Pumps - Gear pump
Gear pumps deliver liquids precisely and evenly. They are used in laboratory processes for fluid transfer at medium pressures.
Product
Pumps - Gear pump
Gear pumps deliver liquids precisely and evenly. They are used in laboratory processes for fluid transfer at medium pressures.
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Milian SA
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Guide and selection support
Gear pumps are preferred for continuous and low-pulsation transfer of liquids in laboratory and process systems. They are especially suitable for applications involving medium pressures up to about 200–300 bar, such as in hydraulic systems.
Key selection criteria include flow rate, maximum operating pressure, and the fluid to be pumped. Additionally, material compatibility and operating conditions are crucial factors.
LabFinder offers an overview of relevant gear pumps for laboratory applications and assists in choosing the right models for precise liquid handling in lab environments.
Applications and Benefits
Gear pumps are used in laboratory settings for delivering liquids and for power transmission to hydraulic motors. They are characterized by relatively constant flow rates, only affected by hydrostatic pulsations. Common application areas include process control and automation, where precise and reliable media transfer is required. The pumps can generate medium pressures of about 200 to 300 bar by delivering fluid against a defined resistance.
Selection Criteria
Important factors when selecting a gear pump are flow rate, pressure requirements, and compatibility with the fluid to be conveyed (e.g., viscosity, chemical compatibility). Other considerations include operating conditions such as temperature, as well as the pump design in terms of maintenance and service life. The choice may also be influenced by advice on low-pulsation models and potential integration into automated process systems.
Types and Designs
Gear pumps differ mainly in their design, such as internal or external gear configurations, as well as the materials used for rotors and seals. These variants adapt to different fluid types and requirements. The operating principle is based on displacement, where two intermeshing gears pick up and convey the fluid.
Calibration and Maintenance
Regular maintenance includes inspection of seals, lubrication of bearings, and monitoring of gear wear. Monitoring flow rate and pressure can indicate wear or malfunction. Appropriate testing and calibration methods support permanent, consistent flow rates and maintain system integrity.
Limitations in Application
Gear pumps are less suitable for abrasive or highly particle-laden media, as wear increases in these conditions. Highly foaming or gas-laden fluids can also affect pump performance. For extremely high pressures or particularly sensitive media, other pump types may be more appropriate.
Search Terms and Related Terms
Synonyms and common search terms include gear pump, hydraulic gear pump, gear displacement pump, and liquid gear pump. Key related categories are flow meters, as these are often used alongside gear pumps for process monitoring.
Also known as
Displacement gear pump
Gear displacement pump
Gear pump
Gear pumps
Hydraulic gear pump
Liquid gear pump
Related categories
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Frequently asked questions
How does a gear pump work?
A gear pump transfers liquids by using two interlocking gears to draw fluid from the inlet chamber and move it through displacement to the pressure side. This creates an almost steady flow with minimal pulsation.
What types of gear pumps are there?
The primary distinction is between internal and external gear pumps, each suited to different fluids and flow requirements. The choice of material and design depends on pressure, medium, and application conditions.
What criteria are important when selecting a gear pump for the laboratory?
Key factors include flow rate, required pressure, chemical compatibility with the medium, and expected operating conditions. Ease of maintenance and compatibility with process controls also play a role.
What media can be conveyed with gear pumps?
Gear pumps are suitable for liquids of varying viscosities that do not contain abrasive particles. They are less appropriate for highly foaming, gas-laden, or strongly abrasive substances.
How is maintenance carried out on gear pumps?
Maintenance involves checking and, if necessary, replacing seals, lubricating bearings, and inspecting gears for wear. Regular monitoring of flow performance supports reliable operation.
For suppliers and service companies
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