Main features and benefits of internal gear pumps The working principle of internal gear pumps is simple, and
The number of moving parts is small. They cannot match the pressure generated by a response pump or the flow of a centrifugal pump, but they provide higher pressure and throughput than vane or vane pumps. Internal gear pumps have better suction capacity than external gear pumps and are more suitable for high viscosity fluids. Because output is proportional to speed, internal gear pumps are often used for metering and mixing operations. The small internal volume allows reliable measurement of the liquid flowing through the pump for precise flow control. The main applications of internal gear pumps are in accordance with the working principles of GA internal gear pumps. Some typical applications include:

Fuel and lubricants;
Resins and polymers;
Alcohol and solvents;
Bitumen, bitumen and tar;
Polyurethane foam;
Food such as corn syrup, chocolate and peanut butter;
Paints, inks and pigments;
Soaps and surfactants;
Ethylene glycol


Internal gear pumps move fluid by repeatedly enclosing a fixed volume in the interlocking gears and mechanically transmitting them to provide a smooth, pulse-free flow proportional to the speed of their gears. They are versatile and capable of operating over a wide range of fluid viscosities and temperatures. They are the first choice for external gear designs in applications involving higher viscosity fluids, high temperatures, and solids-containing fluids. In general, the internal gear design runs at a lower speed than the external gear design with a larger clearance, so it is less prone to wear in these applications. For the same reason, internal gear pumps are also more suitable for pumping fluids that are sensitive to shear.

Zhejiang Yongling Hydraulic Machinery Co., Ltd. is a professional China manufacturer and supplier of    Internal Gear Pumps  . Welcome to purchase our internal gear pump products, and live up to your expectations: https://www.china-vanepump.com/product/internal-gear-pumps