Marine & Shipbuilding
Reliable ejectors and jet pumps for marine applications. No moving parts, self-priming, classification society approved. Trusted by shipyards and operators worldwide.
No moving parts
Jet pump technology means no wear, no maintenance, and reliable operation at sea.
Self-priming
Ejectors prime themselves and handle air-water mixtures without losing suction.
Marine approved
Classification society approved designs for commercial and naval vessels.
Minimal maintenance
Simple construction with no seals, bearings, or impellers to replace.
Why ejectors for marine?
When you’re days from the nearest port, equipment reliability isn’t optional but absolutely essential. Ejectors have no moving parts: no rotating shafts, no seals to fail, no bearings to wear out. They simply work, day after day, year after year.
Körting has been supplying ejectors to the marine industry for over a century. Their jet pumps are found on vessels of every type, from container ships to naval frigates, performing critical functions like bilge pumping, ballasting, and vacuum generation.
Ejector types for marine
Körting manufactures ejectors for every shipboard application. The operating principle is always the same, with a high-pressure motive fluid that entrains and compresses a secondary fluid, but the design is optimized for each application.
Liquid jet ejectors
Seawater-driven for bilge pumping, tank stripping, and ballast operations.
Steam jet ejectors
Vacuum generation for evaporators, distillers, and freshwater generators.
Gas jet compressors
Tank ventilation and vapor recovery on tankers and chemical carriers.
Specific use cases
How ejectors solve real marine engineering challenges.
Bilge pumping
Challenge
Bilge water collects in the lowest parts of the ship. Mechanical pumps can lose prime and fail when handling air-water mixtures.
Solution
Liquid jet ejectors are self-priming and handle air-water mixtures without losing suction. Seawater motive supply is always available.
Körting liquid jet ejectors
Ballast tank stripping
Challenge
Ballast tanks must be emptied completely for stability calculations and to maximize cargo capacity. Pumps can’t reach the last few centimeters.
Solution
Ejectors strip tanks to very low residual levels (<100mm). No moving parts means reliable operation even with debris.
Körting stripping ejectors
Freshwater generation
Challenge
Freshwater generators need vacuum to lower the boiling point of seawater. Mechanical vacuum pumps require maintenance and can fail.
Solution
Steam ejectors create stable vacuum for evaporators with no maintenance. Multi-stage systems achieve deep vacuum efficiently.
Körting steam ejectors
Cargo tank ventilation
Challenge
Tankers must ventilate cargo tanks during loading/unloading. Vapors may be flammable or toxic, and mechanical equipment creates ignition risk.
Solution
Gas jet compressors move vapors without sparks or hot surfaces. No electrical components in the vapor stream.
Körting gas jet compressors
Condenser air removal
Challenge
Air leaks into steam condensers, reducing efficiency and causing corrosion. Must be removed continuously.
Solution
Steam ejectors remove non-condensables from condenser. Reliable operation critical for propulsion efficiency.
Körting air ejectors
Fire fighting eductor
Challenge
Fire fighting systems need foam proportioning. Mechanical proportioners can fail under pressure.
Solution
Eductor-based systems mix foam concentrate with seawater using venturi effect. No moving parts, always ready.
Körting eductors
Vessel types we serve
Körting ejectors are trusted across the maritime industry.
Container ships
Bilge, ballast, ventilation
Tankers
Cargo, tank cleaning, vapor
Bulk carriers
Bilge, ballast, hold ventilation
Naval vessels
All ejector applications
Offshore platforms
Process and utility systems
Cruise ships
HVAC, freshwater, waste
175+ years of experience
Körting has been engineering jet pumps since 1871. Their ejectors benefit from over a century of continuous refinement and real-world operational feedback from vessels worldwide.
As Körting’s partner in the Benelux region, we provide local support for new construction projects and retrofit solutions for existing vessels.
We provide:
- Application engineering support
- Sizing calculations and selection
- Classification society documentation
- Spare parts supply
- Installation guidance
Frequently asked questions
Ejectors have no moving parts, making them extremely reliable in the harsh marine environment. They’re self-priming, can handle air-water mixtures, and require virtually no maintenance. These are critical advantages when you’re far from port.
Ejector inquiry?
Contact us for application engineering support, sizing calculations, or to discuss your project requirements.
