(Single-Stage)
In steam jet vacuum ejector live steam expands through the inlet nozzle, issuing at high velocity. The powerful suction thus produced entrains air or vapours via the suction connection.
Advantages
- A single pump can manage very large flow volumes of up to 1000000 m³/h without problems.
- Absolutely no difficulties in the case of process media with a strong tendency towards fouling and small amounts of solids or liquids
- Corrosion/erosion resistance by choosing suitable material
- Easy installation
- High standard of operational reliability and vacuum performance
- Low investment costs in comparison to other possible alternatives
- No moving parts
- Practically maintenance free
- Simple compact construction
Applications
If a plant is to be evacuated within a given time, for example, during starting up, and the vacuum pump which maintains the operational vacuum takes longer than the given time, a jet pump is added as a start-up pump or pre-evacuator to speed up the evacuation. It is brought into operation together with the vacuum maintaining pump, but works only until the required vacuum, or a determined intermediate vacuum is reached.
Steam jet vacuum pumps are commonly used for handling condensable and noncondensables in processes such as
- Absorption
- Cooling
- Distillation
- Exhausting air from vacuum pans and evaporators
- Exhausting tire molds
- Freeze drying
- Handling corrosive gases
- Mixing
- Priming centrifugal pumps
- Production of vacuum in stirred vessels in discontinuous processes
- Vacuum packaging
Range of Operation
When compressing against atmospheric pressure, used for the production of vacuum down to a suction pressure approx. 100 mbar.
Single stage start-up jet pumps can, according to the motive steam pressure, achieve a suction pressure of 50 – 200 mbar.
Materials
- Cast iron
- Cast stainless steel
- Other materials on request
- Steel or stainless steel
- Temperature change resistant porcelain
Typical Applications:
