KNF LABOPORT vacuum pump system SH 840 G
The KNF LABOPORT SH 840 G vacuum pump system is a robust, chemically resistant diaphragm pump that is particularly suitable for demanding laboratory applications where high vapor and condensate compatibility is required. Thanks to its oil-free operation and resistance to aggressive gases and vapors, it offers clear advantages over many conventional vacuum pumps. Similarly equipped products such as the [KNF LABOPORT SC 820 G] also represent efficient and flexible vacuum solutions for laboratories, so that different models can be compared for specific requirements.
Varied application options and technical details
This vacuum pump has a modular design and can therefore be expanded depending on laboratory requirements. In addition to a chemical-resistant design thanks to the TFM PTFE pump head and PTFE-coated diaphragms, it is suitable for pumping acids, bases or other aggressive substances. An integrated gas ballast valve helps to reduce condensation in the pump head. Thanks to its speed control, the performance of the system can be precisely adapted to different application scenarios.
Important technical data at a glance:
- Delivery rate: 2.04 m³/h (at atmospheric pressure)
- Ultimate vacuum: 6 mbar absolute
- Operating voltage: 100-240 V (50/60 Hz)
- Power output P₁: 100 W
- Protection class: IP30
- Weight: 14.1 kg
- Hose connection: Inlet for ID 8-9.5 mm, outlet for ID 10 mm
- Ambient temperature: +5 to +40 °C
In addition, a powerful condenser is included as standard, which efficiently condenses out gaseous substances and thus reliably protects the system from excessive humidity. Thanks to membrane technology, this model works absolutely oil-free and can convey, evacuate and compress without contamination. The integrated 3-color status display enables rapid error detection in everyday laboratory work, while a thermal switch and a mains fuse ensure additional operational safety. If a higher operating pressure is required, you can take a look at the [KNF LABOPORT N 820.3 FT.18], which offers similar material resistance but with different performance parameters.
Certifications and standards
The pump is typically CE marked and therefore meets European health and safety requirements. In many laboratory environments, compliance with directives such as RoHS or WEEE is relevant, whereby the design of this system has been designed for professional use and can meet common EU-specific standard requirements.
Application examples
- Distillation of highly corrosive media: Thanks to the PTFE-coated membrane, the device is ideal for evacuating solvents such as acetone, dichloromethane or mixtures containing AgNO₃.
- Filtration: Thanks to the stable flow rate of up to 34 l/min, larger volumes of liquid can be filtered quickly without causing fluctuations in the vacuum level.
- Rotary evaporation: The ultimate vacuum of 6 mbar allows efficient removal of light to medium volatile substances, for example in pharmaceutical synthesis.
- Drying of samples: Whether in vacuum ovens or desiccators, the reliable pump performance ensures short drying times and reduces the risk of contamination from oil residues.
FAQ
How can the speed control be adjusted for different processes?
The pump has an integrated speed control, which can usually be set via a simple control panel. Depending on the model, the controller can also be integrated into external automation processes, for example via digital interfaces.
What maintenance work is required for oil-free diaphragm pumps?
Since the system operates oil-free, there is no need for oil changes or oil-related maintenance. Nevertheless, the condition of the diaphragms, valves and hose connections should be checked at regular intervals.
Can the pump be in operation around the clock?
Continuous operation is possible in many applications. However, depending on the process, temperature and pumped medium, regular breaks to cool down are recommended in order to reduce wear and increase the service life of the pump diaphragm.
How to proceed with highly condensing media
For highly condensing media, it is advisable to use the integrated gas ballast valve and ensure that the downstream condenser is emptied regularly. This further reduces condensate formation in the pump head.
Conclusion
This vacuum pump system combines chemical resistance, modular expandability and high-performance diaphragm technology. It is therefore suitable for a wide range of laboratory processes in which aggressive gases or vapors and high purity requirements for the end product play an essential role. With its integrated speed control, reliable vapor compatibility and oil-free design, it clearly stands out from conventional pump sets. Laboratories that rely on precise, hygienic and durable vacuum technology benefit from a comprehensive, well thought-out concept that opens up a wide range of possible applications.
