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KNF LABOPORT N 840 G Diaphragm Pump

NewKNFPumps (liquid, other)United States

€2,717.59excl. VAT

In stock

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Maximum Flow Rate
34 l/min (2.04 m 3/h)
Ultimate Vacuum
6 mbar (abs.)
Operating Pressure
0.1 bar
Pump Head Material
TFM PTFE
Diaphragm Material
PTFE-Coated
All 14 specifications
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Specifications 14

Brands
KNF
New/Used
New
Maximum Flow Rate
34 l/min (2.04 m 3/h)
Ultimate Vacuum
6 mbar (abs.)
Operating Pressure
0.1 bar
Pump Head Material
TFM PTFE
Diaphragm Material
PTFE-Coated
Valve Material
FFPM
Hose Connections
ID 9.5-8, PVDF
Protection Class
IP30
Permissible Ambient Temperature
5°C to 40°C
Dimensions (W x H x D)
6.9 x 9.4 x 11.3 in. (17.7 x 24 x 28.9 cm)
Weight
24.9 lb. (11.3 kg)
Electrical Requirements
100-240V, 50/60Hz, 100W

Product description

Compact, oil-free pump for aggressive gases; ATEX compliant, maintenance-free.

KNF LABOPORT N 840 G Diaphragm Pump

Ultimate Vacuum 6 mbar Maximum Flow Rate 34L/min (2.04 m3/h) Protection Class IP30

Features

  • Adjustable speed control
  • ATEX compliant to (Ex) II 2/-G IIB+H2 T3 internal atmosphere only
  • Ideal for extremely aggressive/corrosive gases and vapors
  • Chemically-resistant PTFE/FFPM flowpath
  • Clean, 100% oil-free operation
  • Compact, quiet and reliable
  • Maintenance-free
  • Small footprint to optimize workspace

The KNF LABOPORT N 840 G Diaphragm Pump is a chemically resistant, compact and oil-free diaphragm vacuum pump with manual speed control for adjusting the pump capacity to your specific application. It features a gas ballast, PTFE/TFM heads, PTFE-coated diaphragms and FFPM valves. Suitable for a wide range of Laboratory applications including extremely aggressive/corrosive gasses and vapors.

INCLUDED: The KNF LABOPORT N 840 G Diaphragm Pump includes:

  • Power Cord
  • Operator's Manual
  • Manufacturer's Documentation
  • 2 Year Manufacturer's Warranty

Why Questpair exists

Lab equipment markets are fragmented. Buyers spend weeks calling distributors, comparing quotes, and verifying supplier reliability. Sellers struggle to reach global research labs.

We built Questpair to fix this. Every supplier on the platform is verified before listing. Every quote you receive comes from a real, vetted seller. AI prepares your case in minutes, then a real specialist takes over.

We're an independent team based in The Netherlands, working with research labs and procurement teams across Europe and worldwide.

Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Yes. Every verified supplier states which service partners cover the instrument, and we list that alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.

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Can't find the exact configuration?

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Last updated 19 October 2026