Inert Gas Lab Ovens – Do I Need One?

Cascade TEK offers an option for inert gas or (sometimes called GN2 Purge) as an option on our Forced Air Lab Ovens.  Here’s a quick rundown on when to consider using this feature.
What Does an Inert Gas Lab Oven Do? 
GN2 purge creates an “inert atmosphere” which basically means a non-corrosive, non-condensing, non-oxidizing condition inside the oven.  The action of purging will displace oxygen and other impurities in the ambient air.
Why Should I Use an Inert Gas Lab Oven?
Use an inert gas oven when you want to avoid condensation or oxidation on the parts inside the oven.  Often moisture within the ambient air (especially in locations with high humidity) can create condensation on your parts. Oxidation is generally detectable by a discoloration seen on the product.
How Does Purging Work?
Generally, the purge cycle should force a volume of inert gas (Argon, Nitrogen, Clean Dry Air) equal to 5 to 10 times the volume of the oven. You will need to connect a source of inert gas to a connection point on the oven.  Inlet Supply should be rated at 80 PSI. A slight positive pressure should be maintained while running up to the set point temperature and throughout the heating portion of operation. GN2 atmosphere should be maintained until the work load is below the temperature at which oxidation will occur.  125°C is considered the highest / safe temperature. Most materials can be removed from the oven at this temperature without discoloration.
Check out the PDF below for additional details on inert gas ovens from Cascade TEK.