• Stephenson & Company

Gear pumps, internal

Internal gear pumps employ gear within gear principle, which is proven for handling viscous products efficiently. The main gear is keyed to the drive shaft, and rotates concentric in the pump casing. Idler is located on a eccentric pin on the front cover to rotate freely and meshes with main gear when assembled. A crescent shaped partition precision machined on the front cover maintains a small, but positive clearance to achieve perfect scaling between parts. As the gear comes out of the mesh, vacuum is created, forcing the liquid to rush into the pump casing and fill in the voids between the teeth. Both gears rotating in the same direction of rotation gently transfer the fluid to the delivery port resulting in smooth steady flow, which is low in pulsation, noise and vibration. The pumps are available with steam jacket arrangement and also with CIP version in SS construction thus making the design ideally suited for process pumping in food processing industries, paint and varnish units, soap and shampoo industries, vegetable oil units, loading/unloading of heavy fuel, etc.