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Rotary Evaporation Vacuum Pump Solutions
Vacuum pumps provide the operational muscle for your rotary evaporator. Apart from the vacuum control, your evaporator is just rotating glassware! BrandTech Scientific offers a full range of vacuum pumps and systems that help optimize your rotary evaporation application.
To find the vacuum pump or system that best meets your needs, answer the following questions. How much vacuum do I need? The vacuum capacity required from a pump to support a rotary evaporation application is determined by the typical application temperatures and the solvents being evaporated. Virtually all rotary evaporation applications can be accomplished with diaphragm vacuum pumps. The vacuum pump should have the ability to reach the vapor pressure of the solvent at the application temperature. How much control do I need? Rotary evaporation applications often require significant oversight and control because the heat and high surface area increase evaporation rates. This can lead to solvent “bumping” or boiling over. Adaptive Vacuum Control The best way to prevent bumping is with an adaptively controlled vacuum pump. Adaptive control, an innovation exclusive to VACUUBRAND® VARIO™ pumps and systems, combines an electronic controller and speed-controlled motor to automatically perform the following tasks: · Find and follow boiling points, even for solvent mixtures; · Evaporate up to 30 percent faster; and
· Shut the pump off when evaporation is completed.
Electronic Control Some rotary evaporation applications might benefit from control, but not require the precision of adaptive control. The PC510 NT system is an excellent choice for these applications. It is a great workhorse system for evaporation of many common solvents in rotary evaporators up to 5 liters in size. The integrated MZ2C NT pump evaporates solvents that are slightly less volatile than water, and the system includes a controller that allows preset or semi-automatic setting of vacuum level, with appropriate hysteresis adjustment. Solvent recovery is provided by an inlet catchpot and outlet condenser. For larger or more demanding evaporations, select the PC610 NT, with a 1.5mbar pump rated to 2.2cfm. Need to run two evaporators? Consider the PC520 NT or PC620 NT. They’ll control two applications at once, saving bench space and the cost of an additional pump or system. Manual Control For applications that require only minimal control, select the economical PC101 NT vacuum system for basic evaporation and vapor capture. It includes the same 7mbar MZ2C NT pump as the PC510 NT along with a stand, inlet catchpot and outlet condenser, but substitutes a manual flow-control valve and dial gauge for economy. It’s an excellent choice for basic evaporation! For vacuum to 1.5mbar, choose the PC201 NT. Or support 2 evaporators with an economical, space-saving Synchro system! Do I need solvent recovery? Solvent vapor that makes it past the condenser in the evaporator can condense in the vacuum line. For best pump performance, condensed vapors should be kept out of the pump. Solvents that are vapors under vacuum can be captured efficiently at atmospheric pressure at the diaphragm pump outlet. Consider the MD1C+AK+EK for labs that already have a stand-alone vacuum controller, or one integrated into their evaporator. It features the same chemistry-design pump and solvent recovery as the 2mbar PC3001 VARIO™ system, but without control. Its integrated inlet catchpot and exhaust condenser prevent condensates from entering the pump and vapors from polluting the lab. For applications that do not require either control or solvent recovery, consider a stand alone pump such as the MD1C. It provides superior flow rates at working vacuum to competitive pumps, with a significantly lower price and very small footprint. Integrated gas ballast provides high condensate tolerance. The MD1C is also preferred by customers who address vacuum control and solvent recovery through other methods. What about larger or multiple rotary evaporators? BrandTech and VACUUBRAND offer the most comprehensive line of chemistry-design diaphragm vacuum pumps, including models that can operate rotary evaporators up to 100 liters or larger, with or without integrated VARIO™ adaptive control. We also offer systems that will run two different evaporation applications simultaneously without interference! Still not sure? Contact BrandTech Scientific for more information.
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