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Ideal for aggressive gases and vapors, compact, expandable, and 100% oil-free.
The KNF Laboport SR 840 G is a chemical-resistant vacuum pump system featuring the N 840 G diaphragm vacuum pump. It includes a base plate and two separator bottles on the suction and pressure sides. With exceptional compatibility with steam and condensate, this system is designed to handle extremely aggressive or corrosive gases and vapors.
Technical features include a maximum flow rate of 20 l/min, a final vacuum of 6 mbar (abs.), and a maximum pressure of 0.1 bar (rel.). It also boasts a flow rate of 2.04 m³/h at atmospheric pressure and operates efficiently with fluid temperatures ranging from 5°C to 40°C. The materials include FFPM for the valve, PTFE coating for the diaphragm, and TFM™ PTFE for the pump head.
Applications include filtration, degassing, vacuum oven processes, and centrifugal concentration. The system is modular and expandable, featuring an integrated gas ballast valve and rotation speed control, all while being compact, silent, and reliable. With its 100% oil-free transfer, this vacuum pump offers pure transfer, evacuation, and compression of gases. It is an environmentally friendly solution, perfect for laboratories in need of a chemically resistant vacuum solution.
Download the data sheet for more information and accessories. Unsure which vacuum pump suits your needs? Explore KNF's guides: Vacuum Pumps for the Laboratory or The Ideal Diaphragm Pump for Every Application.
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With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.
Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options alongside the offer.
Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.
Two to six weeks, depending on refurbishment scope and whether calibration is included.
We ship to 38 countries. Crating and customs handling are quoted with the instrument.
Tell us what you need and a scientist finds it for you, usually within the hour.
Last updated 6 November 2026
€2,541 sits in the middle range pumps liquid and here. The middle half of the 365 with a price runs from €646 to €5,367.
