Nitrogen N2
Definition:
- Gaseous nitrogen is mounted in pipes in the buildings, being supplied from the Dept. of Physics and Astronomy, building 1523.
Function:
- The purity is 5.0 (99.999%)
- The pressure in the pipes is 7.5 bar
- The oxygen content is max. 3 ppm
Application:
- Nitrogen is used as an inert gas.
- A stop valve is used to open and shut off the gas.
- A reduction valve is used to control the pressure.
- A needle valve is used to control the flow.
- Stop valve, reduction valve, and needle valve are often assembled in one:
FAQ/Typical errors:
- It is very important to use the valves correctly.
- If you have to lead gas bubbles through a setup, the pressure is to be set at f.inst. 1 bar using the reduction valve, and the needle valve is used to regulate to a suitable flow.
- If gas is added to a closed container, the pressure in the container will over time increase up to the setting of the reduction valve, no matter how low a flow is set using the needle valve. This can blow up your glass equipment or hoses, or shoot off plugs or septae.
- Remember to use a bubbler or a balloon in order to protect the setup against excess pressure.
Contact:
Anders Damgaard (Workshop at Physics) - mobile 3076 0788 eller mail: asd@phys.au.dk
Allan Madsen - mobile 2899 2015