Centrifuges with nitrogen purging

Herolab offers centrifuges with nitrogen purging for application-specific processes. Nitrogen flows through the centrifuge chamber to reduce its oxygen content. Pressure and oxygen monitoring control start enable and monitor the chamber atmosphere during centrifugation.

Purging and monitoring

• Purging sequence: The motor and other electrical loads are switched off before purging. Nitrogen enters the chamber from below; purge gas exits at the top.
• Start enable: A pressurisation system and an oxygen sensor monitor the chamber atmosphere. An incorrect gas supply, such as compressed air instead of nitrogen, prevents start enable.
• Monitoring during operation: The pressurisation system and oxygen sensor have separate power supplies. If either system reports a fault, a safety relay disconnects the relevant live components. The rotor then coasts unbraked to a standstill.
• Power failure: Bypass purging maintains nitrogen flow when mains power is lost. This requires the corresponding instrument configuration and an available nitrogen supply.

HiCen TR with nitrogen purging

Purge and monitoring unit

Configuration for your process

Nitrogen purging alone does not authorise centrifugation of flammable or explosive substances. Suitability must be assessed for the sample medium, operating conditions and specific instrument configuration.

For technical selection, please provide:

• sample medium and any solvents present
• sample volume, vessel material, closure and required rotor
• required speed or relative centrifugal force (RCF), and temperature
• available nitrogen supply and installation conditions

Gas supply, monitoring limits and required protective functions are specified using these details. The illustrations show a HiCen TR with nitrogen purging as an example configuration.

• Phone: +49-(0)6222-5802-0
• Fax: +49-(0)6222-5802-34
• Email: info@herolab.de

• Phone: +49-(0)6222-5802-13
• Email: info@herolab.de