简体中文
EnglishHow do I choose the right VACUUBRAND vacuum pump for my application?
Updated
Start with your application and your required vacuum level, then match them to a pump family. VACUUBRAND's site organizes the choice in two ways: an application list (rotary evaporator, drying oven, filtration, lyophilization, reactors & synthesis, Schlenk line, fine vacuum distillation, and more) and a pump-type list defined by achievable vacuum. If you already know your target pressure and your process, you can go straight to the pump type; if you only know what you are doing, use the application list or the Vacuum Pump Selection Guide.
Two ways to narrow the choice
By pump type and vacuum range
| Pump type | Oil situation | Vacuum range (as stated on site) |
|---|---|---|
| Diaphragm pumps | Oil-free | down to 0.3 mbar |
| Screw pumps | Oil-free | down to 10⁻³ mbar |
| Rotary vane pumps | Oil-sealed | down to 10⁻³ mbar |
| Fluid aspiration systems | — | for safe aspiration of cell supernatants |
The dividing line that matters most is 0.3 mbar versus 10⁻³ mbar. If your process only needs rough vacuum, a diaphragm pump covers it without oil. If you need fine vacuum, you are looking at screw or rotary vane pumps, and the oil-free/oil-sealed distinction becomes the deciding factor.
By application
The site lists recommended pumps for: rotary evaporator, drying oven, filtration, concentrator, reactors & synthesis, fine vacuum distillation, lyophilization (freeze drying), Schlenk line, degassing, fore vacuum for HV and UHV, coating, regeneration of cryo pumps, and glovebox. Each of these pages points to specific recommended pumps, which is faster than reasoning from vacuum ranges alone.
Using the selection guide
The Vacuum Pump Selection Guide works as a short interview: choose your application, specify your requirements, and get product recommendations ("Find your pump"). This is the intended path when you are unsure which family fits — for example, when you know you are running a rotary evaporator but not what ultimate pressure you need.
If you prefer to browse products directly, the chemistry diaphragm pump line is shown with its key figures, for example:
- PC 3001 VARIO select — 2 mbar | 2 m³/h
- PC 3004 VARIO select — 1.5 mbar | 4.6 m³/h
- PC 3012 NT VARIO select — 1.5 mbar | 14.3 m³/h
Note the two numbers: ultimate pressure and pumping speed. Two pumps can reach the same pressure but differ in how fast they evacuate your system, so match flow rate to your vessel size and process speed, not just to the pressure figure.
Gauges and controllers
Pump choice is only part of the setup. VACUUBRAND offers vacuum gauges for rough vacuum down to 1 mbar, fine vacuum down to 10⁻³ mbar, or devices covering both ranges — all described as chemically resistant. For processes that need precise, reproducible vacuum control, the VACUU·SELECT controller is the site's recommended option. If your application depends on holding a set pressure rather than just reaching it, budget for a controller alongside the pump.
Practical checklist
- Write down your target pressure. Below roughly 1 mbar, diaphragm pumps are out of range.
- Decide whether oil-free operation is required. Solvent-heavy or clean applications usually push toward diaphragm or screw pumps.
- Identify your application in the site's list and compare its recommended pumps against your pressure and flow needs.
- Check whether you need a gauge, a controller, or both for reproducible control.
- If still unsure, run the Vacuum Pump Selection Guide or send a free inquiry through the site.
One thing to verify before ordering: the site currently shows a promotion ("Save 18% now") stated as valid from September 15 until December 15, 2026. Confirm current pricing and promotion terms in the online shop, since offers are time-limited.