Thin Liquid Gear Pumps

These thin liquid internal-gear pumps handle low-viscosity liquids with high efficiency, offering many advantages in applications normally associated with centrifugal pumps. The pumps are self-priming and capable of reversible flow direction, enabling the use of one pump instead of two for loading/unloading or line stripping. The pumps’ flow is directly proportional to input speed, allowing them to meter process liquids. They are available in iron, steel or stainless steel, with adjustable end clearances and idler gears of iron, non-galling 770 alloy or PPO composite. The pumps offer capacities up to 17 m3/h (75 gal/min) and a pressure range of 0–7 bar (100 psi) at viscosities from 0.1 to 4 cSt, or up to 17 bar (250 psi) at higher viscosities. Close- or long-coupled options, with motor-speed operation, reduce overall system cost and space required.