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KRAL GmbH
Bildgasse 40 Industrie Nord 6890 Lustenau
Circulation pumps
KRAL screw pumps from the manufacturer for circulation applications.
Circulation pumps from KRAL offer reliable and efficient solutions for a wide range of industrial applications. Their robust design and high performance make them particularly suitable for use in closed circuits where a continuous flow of liquid is required. Our circulation pumps are characterized by low noise and low energy consumption, resulting in improved operational efficiency and cost savings.
The innovative screw spindle technology ensures smooth and pulsation-free operation, resulting in longer equipment life and less maintenance. Thanks to their high precision and reliability, our circulation pumps are ideal for applications in heating and air conditioning technology, the chemical industry and in food and beverage production.
The innovative screw spindle technology ensures smooth and pulsation-free operation, resulting in longer equipment life and less maintenance. Thanks to their high precision and reliability, our circulation pumps are ideal for applications in heating and air conditioning technology, the chemical industry and in food and beverage production.
KRAL circulation pumps are available in various designs and sizes to meet the specific requirements of our customers. Each pump is manufactured from high-quality materials and undergoes strict quality controls to ensure the highest standards. With user-friendly operation and flexible installation options, our pumps are easy to integrate into existing systems and offer an optimal solution for efficient circulation processes.
KRAL - Your expert for pump technology.
"Quality, innovation and speed, at all times and worldwide."
Since the company was founded, KRAL has positioned itself as a manufacturer of quality products at a fair price/performance ratio, offering customized solutions for systems, from engineering to commissioning, both locally and worldwide. Our after-sales service is also there for you after your purchase.
Convince yourself of our services. We are here for you.
Convince yourself of our services. We are here for you.
Advantages of our circulation pumps.
Our circulation pumps are characterized by a number of advantages that make them the ideal choice for a wide range of applications. Find out more about the outstanding features that make our pumps particularly efficient, durable and user-friendly:
- Outstanding energy efficiency.
Our circulation pumps are designed to minimize energy consumption while delivering optimum performance. By using the latest technologies and materials, we ensure that our pumps work efficiently and thus reduce operating costs. This not only helps to save costs, but also to protect the environment.
- Durability and reliability.
The design of our circulation pumps is based on high-quality materials and precise workmanship. As a result, they offer an exceptionally long service life and reliable operating times. Even under the most demanding operating conditions, our pumps maintain their performance and efficiency.
- Quiet operation
Another advantage of our circulation pumps is their extremely quiet operation. Thanks to careful design and the use of advanced technologies, our pumps generate only minimal noise emissions. This ensures a more pleasant working environment and avoids noise pollution in sensitive areas.
- Easy installation and maintenance.
Our circulation pumps are designed to be easy to install and maintain. Thanks to their compact design and clearly structured components, they can be easily integrated into existing systems. In addition, modular designs and accessible maintenance points make servicing easier and reduce downtime.
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Flexible connections
If the outer casing of the screw pump is made of steel, almost any position, direction, size, type and classification of the flange is possible. It can be optimally adapted to any installation situation.
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Housing variants
Depending on the operating requirements, the CG series screw pumps are available with cast iron or steel housings.
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External overflow valve
The overflow valve ensures that the liquid is diverted in the event of overpressure.
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Rotary shaft seal
The CK series screw pump is only available with a radial shaft seal. The CL series screw pump can be equipped with different shaft seals thanks to the longer spindle set. External ball bearings are also possible. This pump line is used as a horizontal or vertical foot pump or flange pump as well as a vertical container pump.
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Seal housing
Depending on the operating requirements, different shaft seals are possible for the CL series. The CL screw pump is the slide-in pump used in the CG series. The different housing options allow enormous flexibility in terms of fluid connections. An optional external overflow valve can be fitted to CG screw pumps.
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Longer spindle set
Thanks to the longer spindle set, external ball bearings are also available as an option.
Advantages of our circulation pumps at a glance.
- Reduced energy consumption, lower operating costs.
- Conveying large quantities with low space requirements.
- Linear or axial conveying.
- High efficiency.
- User-friendly design.
- Flexible in various applications.
- Very quiet.
- Minimal wear.
- Very easy to maintain and durable.
