The cost of a rotary evaporator vacuum pump typically ranges from several hundred euros.
The price varies based on the type of pump.
Non-regulated vacuum pumps are more cost-effective and suitable for one to three rotary evaporators.
Speed-controlled vacuum pumps, which offer more flexibility and energy efficiency, tend to be more expensive.
4 Key Factors to Consider When Choosing a Rotary Evaporator Vacuum Pump
1. Non-regulated Vacuum Pumps
These pumps are generally more affordable.
They are commonly used for one to three rotary evaporators.
They operate at maximum performance levels as required by the customer.
The vacuum they produce is initially uncontrolled but can be regulated via an interposed vacuum valve.
The cost-effectiveness of these pumps makes them a popular choice.
However, they may require more frequent maintenance and replacement of wearing parts, which can cost up to 100 euros.
2. Speed-controlled Vacuum Pumps
These pumps are more advanced and offer adjustable speed based on the signal from the rotary evaporator or a separate control unit.
This feature allows for more precise control and energy efficiency, reducing energy consumption by up to 90%.
Although these pumps do not require a vacuum valve and can lead to annual savings in electricity costs, they are more expensive initially.
The high price is offset by the reduced need for wearing parts and longer maintenance intervals, making the system cost-effective over several years.
3. Selection Considerations
When selecting a vacuum pump for rotary evaporation, factors such as the specific boiling points of the substances and the volume of the rotary evaporator must be considered.
Chemistry diaphragm pumps, especially multi-stage ones, are recommended for their resistance to organic solvents and aggressive chemicals.
The choice between basic, advanced, or fully automatic pumps with adaptive technology depends on the required vacuum depth and pumping speed.
It also depends on the need for solvent recovery and independent vacuum control for multiple evaporators.
4. Cost Variation
The cost of a rotary evaporator vacuum pump can vary significantly based on the type and features of the pump.
While non-regulated pumps offer a more economical solution, speed-controlled pumps provide enhanced functionality and long-term cost savings, albeit at a higher initial investment.
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