Volumetric Pumps: Precision and Reliability in Industrial Dosing

Volumetric pumps are devices designed to move a defined volume of fluid with each operating cycle, offering consistent precision, repeatability, and flow control—even under demanding operating conditions. They are widely used in the chemical, pharmaceutical, food, and environmental industries, and in any application that requires accurate fluid handling.

Unlike centrifugal pumps, volumetric pumps do not rely on rotational speed to determine flow rate. Instead, flow is based on the geometric volume of the pumping chamber, making them ideal for viscous, sensitive, or particle-laden liquids.

Rotary Volumetric Pumps

Rotary volumetric pumps are a category of positive displacement pumps that use rotating elements to transfer fluid. Techma GPM offers the following solutions:

External Gear Pumps

These pumps use a pair of toothed gears to create sealed chambers that move the fluid from inlet to outlet. They offer:

• Constant and linear dosing
• High flow rates, even with viscous fluids
• Exceptional reliability and long service life
• Compact size and easy integration into existing systems

Discover our external gear pumps

Micro Volumetric Pumps

Micro annular gear pumps are the ideal solution for applications that require extreme precision at very low flow rates. Commonly used in laboratories, medical devices, and the dosing of reagents or high-value fluids, they offer:

• Ideal for microfluidics and analytical systems
• Repeatable microdosing down to a few µl/min
• Miniaturized components and ultra-tight tolerances

Discover our peristaltic pumps

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Peristaltic Pumps: A Versatile Volumetric Solution

Peristaltic pumps are also considered volumetric pumps, as they displace a fixed amount of fluid with each rotation of the rollers. The fluid is pushed through a flexible tube that is compressed by rotating rollers.

Advantages:

• No contact between fluid and mechanical parts
• Ideal for sensitive, sterile, or contaminable fluids
• Easy to clean – perfect for frequent product changeovers
• Low maintenance

These features make peristaltic pumps suitable for both food-grade and chemical/environmental processes.

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Volumetric vs. Centrifugal Pumps

Applications of Volumetric Pumps

• Dosing of additives, solvents, oils, and reagents
• Cosmetic and pharmaceutical industries
• Industrial washing systems
• Water treatment and environmental fluid handling
• Microfluidics and laboratory analysis

Frequently Asked Questions

→ What are volumetric pumps used for?

Volumetric pumps are used to dose or transfer fluids in a precise and consistent manner, even with dense, sensitive, or abrasive liquids. They are employed in many industries to ensure accurate flow control.

→ What are gear volumetric pumps?

These are rotary pumps that use gears to create constant-volume pumping chambers. They ensure a continuous, pulsation-free flow, ideal for precise and linear dosing.

→ How does a rotary volumetric pump work

A rotary volumetric pump uses rotating elements, such as gears or rotors, to create sealed chambers where fluid is trapped and mechanically pushed from inlet to outlet. Each rotation displaces a fixed amount of fluid, enabling precise, continuous dosing with low pulsation—ideal for viscous, sensitive, or abrasive fluids.

→ What is the difference between a centrifugal and a volumetric pump?

Volumetric pumps maintain a constant flow regardless of pressure, while centrifugal pumps have a variable flow depending on backpressure. Volumetric pumps are ideal for precision dosing; centrifugal pumps are better suited for high-volume, low-pressure applications.