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At any time and worldwide
KRAL GmbH
Bildgasse 40 Industrie Nord 6890 Lustenau
Ship pumps
KRAL screw pumps from the manufacturer for the marine industry.
KRAL is your reliable partner for marine pumps that offer maximum efficiency and reliability. Our specially designed screw pumps for marine applications guarantee first-class performance under the most demanding conditions.
We also offer suitable solutions for potentially explosive zones on board - such as our EX pumps for ships, which have been specially developed for safe use with flammable media.
With many years of experience and technical expertise, we develop solutions that meet the high requirements of the shipping industry. Our marine pumps are characterized by their durability, ease of maintenance and outstanding energy efficiency, resulting in reduced operating costs and a longer service life for your systems.
We also offer suitable solutions for potentially explosive zones on board - such as our EX pumps for ships, which have been specially developed for safe use with flammable media.
With many years of experience and technical expertise, we develop solutions that meet the high requirements of the shipping industry. Our marine pumps are characterized by their durability, ease of maintenance and outstanding energy efficiency, resulting in reduced operating costs and a longer service life for your systems.
Benefit from our extensive product range, which includes customized pump systems for a wide variety of applications on board. Whether for ballast water treatment, fuel supply or lubricating oil supply - KRAL offers the right solution for your needs.
Our innovative screw pumps ensure smooth operation and contribute to the optimization of ship operating processes. You can rely on KRAL's outstanding quality and comprehensive services to keep your maritime equipment in top form at all times.
Our innovative screw pumps ensure smooth operation and contribute to the optimization of ship operating processes. You can rely on KRAL's outstanding quality and comprehensive services to keep your maritime equipment in top form at all times.
KRAL - Your expert for marine pumps.
"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 marine pumps.
Our marine pumps set standards in terms of efficiency and reliability. Discover the outstanding benefits that our pump solutions offer for your applications.
- Reliability.
Our marine pumps are characterized by their exceptional reliability. They are designed as marine pumps for continuous operation for long-term use in demanding maritime environments and minimize downtimes considerably.
- Efficiency.
KRAL's screw pumps offer high levels of efficiency and thus ensure efficient fuel consumption. This means lower operating costs and a more environmentally friendly ship operation.
- Robustness.
With their robust design, our pumps are ideally suited to the tough conditions at sea. They can withstand extreme temperatures, high pressure and corrosive environments.
- Low maintenance and long service life.
The innovative technology and high-quality materials of our pumps ensure low maintenance requirements. Their durable components and careful workmanship guarantee a long service life and reliability.
- Quiet and low-vibration.
Our pumps operate quietly and with low vibration, which contributes to a more pleasant working environment on the ship and reduces the load on the equipment.
- Highest safety standards.
KRAL fuel pumps comply with the highest safety standards and international norms. This guarantees safe operation and protects both your crew and your ship. Our pumps for marine use are also available with ATEX approval.
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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 marine pumps at a glance.
- High reliability and minimal downtime
- Efficient fuel consumption and cost savings
- Robust design for extreme conditions
- Low maintenance requirements
- Long service life and durability
- Constant and consistent flow rate
- Flexible designs and sizes
- Quiet and low-vibration operation
- Compliance with the highest safety standards
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 marine pumps.
Marine pumps for booster modules - K series.
The booster module is the heart of a ship's fuel supply system. This is where the fuel is filtered and the correct pressure and viscosity are set. The properties of the fuels used place high demands on the booster module pumps. Heavy fuel oil must be pumped at high temperatures. Critical substances may be contained in the fuel. Abrasive foreign particles are not completely retained despite elaborate filtering. KRAL K series screw pumps are self-priming positive displacement pumps. They pump the fuel over a wide pressure range with high efficiency(booster pumps), even if the viscosity changes.
The K series, with a delivery rate of 5 to 2,900 l/min and a pressure of up to 16 bar, is ideally suited for use in booster modules. They work reliably in a temperature range from -20 to +180 °C. With their robust design and high efficiency, they ensure a constant and reliable fuel supply, even under demanding conditions. Rely on the proven quality and performance of our screw pumps to reliably supply your marine engines with fuel.