- DIN standardization.
Do you have any questions? - We will be happy to help you!
We and our independent sales and service partners are available to you worldwide at any time.
Please contact us by phone or e-mail or use our inquiry form and we will get back to you shortly.
Please contact us by phone or e-mail or use our inquiry form and we will get back to you shortly.
Areas of application for our circulation pumps.
Circulation pumps for booster modules.
Our circulation pumps for booster modules are specially designed to keep the pressure stable in complex systems. They ensure a constant and reliable supply of fluids, which increases the efficiency and performance of the entire module. Thanks to their robust design and high performance, they are ideal for industrial applications where continuous delivery is crucial.
Circulation pumps for lubrication systems.
The circulation pumps for lubrication systems from KRAL ensure optimum lubrication of machines and systems. They deliver lubricants continuously and evenly, which extends the service life of machine components and reduces their maintenance requirements. With high precision and reliability, our pumps help to ensure the smooth operation of your machines.
Circulation pumps for separators.
Our circulation pumps for separators are designed to maximize the efficiency and performance of separation processes. They support the continuous circulation of liquids, enabling effective separation and cleaning. With their high reliability and long service life, our pumps offer a cost-effective solution for a wide range of industrial separation processes.
Circulation pumps as sealed oil pumps.
The reliable supply of sealing oil for the rotating shafts of hydrogen-cooled generators is best achieved using KRAL screw pumps in a three-spindle design. Depending on the system requirements, we recommend the K, L or C series. These solutions are characterized by reliable start-up, minimized wear and high ease of maintenance. Our sealing oil pumps guarantee a constant supply of sealing oil, which significantly increases the operational reliability and efficiency of your generators.
Do you have any questions about
Circulation pumps
Just send us a short message and we will be happy to answer any questions you may have.
Technical data of our circulation pumps.
L series
Z series
K series
G series
The KRAL G series is an industrial-grade solution for pumping lubricants. The pumps are available in six sizes and therefore cover a wide performance spectrum. The low-maintenance operation is a significant advantage for continuous use.
The pumps work reliably at viscosities of up to 500 mm²/s and temperature ranges from -10 to 120 °C, optionally even up to 300 °C. The compact design allows use in space-critical applications. All housing parts can be mounted in 90° steps.
Numerous options - from cartridge seals to tank installation variants - make the series extremely adaptable. The ATEX and API 676 approvals also enable use in international projects with high safety and standard compliance requirements.
The pumps work reliably at viscosities of up to 500 mm²/s and temperature ranges from -10 to 120 °C, optionally even up to 300 °C. The compact design allows use in space-critical applications. All housing parts can be mounted in 90° steps.
Numerous options - from cartridge seals to tank installation variants - make the series extremely adaptable. The ATEX and API 676 approvals also enable use in international projects with high safety and standard compliance requirements.
C series
CK series
CL series
CG series
W series
| Technical data | 15-26 | 32-54 | 55-85 | 105-118 | |
|---|---|---|---|---|---|
| Qth (1450 min-1, 0 bar) | l/min | 15-26 | 32-54 | 55-85 | 105-118 |
| Max. Pressure flange | bar | 120 | 120 | 120 | 120 |
| Temperature max. pumped liquid | °C | ||||
| with radial sealing ring NBR | 90 | 90 | 90 | 90 | |
| with radial sealing ring FKM | 150 | 150 | 150 | 150 | |
| with mechanical seal standard | 150 | 150 | 150 | 150 | |
| with mechanical seal hard material | 180 | 180 | 180 | 180 | |
| Magnetic coupling | 300 | 300 | 300 | 300 | |
| Viscosity | mm²/s | ||||
| min. | 1 | 1 | 1 | 1 | |
| max. | 100000 | 100000 | 100000 | 100000 | |
| Max. Pressure suction flange | bar | ||||
| with radial sealing rings | 6 | 6 | 6 | 6 | |
| with mechanical seal standard | 6 | 6 | 6 | 6 | |
| with mechanical seal hard material | 6 | 6 | 6 | 6 | |
| Magnetic coupling | 6 | 6 | 6 | 6 |
DKC / DLC / DS/L series
DKC series.
DLC series.
DS/L series.