Internal Gear Pumps

Operating Principle of Internal Gear Pumps   

Internal gear pumps operate through the interaction of an outer gear with external teeth and an inner gear with internal teeth within a housing. The smaller inner gear is positioned inside the larger outer gear, and as they rotate, their teeth mesh, trapping and moving fluid from the suction port to the discharge port. This process starts with fluid being drawn into the pump through the suction port as the gears rotate, creating expanding cavities and a low-pressure zone that sucks in the fluid. As they continue to rotate, the cavity size decreases due to the meshing of the gear teeth, which compresses and displaces the fluid towards the discharge port. The gears maintain close tolerances with the pump housing to minimize leakage and ensure a consistent volume of fluid is displaced with each revolution, a mechanism known as positive displacement. Additionally, the flow rate of the pump is proportional to the speed of gear rotation, allowing for precise control over fluid delivery by adjusting the gear speed. 

Advantages of Internal Gear Pumps 

• Viscosity Handling: Ideal for transferring high-viscosity fluids.  
• Versatility: Handles various viscosities and small solid particles.  
• Performance: Suitable for high-pressure and high-flow applications.  
• Adaptability: Functions well in challenging conditions like high temperatures and low Net Positive Suction Head (NPSH).  
• Self-Priming: Capable of frequent starts and stops.  
• Applications: Widely used in industries like asphalt production, chemical manufacturing, oil and gas, and food and beverage. 

Applications of Internal Gear Pumps   

• Asphalt & Bitumen Production: Effective in handling sticky substances in large-scale production.  
• Chemical Industry: Used for precise metering and transferring of ingredients.  
• Oil & Gas Sector: Reliable in high-pressure applications.  
• Food & Beverage: Ensures accurate transfer and metering of ingredients. 

Why buy internal gear pumps from AxFlow?   

AxFlow provides a diverse range of internal gear pumps tailored to various industries. Our experts offer comprehensive support, aiding in pump selection, specification, installation, and maintenance. Reach out to AxFlow for personalized guidance in choosing the ideal internal gear pump for your specific requirements.