The K series, with a delivery rate of 5 to 2,900 l/min and a pressure of up to 16 bar, is ideally suited for use in booster modules. They work reliably in a temperature range from -20 to +180 °C. With their robust design and high efficiency, they ensure a constant and reliable fuel supply, even under demanding conditions. Rely on the proven quality and performance of our screw pumps to reliably supply your marine engines with fuel.
Marine pumps for boilers - DKC | DLC series.
The double stations of the KRAL DKC | DLC series are the ideal solution for pumping boiler liquids on board ships. These pumps offer a flow rate of 5 to 2,000 l/min at a pressure of up to 40 bar.
The compact and ready-to-connect double stations are characterized by their high efficiency and reliability. The two built-in KRAL screw pumps are self-priming and ensure low-pulsation and quiet pumping. This ensures smooth operation that meets the requirements of the shipping industry.
The compact and ready-to-connect double stations are characterized by their high efficiency and reliability. The two built-in KRAL screw pumps are self-priming and ensure low-pulsation and quiet pumping. This ensures smooth operation that meets the requirements of the shipping industry.
Marine pumps for engine and gearbox lubrication - K | C series.
KRAL K series screw pumps offer an optimum solution for engine and gearbox lubrication in ships. With flow rates of 5 to 2,900 l/min and a pressure of up to 16 bar, these pumps ensure reliable and efficient lubrication, which is essential for the smooth operation of marine engines and gearboxes.
Our screw pumps are characterized by their high flow rate and small footprint. They pump the medium gently without squeezing it or generating pressure pulses that could damage the piping or other components. This not only extends the service life of marine engines and gearboxes, but also minimizes the risk of vibrations.
Our screw pumps are characterized by their high flow rate and small footprint. They pump the medium gently without squeezing it or generating pressure pulses that could damage the piping or other components. This not only extends the service life of marine engines and gearboxes, but also minimizes the risk of vibrations.
Ship pumps for cargo, tank transfer and bunkering - Z series.
With flow rates of 5 to 3,550 liters per minute and a maximum pressure of 100 bar, the Z series is perfectly suited for use in various ship systems. Thanks to the synchronized and non-contact operation of the spindles, even aggressive, contaminated and low to non-lubricating media can be conveyed reliably and with low pulsation. This feature makes the Z series particularly suitable for the transfer of freight and fuels, where high reliability and low maintenance requirements are crucial.
Another outstanding feature of the Z series is its ability to withstand dry running times, which further increases flexibility and reliability in operation. The double-flow design enables very high flow rates and ensures axial pressure equalization in the pump housing, which significantly extends the service life of the pump.
Another outstanding feature of the Z series is its ability to withstand dry running times, which further increases flexibility and reliability in operation. The double-flow design enables very high flow rates and ensures axial pressure equalization in the pump housing, which significantly extends the service life of the pump.
Ship pumps for steering gear, propeller adjustment, anchor winch - C | W series.
KRAL C | W series screw pumps are ideal for various marine applications. These pumps offer a reliable and efficient solution for rudder systems, propeller adjustment and anchor winches. Thanks to the positive displacement principle, they are particularly suitable for hydraulic applications with high system pressures.
The pumps deliver gently and constantly without squeezing the medium, which ensures a longer service life and greater system reliability. In contrast to many other operating principles, KRAL screw pumps offer a linear flow rate characteristic. This means they can be controlled easily and cost-effectively with a frequency converter.
The pumps deliver gently and constantly without squeezing the medium, which ensures a longer service life and greater system reliability. In contrast to many other operating principles, KRAL screw pumps offer a linear flow rate characteristic. This means they can be controlled easily and cost-effectively with a frequency converter.
Do you have any questions about
Ship pumps
Just send us a short message and we will be happy to answer any questions you may have.
Technical data of our marine pumps.
K series
L series
C series
CK series
CL series
CG series
Z series
MAG series
DKC / DLC / DS/L series
DKC series.
DLC series.
DS/L series.
EK / EL serie
EK series.
EL 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 |
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.
