Degassing

Vacuum degassing is used, for example, in sample preparation for HPLC or in materials research and production. Dissolved gases are removed from liquids in order to avoid negative influences.

Product recommendations

Screw pumps

The VACUU·PURE dry screw pump offers clean ultimate vacuum in the range of 10^-3 mbar. It combines three important advantages for the user: 100% oil-free, no abrasion, no wear parts. VACUU·PURE is ideal for clean processes that require dry and hydrocarbon-free vacuum. The spindles of the screw pump run contact-free and are therefore both abrasion-free and wear-free. This also means that there are no process interruptions due to wear parts or oil changes. The chemically resistant VACUU·PURE 10C version is available for working with aggressive media.

VACUU·PURE 10C

chemically resistant
5 x 10^-3 mbar | 9 m³/h

VACUU·PURE 10

for non-corrosive media
5 x 10^-3 mbar | 10 m³/h

emission condenser EK

for solvent recovery

VACUU·SELECT

package fine vacuum control
down to 10^-3 mbar

Diaphragm pumps

Diaphragm pumps are ideal for clean processes down to approx. 1 mbar. They run 100 % oil-free and have no abrasive seals that can cause abrasion. Important advantages of VACUUBRAND diaphragm pumps are their unrivaled reliability and long maintenance intervals.
Our VARIO diaphragm pumps are particularly efficient. The VARIO technology controls the vacuum precisely and according to the need by adaptively adjusting the motor speed of the pump. This results in optimum process times. It also makes the pump whisper-quiet, reduces energy consumption and vibration and extends the service life of the diaphragms.

MD 4 NT

1 mbar | 3.8 m³/h

MD 12 NT

2 mbar | 12.1 m³/h

MD 4 VARIO select

with VARIO control
1 mbar | 5.7 m³/h

MD 12 NT VARIO select

with VARIO control
1.5 mbar | 13.4 m³/h

Chemistry diaphragm pumps

VACUUBRAND chemistry diaphragm pumps provide uncompromising chemical resistance for use with corrosive media - even when used with aggressive chemicals. To achieve this, we use carefully selected materials. They offer the same benefits as the diaphragm pumps for non-corrosive media and are also available with VARIO control.

MD 4C NT +AK+EK

1.5 mbar | 3.4 m³/h

MD 12C NT +AK+EK

2 mbar | 12.0 m³/h

PC 3004 VARIO select

with VARIO control
1.5 mbar | 4.6 m³/h

PC 3012 NT VARIO select

with VARIO control
1.5 mbar | 14.3 m³/h

Rotary vane pumps

Rotary vane pumps are suitable for degassing at low ultimate vacuum. They are powerful in the 10^-3 mbar range. In contrast to diaphragm and screw pumps, however, they require oil as an operating medium. When pumping aggressive gases or vapors, it is often advisable to use a cold trap with rotary vane pumps.
The chemistry-HYBRID pump is a combination of a rotary vane pump and a chemistry diaphragm pump. Compared to a simple rotary vane pump, it offers significantly better protection against corrosion and extended oil change intervals.

RC 6

Chemistry-HYBRID pump
2 x 10^-3 mbar | 5.9 m³/h

RZ 6

Rotary vane pump
2 x 10^-3 mbar | 5.7 m³/h

RZ 9

Rotary vane pump
2 x 10^-3 mbar | 8.9 m³/h

VACUU·SELECT

package fine vacuum control
down to 10^-3 mbar

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Vacuum for degassing

Rely on oil-free vacuum pumps

Vacuum degassing is based on Henry's law. According to this law, the volume of a dissolved gas is proportional to the pressure above the liquid. If this pressure is lowered, the gases can escape more easily.

The ultimate vacuum and pumping speed required for degassing depends on individual requirements such as the desired degree of degassing, the media used or the volume of the container.

If solvents are used, the vacuum pump should be chemically resistant. Oil-free vacuum pumps are particularly advantageous where high process purity is required. In addition, they do not cause any interruptions due to oil changes.

Diaphragm pumps meet all these criteria for the pressure range down to approx. 1 mbar and screw pumps down to the 10^-3 mbar range. Both pump types are also suitable for larger volumes. The operation of a cold trap is very rarely required. They are therefore perfect for uninterrupted and low-maintenance operation.

For automation or multi-stage processes, the VACUU·SELECT controller offers the option of creating and saving individual processes.

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Degassing

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Vacuum for degassing

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