The gear pump is compact and simple, with a limited number of moving parts. They cannot match the pressure generated by reciprocating pumps or the flow of centrifugal pumps, but they provide higher pressure and throughput than vane pumps or lobe pumps. Gear pumps are particularly suitable for pumping oil and other high-viscosity fluids.

In both designs, due to stronger shaft support and smaller tolerances, internal gear pumps have better suction capacity and are suitable for high viscosity fluids, although their effective working range is 1 cP to more than 1,000,000 cP. Since the output is proportional to the speed, gear pumps are commonly used for metering and mixing operations. Gear pumps can be designed to handle corrosive liquids. Although they are usually made of cast iron or stainless steel, new alloys and composite materials enable the pump to handle corrosive liquids such as sulfuric acid, sodium hypochlorite, ferric chloride, and sodium hydroxide.


Zhejiang Yongling Hydraulic Machine Co , Ltd . is a professional hydraulic pump manufacturer and hydraulic pump supplier producing Internal Gear Pumps and Vp Series Variable Displacement Vane Pumps . Our products are widely used in cutting, plastics, forging, engineering, leather, pressure, metallurgy, agriculture, transportation machinery and machine tools, hydraulic stations, automatic production lines and other fields. Welcome to consult and purchase: https://www.china-vanepump.com/product/internal-gear-pumps/