Vacuum in the laboratory – where does it come from?

„Emerging from the wall“ – could be a typical answer. Nobody worries about this matter, as long as everything is working fine and all the required connections and valves are available. Whether there is vacuum or not, you probably do not even notice until there is no vacuum available for whatever reasons. Vacuum technology often goes hand in hand with typical laboratory applications like evaporation, drying or filtration – however it is indispensable! There are several possibilities of providing vacuum in the laboratory – each having its own advantages and disadvantages:

Single user vacuum pump

Having just one vacuum pump on the laboratory bench, you certainly won’t ask yourself where the required vacuum comes from. A chemically resistant vacuum pump exclusively for your own application – this is the ideal individual solution offering best working conditions. Chemistry diaphragm pumps with exhaust vapor condenser for solvent recovery and separator for pump protection from condensate should definitely be the first choice. VACUUBRAND®’s VARIO® diaphragm pumps with variable running speed and further setting and control options offer further advantages such as the “always correct vacuum”, energy saving and remote control options.

Central vacuum

Things look different if a vacuum tubing needs to be connected to a wall-mounted hose nozzle and a valve needs to be opened. In this case the vacuum supply comes either from a central vacuum or a local vacuum network. The laboratory user usually has little influence on having adequate ultimate vacuum or perfectly suitable flow rates for his application - despite oversized vacuum pumps typically being used in central vacuum systems. Short-time ventilation of different applications e.g. can negatively influence the performance of the entire centrally fed laboratory vacuum. Future modifications become difficult due to the lack of flexibility of fixed piping installations. Maintenance of the vacuum generator or the piping system can affect all users at the same time. Unwanted mixtures of vapors and solvents from several laboratories may develop inside the long pipelines. All these factors should be considered – as well as the high operating and maintenance costs.

VACUU·LAN® Vacuum network for laboratories

A local vacuum network represents the perfect compromise between a single-user pump and a ...

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