Gear pumps Manufacturers online

Gear pumps are a special type of positive displacement pump that work to pump liquids through the mechanical interaction of rotating gears.

They are known for their efficiency, robustness and versatility and are used in many industrial applications.

Below you will find how they work, the different types of gear pumps, their areas of application and their advantages and disadvantages:

How they work:

Gear pumps mainly consist of two meshing gears mounted in a closed housing. There are different types, including internal gear pumps and external gear pumps.
When the gears rotate, a space is formed between the teeth of the gears, which fills with liquid on the suction side.
As the gears rotate, the trapped medium is transported from the suction side to the discharge side. The teeth of the gear wheels displace the liquid and push it through the outlet. The continuous rotation of the gears generates a uniform and pulsation-free flow rate. The pump uses seals to keep the medium inside and prevent liquid from escaping. These seals are crucial for the efficiency of the pump.

Use of gear pumps:

Gear pumps are versatile positive displacement pumps used in various industries and applications. Their functionality, robustness and ability to pump both thin and viscous media make them a popular choice.

1. Chemical and petrochemical industry:
Gear pumps are often used to handle aggressive chemicals, such as acids, alkalis and solvents. Their design enables safe and precise pumping of these substances.
In the oil and gas industry, gear pumps are used to pump crude oil, fuel oil, gasoline and other refined products. They can also be used to return high-pressure fluids to wells.
In the production of paints and varnishes, gear pumps are ideal for evenly conveying and mixing viscous materials.

2. Food and beverage industry:
Food safety: In the food industry, pumps must comply with strict hygiene regulations. Gear pumps made of food-safe materials are designed to work hygienically and are easy to clean.
They are often used to pump edible oils, fats and margarine, as these media are viscous and require uniform dosing.
In the beverage industry, gear pumps are used for pumping syrups, fruit juices and other liquid ingredients during filling and processing.

3. Pharmaceutical industry
Gear pumps are used in pharmaceutical production for the precise dosing of liquids, whether in the production of solutions or in filling.
Gear pumps are used in the production of ointments, gels and other viscous pharmaceutical products to ensure a homogeneous mixture.

4. Automotive industry:
Gear pumps are often used in automotive engines and transmissions to deliver lubricants. They ensure an even distribution of lubricating oil to protect the engine and increase efficiency.
They are used in fuel pumps to ensure that fuel is delivered evenly and reliably to engines.

5. Construction and site applications:
In the construction industry, gear pumps are also used to pump viscous materials such as mortar and concrete to ensure a smooth flow of materials on the construction site.

6. Water and wastewater management:
Gear pumps can also be used in the wastewater industry to pump viscous wastewater. Their ability to handle solid particles makes them suitable for these applications.

7. Plastics and rubber industry:
In plastics processing, gear pumps are used to handle polymer dispersions and melts to ensure consistent pumping and processing.

8. Power plant technology:
In power plants, gear pumps are used to transfer coolants and lubricants to optimize operating conditions and improve machine efficiency.

Advantages of gear pumps:

• Gear pumps are mechanically simple, durable and suitable for handling various fluids, including viscous media.
• They provide precise metering and are ideal for applications that require an exact amount of fluid.
• They can be used in a variety of applications, including the transfer of lubricants, oils, chemicals and other fluids.
• Delivery is continuous and consistent, which is beneficial in many applications.

Disadvantages of gear pumps:

• Gear pumps can be damaged by solid particles in the fluid being pumped, which limits their use in dirty or solids-laden applications.
• With extremely viscous liquids, efficiency can decrease and special gear pumps are required.
• At high speeds, overheating can occur, which can affect performance.

Gear pumps are essential in many industries and applications due to their versatility, robustness and ability to deliver a precise flow rate. They offer a reliable solution for pumping a wide range of fluids, especially in applications that require a constant and consistent flow rate.

Here you will find an overview of the most important criteria to look out for when purchasing gear pumps:

When purchasing gear pumps, it is important to conduct a thorough analysis of the specific requirements of the application. Since gear pumps are used in a variety of industries and applications, various factors can influence the selection.

• Determine the viscosity of the medium to be pumped. Gear pumps can operate in a wide viscosity range, but the specific design of the pump (e.g. gear size, geometry) should be adapted to the viscosity.
• Internal gear pumps: These pumps have an inner and an outer gear wheel, with the inner gear wheel rotating eccentrically in the outer gear wheel. They are well suited for viscous and abrasive media.
• External gear pumps: These consist of two gears that mesh together and transport the liquid through their rotation. These are ideal for low to medium viscosity applications.
• Adjustable volume gear pumps: These pumps offer the possibility of varying the delivery volume by adjusting the distance between the gears. They are particularly useful when the flow rate needs to be variable.
• If the medium contains abrasive particles, you should choose a pump that is made of wear-resistant materials (e.g. hardened steel) to extend the service life of the pump.
• For aggressive chemicals, it is important to choose materials that are resistant to chemicals. Stainless steel or special plastics such as PTFE are common choices.
• Consider how much liquid needs to be pumped per unit of time (e.g. in liters per minute). The pump must be able to pump this amount efficiently.
• Gear pumps are known for their ability to generate high pressures. Make sure that the selected pump is suitable for the required operating pressures. check the maximum operating and pressure values to ensure that they meet your requirements.
• Consider the temperature of the pumped liquid and ensure that the pump and its materials are suitable for these temperatures. Special seals and materials may be required for high temperatures.
• The housing should be made of corrosion-resistant materials that are suitable for the pumped medium. common materials are stainless steel, cast iron or special alloys.
• The choice of seals is crucial to prevent leakage. Look for high-quality seals that are suitable for the specific medium and operating temperature.
• Consider what type of actuator is required (e.g. electric motor, pneumatic actuator). The drive should be suitable for the application and the local conditions.
• Check whether the pump can be equipped with a frequency converter or other control mechanisms to adjust the flow rate.
• Choose a pump that is easily accessible for maintenance work. Pumps where wearing parts can be replaced quickly save time and money.
• Find out about the availability of spare parts and whether the manufacturer offers good support.
• Pay attention to the energy efficiency of the pump. Efficient pumps reduce operating costs over their service life. Also consider the pump performance in relation to the flow rate generated.
• Ensure that the pump complies with the relevant standards and regulations (e.g. ATEX for potentially explosive atmospheres, FDA for food applications).
• Special hygiene standards are required in the food and pharmaceutical industries. Look for certificates such as EHEDG or other relevant approvals.
• Consider the initial costs of the pump, but also the total costs over the service life (maintenance, operation, energy).
• Carry out a cost-benefit analysis to find the most economical solution that meets your requirements. A more expensive pump may be more cost-effective in the long run if it is more durable and easier to maintain.

Choosing the right gear pump requires a thorough analysis of the specific requirements of your application. By considering the above factors, you can select a pump that not only operates efficiently, but is also reliable and cost-effective in the long term. Careful planning and selection will ensure that your processes run smoothly and that you get the best possible performance from your gear pump.

Gear pumps can be purchased from various suppliers. Comprehensive information about manufacturers and suppliers of Gear pumps from all over the world can be found on Exportpages.