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Frequently Asked Questions
FAQs / General / What is the difference between a Class B and a Class N autoclave?

What is the difference between a Class B and a Class N autoclave?

The primary difference between Class B and Class N autoclaves is how they remove air from the chamber prior to sterilization. Class B autoclaves utilize a vacuum pump to completely remove air from the chamber, which enables steam to better penetrate the load. Class N autoclaves use steam from a boiler or generator to create downward displacement, which pushes air out of the chamber.

Unlike a Class B autoclave, a Class N autoclave does not guarantee 100% air removal. For this reason, Class B autoclaves are preferable for more difficult loads that contain porous or hollow materials. Class N autoclaves are suitable for most standard applications.

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