GRH provides a variety of different displacements for hydraulic gear pumps, ranging from 0.16cc to 200cc and made of different materials, including aluminum, copper, and cast-iron. According to different applications, GRH hydraulic gear pumps cover a wide range: low noise geared pump, ultrahigh pressure pump, Carter series shaped gear pump, chopping machine pump, PTO pump, spiral geared pump, bidirectional geared pump, and multi-stage geared pump. The maximum pressure reaches up to 30MPa.