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KRAL GmbH
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Magnetic drive pumps
KRAL screw pumps with magnetic coupling from the manufacturer.
Magnetic drive pumps offer an excellent solution for applications where absolute tightness and reliability are required. These pumps are specially designed to prevent leaks as they do not require mechanical seals. Instead, magnetic couplings transmit torque without contact and are hermetically sealed. Also known as magnetically coupled pumps or magnetic drive pumps, they work particularly reliably with demanding media.
Our magnetic drive pumps are characterized by their high efficiency and durability. They are ideal for use in demanding environments such as the marine, chemical and petrochemical industries. The construction from robust materials ensures that the pumps function perfectly even under extreme conditions. A pump with a magnetic drive is particularly useful where tightness and operational reliability are crucial.
Our magnetic drive pumps are characterized by their high efficiency and durability. They are ideal for use in demanding environments such as the marine, chemical and petrochemical industries. The construction from robust materials ensures that the pumps function perfectly even under extreme conditions. A pump with a magnetic drive is particularly useful where tightness and operational reliability are crucial.
Another advantage of magnetic drive pumps is their ease of maintenance. Since no seals can wear out, maintenance costs and intervals are significantly reduced. This leads to increased uptime and lower total cost of ownership.
Our engineers have developed these pumps to meet the highest safety standards. The hermetically sealed design prevents the leakage of hazardous or valuable liquids, protecting both the environment and operational safety.
The versatility and reliability of magnetic drive pumps make them the first choice for many industries. They offer a reliable and efficient solution for all applications where tightness and reliability are top priorities.
Our engineers have developed these pumps to meet the highest safety standards. The hermetically sealed design prevents the leakage of hazardous or valuable liquids, protecting both the environment and operational safety.
The versatility and reliability of magnetic drive pumps make them the first choice for many industries. They offer a reliable and efficient solution for all applications where tightness and reliability are top priorities.
KRAL - Your expert for magnetic 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.
Features and advantages of our magnetic drive pumps.
- Flow rates: 5 to 3,500 l/min.
- Max. Differential pressure: 100 bar.
- Temperature range: -20 °C to 300 °C.
- Housing: Nodular cast iron EN-GJS-400, steel and aluminum.
- Spindles: Nitrided steel.
- Acceptances: ABS, BV, CCS, DNV, LRS, MRS, NK, RINA, KR.
- ATEX: II 2 GD b/c group II, category 2.
- Heating: Electric, medium or steam.
Leak-free and clean.
Pumped liquids containing substances that are potentially hazardous to health or the environment must not be allowed to escape into the open. KRAL screw pumps with magnetic coupling offer a hermetically sealed solution thanks to the integrated containment shroud, unlike conventional seals. This ensures that neither people nor the environment are endangered.
Our pumps are characterized by their reliability and longevity, which leads to a reduction in maintenance and operating costs. The hermetically sealed design effectively prevents any leaks, which increases operational safety and prevents environmental damage.
Our pumps are characterized by their reliability and longevity, which leads to a reduction in maintenance and operating costs. The hermetically sealed design effectively prevents any leaks, which increases operational safety and prevents environmental damage.
Can be used up to 300 °C.
Thermally induced deformations and the temperature limits of elastomer seals limit the use of screw pumps at high temperatures. For media with temperatures of up to 300 °C, KRAL screw pumps with magnetic coupling offer an ideal solution.
Our magnetic drive pumps are specially designed for use at extreme temperatures. By dispensing with elastomer seals and using magnetic coupling technology, deformation can be avoided and maximum operational reliability guaranteed. This leads to a significantly increased service life and reliability of the pump, even under demanding conditions.
Our magnetic drive pumps are specially designed for use at extreme temperatures. By dispensing with elastomer seals and using magnetic coupling technology, deformation can be avoided and maximum operational reliability guaranteed. This leads to a significantly increased service life and reliability of the pump, even under demanding conditions.
Reduced life cycle costs.
Spare parts and maintenance costs for mechanical seals significantly increase life cycle costs. Although the mechanical seals in KRAL screw pumps have a high technological standard and work reliably even when operated properly, they still remain a wearing part.
KRAL screw pumps with magnetic coupling offer an efficient solution here. Thanks to the use of the magnetic coupling, our pumps are completely maintenance-free. This means that no regular maintenance or expensive spare parts are required, which leads to a significant reduction in life cycle costs.
KRAL screw pumps with magnetic coupling offer an efficient solution here. Thanks to the use of the magnetic coupling, our pumps are completely maintenance-free. This means that no regular maintenance or expensive spare parts are required, which leads to a significant reduction in life cycle costs.
Protection of the pumped liquid.
KRAL magnetic drive pumps offer numerous advantages for demanding applications. One outstanding advantage is the protection of the pumped medium. With conventional seals, oxygen from the atmosphere can diffuse through the sealing gap into the pumped medium. This can lead to the pumped media crystallizing and no longer being able to be processed, which can result in costly system downtime.
