Vacuum group principle
A vacuum group is composed of ejectors mounted in series (and / or in parallel) for obtaining a suction capacity and a vacuum level as specified by our customers. A vacuum group relies on working fluids, cooling fluids and available energy sources. Depending on the suction pressure applied and the cooling temperature, a vacuum group can have up to 6 compression levels. It may be associated with several technologies such as liquid ring pumps. Some examples are given below:Multi level Vacuum groups
With mixing condensers

Vacuum group with 3 levels and 2 intermediate condensers as well as a final condenser for a fertilizer plant.
With tubular condensers

Vacuum group with 2 levels of stacked intermediate and final condensers in refinery for diesel drying unit.

Vacuum group with 2 levels of intermediate and final condensers in line, for starting up a turbine condenser.
Mixed Multi level Vacuum groups (VAPYDRO)

Description
The VAPYDRO
The output gases of the exchanger and condensates are finally sucked into a primary pump and repulsed in the atmosphere (See block diagram below).
Benefits
- Low price and operating cost
- Exceptional reliability (The ejectors are statics)
- Easy to maintain
- Limited noise
- Delivered as turnkey
- Corrosion resistance
- Aspirate steams or dust loaded gases
Options(dotted line on block diagram)
- Removable bundle heat exchanger (U form)- Check valve between condenser and pump
- Downstream gas / liquid separator of the liquid ring pump
- Measurement and security instrumentation
- Explosion-proof engine (EExd II BT 4)
- Separator kit on powered working steam
- Regulator of working steam
Examples of realizations