Deaerators
Proven Performance. Lower Costs. Smarter Design.
Integrating advanced deaeration technology into modern power plant engineering can be complex but with the Stork Spray-Type Deaerator, it doesn’t have to be. Our patented single-vessel design has been trusted in over 5,000 installations worldwide, delivering unmatched reliability and efficiency in thermal power generation.
Why Choose the Stork Spray-Type Deaerator?
By incorporating the Stork deaerator into your plant design, you benefit from:
- Reduced Capital Investment – thanks to its compact, efficient design
- Lowest Total Cost of Ownership (TCoO) – through minimal maintenance and long service life
- Outstanding Performance & Reliability – even under demanding operating conditions
Design Your Own Deaerator
To support your engineering process, we offer the Deaerator Design Tool; an intuitive online platform that lets you configure your own deaerator based on your plant’s specific requirements.
Added Value
The Stork Spray-Type Deaerator offers significant added value through smart engineering and proven performance:
- A compact single-vessel design that integrates three essential functions: deaeration, pre-heating, and feedwater storage — all in one unit
- The patented Stork sprayer ensures optimal water distribution and fine atomization, maximizing gas removal efficiency and thermal performance
- Full-service support through Bilfinger, including engineering, manufacturing, and lifecycle services. Production takes place in Bilfinger’s own 16,000 m² workshop, supported by a global network of trusted partners
- Versatile application across a wide range of power generation systems, including conventional plants, CCPP, CHP, CSP, nuclear facilities, and FPSOs
Stork Spray-Type Deaerator:
Compact & Integrated
The Stork Spray-Type Deaerator simplifies deaeration with a single horizontal vessel that integrates:
- A built-in, patented Stork spray head for fine atomization and efficient gas removal
- Deaeration, pre-heating, and storage in one compact unit
- Internal vent condenser functionality, eliminating the need for external components
This design reduces installation complexity, saves space, and lowers both capital and operational costs — all while maintaining high performance and reliability.
Watch our video on the Operating Principle of Spray-Type Deaerators
Types, Applications & Specifications of the Stork Spray-Type Deaerator
| Type | Application | Water flow capacity |
| Horizontal | Standard solution for power generation, process industry, and marine applications | 10 t/h to unlimited |
| Vertical | Ideal where a small footprint is required | 10 to 650 t/h |
| Internal | Drum Installed inside the LP drum of HRSGs; no external steam source needed | 50 to 450 t/h |
| Nuclear | Specifically designed for nuclear power plants | Unlimited |
| Vacuum | Suitable for full vacuum and overpressure operation; pressure down to 0.2 bar(a) | 10 to 2,000 t/h |
| Inside Condenser | For demineralized water deaeration inside condensers; operates at 0.1 bar(a) | Operates with or without external steam source |
More than just New-Build Deaerators
In addition to the engineering and fabrication of new Stork Spray-Type Deaerators, Bilfinger provides a comprehensive range of services, designed to ensure your deaerator remains reliable, efficient and sustainable throughout its entire lifecycle.
Upgrade Your Tray-type Deaerator
Bilfinger offers a smart retrofit solution to convert existing tray-type (dome-type) deaerator into
efficient Stork Spray-type systems. Payback time: 2 – 5 years.
What We Do
- Remove or deactivate the dome;
- Install new internals, including the patented Stork sprayer;
- Re-use existing nozzles where possible;
- Reconnect piping and insulation;
- Commissioning and start-up.
What You Get
- Full engineering package;
- Higher efficiency;
- Lower maintenance;
- Reduction of Operational costs;
- New internals and sprayer;
- Performance guarantee;
- Optional site execution and start-up support.
Our Bilfinger specialists can perform on-site inspections to assess the current condition of your deaerator.
We provide clear insights into:
- Remaining service life;
- Recommended maintenance actions for the coming years;
- Possibilities for higher efficiency.
This proactive approach helps you plan ahead, avoid unplanned downtime, and extend the life of your equipment.
As the original equipment manufacturer (OEM) of the Stork Spray-Type Deaerator, Bilfinger supplies genuine spare parts for every Stork unit ever put into operation — ensuring perfect compatibility, long-term reliability, and sustained performance.
Bilfinger offers a range of technical studies to help clients select the right deaerator with the right specifications — tailored to their process and operational goals.
These studies provide:
- Years of knowledge and expirience for selecting a fit-for-purpose deaerator
- Long-term performance assurance based on your plant’s needs
- Guidance on modifications when process conditions change
This ensures your deaerator remains efficient, reliable, and future-proof — even as your operations evolve.
