Why most of the industries use gear pumps instead of centrifugal pumps?

On the other hand, the choice between gear pumps and centrifugal pumps in industrial applications relies on a number of factors such as the type of fluid to be pumped, desired flow rate, pressure requirements, and general operation. Nonetheless due to their specific benefits, gear pumps often win out in some industries.

1. Positive Displacement: Gear pumps are positive displacement pumps so they can pump fluids at a constant rate regardless of outlet pressures. Consequently this allows for more accurate control over flow rates which is often critical especially in chemical processing industries like petrochemicals and pharmaceuticals.
2. Handling High-Viscosity Fluids: Gear pumps are particularly useful for pumping high viscous liquids such as oil and resins. They can handle these fluids much better than centrifugal pumps which are usually more suitable for low-viscosity ones such as water.
3. Self-Priming: Gear pumps have self-priming ability making it possible to create adequate vacuum that pulls fluid into the pumping chamber something that centrifugal would not do. This is important when dealing with starting stopping or intermittent service or where entrained gases are present in the fluid being pumped.
4. Energy Efficiency: In higher pressure applications, gear pumps tend to be more energy efficient compared to centrifugal ones since low flow rates or high pressures significantly reduce the efficiency of centrifugal ones making gear ones preferable options under such conditions.
5. Simplicity and Reliability: Gear pumps have simpler mechanical constructions hence lower initial costs great maintenance prospects and high reliability. The simplicity in design makes them less susceptible to mechanical breakdowns than complex centrifugal systems.
6. Limited Shear: In shear-sensitive industries like food processing and paint manufacturing where maintaining fluid integrity is crucial; gear pumps produce less shear than does a positive displacement pump.
7. Pulseless Flow: Continuous engagement of gears ensures smooth pulsation free flows that are advantageous for processes requiring uniform delivery of fluids
8. Versatility: As long as solids within them are not abrasive; those with solid components like gear pumps can pump a wide range of fluids. They are employed in many different industrial environments because they have compatibility with diverse liquids.

However, there are some advantages to centrifugal pumps. These are frequently more suitable for high-flow/low-pressure applications and are often made from the proper material to withstand corrosive materials when handling them. In addition, they tend to be less expensive for large volumes of low-viscosity fluid handling which makes them popular in water treatment, HVAC systems and certain aspects of the petrochemical industry.

In conclusion, gear pumps find favor in many industries because of their versatility, ability to handle highly viscous or shear sensitive fluids, self-priming properties and constant flow delivery. These features enable them to meet specific demands from different industrial operations hence being widely used.