Our magnetic drive pumps are hermetically sealed, preventing oxygen from entering the system. This preserves the quality of the pumped liquid and increases operational safety. The hermetic seal also ensures clean and reliable pumping without the need for expensive and time-consuming maintenance.
Our magnetic drive pumps are hermetically sealed, preventing oxygen from entering the system. This preserves the quality of the pumped liquid and increases operational safety. The hermetic seal also ensures clean and reliable pumping without the need for expensive and time-consuming maintenance.
Favorable price.
Our magnetic drive pumps are characterized by an optimized design that efficiently transmits high torques without the need for large or expensive magnets. Thanks to this technical innovation, we can offer you high-quality screw pumps at an attractive price-performance ratio.
When developing our new generation of screw pumps, we focused on perfect coordination between the pump and the magnetic coupling. This precise coordination enables us to utilize the advantages of a magnetic coupling without driving up costs. As a result, our pumps are not only powerful and reliable, but also cost-efficient.
When developing our new generation of screw pumps, we focused on perfect coordination between the pump and the magnetic coupling. This precise coordination enables us to utilize the advantages of a magnetic coupling without driving up costs. As a result, our pumps are not only powerful and reliable, but also cost-efficient.
Protection against overload.
Our API screw pumps with magnetic coupling offer optimum protection against overload. If the operating limits are exceeded, the pump can be damaged. Solids in the liquid often lead to blockages that damage the spindles and housing. It is then often necessary to replace the pump.
Thanks to our innovative magnetic coupling, the pump remains undamaged even in the event of an overload. The magnetic coupling safely disconnects the pump from the drive side as soon as there is a risk of overload, preventing expensive consequential damage. This disengagement is monitored by the system and switches the pump off in good time. This keeps both the screw pump and the magnetic coupling intact.
Thanks to our innovative magnetic coupling, the pump remains undamaged even in the event of an overload. The magnetic coupling safely disconnects the pump from the drive side as soon as there is a risk of overload, preventing expensive consequential damage. This disengagement is monitored by the system and switches the pump off in good time. This keeps both the screw pump and the magnetic coupling intact.
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Hermetically sealed.
The containment shroud is the sealing element of the KRAL pump. It sits like a seal over the pump shaft with internal rotor.
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The function.
The torque of the electric motor is transmitted contactlessly to the pump spindles by the magnetic coupling. For this purpose, the electric motor shaft and the pump shaft each have a rotor with several magnets. The two rotors rotate synchronously out of phase during operation.
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No fuel residues.
Due to the sealed magnetic coupling, the fuel has no contact with the air. The heavy oil cannot react with oxygen and form coking, which damages the ball bearing. This eliminates a major cause of pump failure.
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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.
Advantages of our magnetic drive pumpsat a glance.
- Hydraulic oil can be pumped over a long period of time without exposure to air
- Conveying of large quantities with low space requirements
- Linear or axial delivery
- High efficiency
- Hardly any heat input and few return flows
- Covers a wide viscosity range
- Very quiet
- Minimal wear
- Very easy to maintain and durable
- Preserves the quality of the oil
- DIN standard 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 hydraulic pumps
Hydraulic pumps for thermal power plants
Hydraulic pumps from KRAL are specially designed to meet the high demands of thermal power plants and ensure reliable and efficient performance. Our robust screw pumps handle high-temperature fluids with ease and offer outstanding durability. Thanks to precise manufacturing techniques, they achieve optimum energy efficiency and help to reduce operating costs. The ease of maintenance and simple handling of our pumps reduce downtime and increase the productivity of your systems.
Hydraulic pumps for hydropower plants
Our robust screw pumps ensure continuous and low-maintenance operation, even under the most demanding conditions. They are specially designed to meet the high pressure requirements and variable flow rates of hydropower plants. With precise manufacturing technology, we offer solutions that are characterized by high energy efficiency and durability.
Hydraulic pumps as shaft lifting pumps.
KRAL magnetic drive pumps are the ideal choice for power plant construction as circulation pumps for fuel. Thanks to their hermetically sealed design, they offer absolute safety against leaks and maximum reliability. The pumps ensure efficient and trouble-free circulation, even under extreme conditions. Their low-maintenance properties reduce operating costs and downtime. Rely on the proven quality and performance of our pumps with magnetic coupling for your fuel circulation applications.
Hydraulic pumps for wind turbines.
Our screw pumps offer reliable and efficient energy transfer, even under extreme conditions. With innovative technology and precise design, we maximize the efficiency of the generator in various weather scenarios.
Other areas of application for magnetic drive pumps.
- Rudder adjustment.
- Propeller blade adjustment.
- Hydraulic drives.
- Power supply to the hydraulic drive.
- Turbine bearing lift.
- Hydraulic pumps for plant construction.
- Load handling.
- Rotor lifting.
Do you have any questions about
Magnetic drive pumps
Just send us a short message and we will be happy to answer any questions you may have.
Technical data of our magnetic drive pumps
DKC / DLC / DS/L series
DKC series.
DLC series.
DS/L series.
MAG series
EK / EL serie
EK series.
EL series.
L series
C series
CK series
CL series
CG series
K series
Z series
F 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.
