Positive displacement pumps

KAMAT is an expert when it comes to positive displacement pumps in the industrial sector. Our advanced positive displacement pumps are at the heart of efficient and reliable processes in numerous industrial sectors. With a combination of innovative technology, robust design and customised functionality, our pumps offer unrivalled performance tailored specifically to the needs of demanding industrial applications.

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The basic function of a positive displacement pump is to contain a certain amount of the medium to be pumped – be it liquid or gas – in a chamber and to move it from an inlet to an outlet by mechanical movement (e.g. turning or pushing). This process is achieved by various mechanisms, such as pistons, diaphragms, screws or gears. These mechanisms periodically increase the volume in the chamber (to draw in the medium) and then reduce it (to displace it). When the displacement is achieved by a plunger, the pumps are also called plunger pumps.

1. Suction phase: The displacer (e.g. a piston or plunger) in the pump retracts, creating a vacuum and drawing the medium into the chamber through the inlet valve.
2. Displacement phase: The displacer moves forwards, reducing the volume of the chamber and increasing the pressure inside.
3. Discharge phase: The increased pressure forces the medium out of the chamber through an outlet and into the pipe system or a container.
4. Return to initial state: The displacer returns to its starting position to repeat the cycle.

Due to their efficiency and precision, positive displacement pumps are indispensable in a variety of industries. Some of the most common areas of application are:

• Industrial cleaning
• Mining
• Shipyards
• Construction
• chemical industry
• Aquaculture
• Oil and gas industry
• Process technology

Positive displacement pumps are a class of pumps that displace liquids or gases by periodically increasing and decreasing the volume of an enclosed space. They are classified into

• oscillating (e.g. piston or diaphragm pumps)
• rotating (e.g. gear or rotary lobe pumps)
• and a combination (e.g. radial piston pumps).

A very well-known type of positive displacement pump is the plunger pump. Plunger pumps use a plunger that moves back and forth in a cylinder. The reciprocating motion of the plunger, which is often made of ceramic, draws liquid into the cylinder, which is then expelled by the movement of the plunger towards an outlet valve, compressing the liquid by reducing the volume of the cylinder. Plunger pumps are not used for gases, as these generally have a larger free space.

Positive displacement pumps are known for their ability to move precise volumes of liquid in a variety of industries. These pumps are ideal for applications that require precise flow control.

Reciprocating pumps are a key category of positive displacement pumps specifically designed for precise fluid transfer. These pumps use one or more pistons that move back and forth in cylinders. This movement creates a vacuum that draws in the liquid, which is then pushed through the outlet as it is withdrawn. This mechanism enables extremely precise control over the volume pumped. Reciprocating pumps are particularly effective when handling highly viscous liquids and can generate extremely high pressures. Their robust design ensures durability and reliability even under demanding operating conditions. Their adaptability makes them ideal for a wide range of industrial applications, including the chemical and food industries, where precise metering and handling of viscous products is required.

Diaphragm pumps are characterized by a flexible diaphragm that moves rhythmically up and down, forcing the liquid through the pump. This pump technology is particularly advantageous when handling corrosive or abrasive media, as the liquid is completely isolated from the mechanical parts. This prevents abrasion and increases the service life of the pump. Diaphragm pumps are therefore ideal for use in chemical processing, water treatment and other industries where clean and contamination-free processes are critical. Their ease of maintenance and ability to run dry without damage make them a popular choice in many industrial applications.

Screw pumps use two precisely intermeshing screws to deliver media continuously and evenly. This type of pump is particularly known for its ability to produce a pulsation-free flow, making it ideal for applications where vibration and pulsation are undesirable, such as in food processing or the pharmaceutical industry. Their design allows them to efficiently move both low and high viscosity fluids, further increasing their versatility and popularity. Screw pumps are also known for their durability and low maintenance requirements, making them a cost-effective solution in many industrial processes.

Gear pumps are known for their robustness and reliability, making them suitable for a wide range of industrial applications. These pumps work with two or more gears that mesh together to transport liquids. The gear pump is particularly effective when handling different viscosities, from thin to very thick media. Their design enables a smooth, efficient flow without turbulence, making them ideal for precise dosing and pumping tasks. Their ease of maintenance and high performance make gear pumps a preferred choice in the chemical, petrochemical and food industries.

Gerotor pumps use an internal gear design where an outer gear drives the inner gear, which is positioned eccentrically. This design provides a smooth, even flow that is ideal for lubricant applications and hydraulic systems. Their compactness and efficiency in low to medium pressure ranges make them popular in the automotive industry and in machines that require precise fluid handling.

Peristaltic pumps offer gentle and sterile fluid handling as the fluid only comes into contact with a flexible tube that is compressed by rollers. These pumps are ideal for sensitive media such as in biotechnology and medical applications as they prevent contamination and are easy to clean. Their precision and reliability are particularly appreciated in food processing and pharmaceutical production.

Vane pumps work with a rotating disk in an oval housing, with several movable vanes in radial slots varying the volume. They are particularly suitable for medium pressures and are characterized by their ability to handle a wide range of liquids. Their adaptability makes them useful in many industries, including the automotive and aerospace industries.

Here at KAMAT, the specialist for high-pressure technology, we understand that every industry has its own challenges and requirements. That’s why we offer a wide range of positive displacement pumps suitable for a variety of applications – from the chemical and process industries to mining and construction. Discover how our positive displacement pumps can help boost your productivity and reduce operating costs while ensuring the highest safety standards.

Find out how we can revolutionise your industrial processes with tailor-made solutions and first-class service.

Positive displacement pumps by KAMAT stand for innovation and quality, specially tailored to the demanding needs of industry. Here are some of the key benefits that make KAMAT high-pressure pumps a preferred choice in various industries:

• High efficiency and precision: the KAMAT positive displacement pumps are known for their high delivery accuracy. They enable precise control of flow and pressure, which is crucial in processes that require accurate dosing.
• Robustness and durability: The pumps are known for their robust design and ability to operate reliably even in harsh conditions. They can withstand corrosive, abrasive or highly viscous media, ensuring a longer service life and lower maintenance costs.
• Flexibility in applications: KAMAT has a wide range of positive displacement pumps suitable for a wide variety of requirements. From the chemical and food industry to mining and the oil and gas industry, KAMAT offers customised solutions for various industrial requirements.
• Customised service and support: KAMAT offers outstanding customer service. From advice and customisation of pumps to after-sales service and technical support worldwide, KAMAT provides excellent support for its customers.

This combination of performance, reliability and customer-orientation makes KAMAT positive displacement pumps the ideal solution for industrial companies looking for high-quality and efficient pump systems.