What are the advantages of external gear pumps?

External gear pumps are ideal for a number of applications including those that require high precision and accuracy, such as when it comes to exact fluid dispensing or metering. Let’s look in detail at these advantages from the problem overview:

1. High Precision: External gear pumps can dispense fluids very accurately, which is useful for precise fluid metering and dispensing applications. The amount of liquid displaced by each revolution of the gears remains constant, leading to a predictable flow.
2. Suitability for High-Pressure Applications: These pumps withstand high pressures. They are built in such a way that they can handle stresses associated with operation under high pressure conditions. They are therefore ideal for hydraulic systems where there are demands for higher pressures.
3. Wide Range of Fluid Compatibility: A wide range of materials can be used to make external gear pumps which enable them to handle different types of fluids without being corroded or degraded in any way due to their versatility in pumping from thin solvents to viscous lubricants and even resistance against harsh chemicals or hygienic conditions relating to food and pharmaceuticals.
4. Ease of Maintenance: External gear pumps have fairly simple designs, making them easy to maintain. In many cases, the pump housing can remain in line while maintenance or repairs are performed keeping downtime at a minimum when replacing wear parts like gears, bearings, seals.
5. Constant and Smooth Flow:With the engagement and disengagement between teeth occurring continuously; external gear pumps ensure a steady flow with no pulsation or variation across time spans. This is important when dealing with smooth flow requirements necessary for system stability as well as protection of delicate parts from harm.
6. Self-Priming Capabilities: External gear pumps generally possess good self-priming capabilities; hence they function without manual priming by removing air from lines through drawing in fluids into pump systems.This feature becomes critical in automated processes.
7. Compactness & Efficiency: External gear pumps are characterized by their compactness and efficiency. Their small size is advantageous in situations where space is a constraint while their efficiency helps to save on energy.
8. No Pulsation or Shear Effects: The fluid flow in external gear pumps tends to induce minimal shear strains as compared to some other pump types. This has significance for shear-sensitive fluids such as some polymers or food products where preservation of the fluid’s composition is important.
9. Robust & Reliable Operation: External gear pumps are built to be tough thereby making them reliable when they are used. They can survive through continuous industrial operation, thus enhancing system reliability at large.
10. Versatile: Lastly, external gear pumps can be used for different purposes. They can be found in various industries including chemical, pharmaceutical and food companies which use them for material transfer, processing and packaging processes as well as mobile devices, hydraulics in industry and others.

To summarize, precision combined with pressure handling capabilities, fluid compatibility along with maintenance simplicity have made external gear pumps an attractive option for many industries and sectors. For simple or complex fluid handling needs they guarantee both constant flow rates under varying operating conditions.