External (Helical) Gear Pumps

Introduction to External Gear Pumps and Their Features

External gear pumps are a type of positive displacement pump that use two gears, an external driving gear and an internal driven gear, to create a pumping action. As the gears rotate, the fluid is carried between the teeth of the gears and the casing, creating a flow of fluid from the inlet to the outlet of the pump.

External gear pumps have a simple and robust design, making them a popular choice for a wide range of applications in various industries. In this article, we will provide an overview of external gear pumps, their features, and their applications.

The Working Principle of External (Helical) Gear Pumps

External gear pumps work on the principle of positive displacement, which means that a fixed amount of fluid is displaced with each rotation of the gears. The external gear is the driving gear and the internal gear is the driven gear. The two gears mesh together, and the fluid is carried between the teeth of the gears and the casing.

As the gears rotate, the volume of the fluid trapped between the teeth and the casing decreases, creating a vacuum that draws more fluid into the pump. This creates a continuous flow of fluid from the inlet to the outlet of the pump.

Features of External Gear Pumps

External gear pumps offer several features that make them a popular choice for various applications, including:

High Efficiency: The positive displacement principle of external gear pumps ensures that a consistent flow rate is maintained, even when pumping fluids with varying viscosities or densities. This makes them highly efficient, reducing energy consumption and operating costs.
High Pressure: External gear pumps are capable of producing high pressure, making them ideal for applications requiring high flow rates and pressure.
Versatility: External gear pumps are suitable for a wide range of fluids, including oils, fuels, chemicals, and other liquids.
Low Noise: The simple and robust design of external gear pumps results in low noise levels during operation.
Easy Maintenance: External gear pumps have a simple design with few moving parts, making them easy to maintain and repair.

Applications of External (Helical) Gear Pumps

External gear pumps are used in a wide range of industries and applications, including:

Automotive: External gear pumps are used in automotive applications for the transfer of engine oil, fuel, and other fluids.
Chemical Processing: External gear pumps are used in chemical processing applications for the transfer of acids, solvents, and other chemicals.
Food Processing: External gear pumps are used in the food processing industry for the transfer of viscous food products, such as chocolate, sauces, and syrups.
Pharmaceutical: External gear pumps are used in the pharmaceutical industry for the transfer of pharmaceutical products, such as vaccines, suspensions, and creams.
Lubrication: External gear pumps are used in lubrication systems for the transfer of oil and other lubricants.

Types of External Gear Pumps

There are two main types of external gear pumps, spur gear pumps and helical gear pumps. Spur gear pumps have straight teeth and are suitable for low-pressure applications, while helical gear pumps have angled teeth and are suitable for high-pressure applications.

VH Series Helical Gear Pump Types

External Gear Pumps in Turkey

External gear pumps are a reliable and versatile choice for various applications in different industries. Their high efficiency, high pressure capabilities, versatility, low noise, and easy maintenance make them a popular choice for pumping fluids of different viscosities and densities. If you are in need of an efficient and robust pump for your operations, consider Vimpo Pumps' range of external gear pumps.

VH SeriesExternal (Helical) Gear Pumps