Proper Operation of Vacuum Based Equipment

Overview

Source: Robert M. Rioux, Ajay Sathe & Zhifeng Chen, Pennsylvania State University, University Park, PA

Vacuum is required for a number of laboratory procedures. This is most routinely achieved in the laboratory by the use of vacuum pumps. In addition to working at low pressures, vacuum pumps can also be used to enable rapid changing of the atmospheres in a reactor or flask by evacuation and backfilling.

Procedure

1. Use of Personal Protective Equipment

Safety glasses, lab coats, and face shields must be utilized when working with or near a vacuum apparatus.
A blast shield must be utilized to prevent flying glass or debris resulting from a sudden change in pressure.

2. Use of Proper Tubing and Equipment

Always use tubing, glassware, and other equipment that is rated for use with vacuum. Improper use can result in material failure and cause explosion/implosions.
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Application and Summary

Operations requiring vacuum have multiple hazards associated with them. Vessel implosion can lead to flying glass and other materials, the release of chemicals to the working environment, and potentially fire due to the condensation of liquid oxygen. Vacuum operations should be set up properly and only operated after potential risks have been identified and properly mitigated.

References

NRC (National Research Council). Prudent Practices in the Laboratory. Handling and Management of Chemical Hazards. National Academy Press: Washington, DC, 2011.
Laboratory Vacuum Pump Buyers' Guide, 2012.

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