LABOPORT® Oil-Free Diaphragm Vacuum Pumps

The KNF LABOPORT® Oil-Free Diaphragm Vacuum Pumps provide reliable and efficient vacuum generation for laboratory, research and industrial applications. These compact pumps combine chemical resistance with dependable performance without the use of oil.

The LABOPORT® series offers a choice of pumping capacities and ultimate pressures for vacuum desiccators, laboratory evacuation, filtration, drying and the handling of compatible gases and vapours.

Three models are available: N 820 G, N 840 G and the compact MINI LABOPORT® N 96, offering pumping capacities from approximately 7 to 34 L/min and ultimate pressures down to 6 mbar.

Features & Benefits

100% Oil-Free Operation: Dry-running diaphragm technology eliminates the need for operating oil and prevents oil-related contamination.

Chemical Resistance: Chemically resistant wetted materials provide compatibility with a wide range of laboratory gases and vapours.

Reliable Vacuum Performance: Pumping capacities from approximately 7 to 34 L/min and ultimate pressures down to 6 mbar.

Compact Design: Space-saving construction allows convenient integration into laboratory environments.

Low Maintenance: Durable diaphragm technology reduces maintenance requirements compared with oil-sealed vacuum pumps.

ATEX Compatibility: The N 820 G and N 840 G feature ATEX certification for specified internal gas atmospheres.

KNF LABOPORT® N 820 G

The N 820 G is a compact and chemically resistant diaphragm vacuum pump combining efficient pumping performance with excellent vacuum capability.

With an ultimate pressure of 6 mbar, it is particularly suitable for laboratory evacuation, vacuum drying and medium-sized vacuum desiccators.

Pumping Capacity: 20 L/min

Ultimate Pressure: 6 mbar (absolute)

Supply Voltage: 100–240 V AC

Power Consumption: 60 W

Weight: Approx. 8.8 kg

Pump Head: PTFE

Diaphragm: PTFE-coated

Valves: FFPM

Gas Ballast Valve: Integrated

Speed Control: Integrated

ATEX Classification: II 2/-G IIB+H₂ T3 – internal atmosphere only

Recommended Vacuum Desiccator: EXSICA3S Standard – 17.8 L

Recommended Connection Fitting: Push-to-Connect Fitting 1/8" BSP with Sealing Ring – OD 6 mm

The original hose connector can be replaced with the corresponding push-to-connect fitting for direct connection to the OD 6 mm tubing used with the vacuum desiccator.

KNF LABOPORT® N 840 G

The N 840 G is a powerful chemical-resistant diaphragm vacuum pump designed for demanding laboratory applications requiring higher pumping capacity and reliable vacuum performance.

With a pumping capacity of 34 L/min and an ultimate pressure of 6 mbar, it is particularly suitable for larger vacuum desiccators and applications requiring faster evacuation.

Pumping Capacity: 34 L/min

Ultimate Pressure: 6 mbar (absolute)

Supply Voltage: 100–240 V AC

Power Consumption: 100 W

Weight: Approx. 11.3 kg

Pump Head: PTFE

Diaphragm: PTFE-coated

Valves: FFPM

Gas Ballast Valve: Integrated

Speed Control: Integrated

ATEX Classification: II 2/-G IIB+H₂ T3 – internal atmosphere only

Recommended Vacuum Desiccator: EXSICA2W Extra-Wide – 31.3 L

Recommended Connection Fitting: OD6-BSP1/4 – Push-to-Connect Fitting 1/4" BSP – OD 6 mm

The original hose connector can be replaced with the corresponding push-to-connect fitting for direct connection to the OD 6 mm tubing used with the vacuum desiccator.

KNF MINI LABOPORT® N 96

The MINI LABOPORT® N 96 is an exceptionally compact and lightweight diaphragm vacuum pump designed for smaller laboratory applications and portable vacuum systems.

