STEAM JET EJECTORS FOR EFFICIENT VACUUM GENERATION
Applied Vacuum specializes in the design and supply of steam jet ejectors—a reliable, low-maintenance solution for creating vacuum in industrial processes. These thermo-compressor systems use high-pressure steam to entrain and compress low-pressure gases or vapors, making them ideal for continuous-duty operations in harsh environments.
Our steam ejectors are widely used in petrochemical plants, chemical processing, refineries, power generation, edible oil deodorization, and pharmaceutical production, offering efficient performance with minimal energy consumption and no moving parts.
Key Benefits of Our Steam Jet Ejectors:
- No moving parts – reduced maintenance and increased reliability
- Customizable configurations – single-stage to multi-stage systems
- Corrosion-resistant materials – suitable for aggressive gases and vapors
- Energy-efficient operation – optimized nozzle and diffuser design
- Ideal for high-capacity vacuum applications
Typical Applications:
- Vacuum distillation
- Deaeration and evaporation
- Crystallization and drying
- Condenser evacuation
- Edible oil processing (deodorization)
Applied Vacuum’s engineering team works closely with clients to ensure each steam jet ejector system is tailored to meet exact process requirements and performance specifications.
Applied Vacuum has been supplying Ejectors and multi-stage Ejector sets for over 40 years. With state of the art design software and years of experimental testing, Applied Vacuum now offers the most efficient ejector systems around.
What are Ejectors and how do they work?
Steam Jet Ejectors are the simplest means available today for vacuum raising applications. The Steam Ejector utilizes high pressure steam to compress low pressure vapours or gases.
This creates a vacuum in a vessel or chamber to which the ejectors is connected. The fundamental operation of an ejector is shown in the illustration:
Steam at pressure Pi expands through a nozzle and exits at very low pressure (Px) and at very high velocity. The low pressure induces a flow of load vapours at a pressure (P1) into the ejector. The two streams i.e. the low pressure, high velocity steam from the nozzle, together with the slower, entrained load vapours, will mix as they converge into the throat of the ejector. Upon leaving the throat, the gases slow down and regain pressure to a pressure P2.
The load gases have been compressed from their original pressure P1 to a new pressure, P2. We define the compression ration for this ejector as P2/P1.
If Ws kg/hr motive steam are required to entrain and compress Wl kg / hr of load vapours, we define the entrainment ratio for this ejector as Wl/Ws. These ratios are computer calculated and are the key parameters in ejector design.
Ejectors use steam to generate vacuum and can be single or multi-stage:
- Single stage (up to 150 mbar(A))
- 2 stage set. Condensing and non-condensing ( up to 65 mbar(A))
- 3 or more stages requires condensing (anything below 65 mbar(A))
Multi Stage Ejectors Sets
In practice, for suction pressure below 150 mbar absolute, more than one ejector will be used, usually with condensers between the ejector stages. Condensing of motive steam greatly improves Ejector Set efficiency. We supply both barometric and shell-and-tube surface condensers for this purpose.