Weighing only approximately 1.3 kg, it is an ideal companion for the EXSICA3P Portable Vacuum Desiccator, providing a practical compromise between vacuum performance, compact dimensions and portability.

Its ultimate pressure of approximately 130 mbar is higher than that of the N 820 G and N 840 G, making it suitable for applications where portability is more important than maximum vacuum performance.

Pumping Capacity: Approx. 7 L/min

Ultimate Pressure: Approx. 130 mbar (absolute)

Motor Voltage: 24 V DC

Power Supply: 100–240 V AC

Power Consumption: 19 W

Weight: Approx. 1.3 kg

Pump Head: PPS

Diaphragm: PTFE-coated

Valves: FPM

Speed Control: Integrated

ATEX Classification: Not ATEX-rated

Recommended Vacuum Desiccator: EXSICA3P Portable – 2.5 L

Recommended Connection Fitting: Push-to-Connect Fitting 1/8" NPT – OD 6 mm

The original hose connector can be replaced with the corresponding push-to-connect fitting for direct connection to the OD 6 mm tubing used with the portable vacuum desiccator.

ATEX Compatibility

The KNF LABOPORT® N 820 G and N 840 G feature an ATEX classification of II 2/-G IIB+H₂ T3, applicable to the internal gas atmosphere of the pump.

This classification allows the handling of specified potentially explosive gas mixtures within the limits defined by KNF.

The ATEX classification does not extend to the external installation environment. These pumps must not be installed in potentially explosive atmospheres unless separately approved for the applicable hazardous area.

The KNF MINI LABOPORT® N 96 is not ATEX-rated and must not be used for pumping potentially explosive gas mixtures.

Always observe the manufacturer's operating instructions, chemical compatibility requirements and applicable ATEX limitations.

Vacuum Desiccator Applications

KNF LABOPORT® diaphragm vacuum pumps provide clean and oil-free vacuum generation for laboratory vacuum desiccators.

The N 820 G is recommended for the EXSICA3S Standard, while the higher-capacity N 840 G is particularly suitable for the EXSICA2W Extra-Wide.

The compact N 96 is recommended as a portable pumping solution for the EXSICA3P Portable, where its low weight and small dimensions offer advantages despite its higher ultimate pressure.

Explore our Vacuum Desiccator Cabinets (Vakuum-Exsikkatoren) for compatible laboratory vacuum storage solutions.

Connection Fittings & Accessories

All three pumps can be connected to the vacuum desiccators using suitable OD 6 mm push-to-connect fittings instead of the original hose connectors.

The required fitting depends on the pump model and its connection thread.

N 820 G: Push-to-Connect Fitting 1/8" BSP with Sealing Ring – OD 6 mm

N 840 G: Push-to-Connect Fitting 1/4" BSP – OD 6 mm (OD6-BSP1/4)

N 96: Push-to-Connect Fitting 1/8" NPT – OD 6 mm

Matching fittings and tubing are available from our Vacuum Desiccator Accessories & Replacement Parts.

Applications

Vacuum Desiccators: Oil-free evacuation of laboratory vacuum storage cabinets for protecting moisture-sensitive samples.

Vacuum Drying: Removal of air and moisture from laboratory materials and scientific specimens.

Laboratory Filtration: Vacuum-assisted filtration and sample preparation.

Chemical Laboratories: Evacuation and transfer of compatible gases and vapours with appropriately selected pump models.

Research & Development: Reliable vacuum generation for laboratory experiments and scientific equipment.

KNF Quality & Engineering

Founded in Germany in 1946, KNF is a Swiss-headquartered, family-owned manufacturer of diaphragm pumps and laboratory vacuum equipment.

With decades of engineering expertise and international development and manufacturing capabilities, KNF stands for reliable performance, innovative technology and long-lasting quality.

The LABOPORT® series combines oil-free operation, chemical resistance and dependable vacuum performance for demanding laboratory and research applications.