Thursday, September 28, 2017

Breathing Air Purifiers

breathable air purifier system
A breathing air purifier unit processes
compressed air, making it suitable for respirators.
Image courtesy SPX Pneumatic Products
There are many instances throughout science and industry where tasks must be performed by human operators in environments without breathable air. In many of those cases, it is necessary to provide a positively pressurized enclosed space around the operator's face to isolate the breathing passages from potentially harmful vapors, dust, or pathogens in the work area.

Applications in the petrochemical industry, as well as asbestos abatement, paint and coatings, tank cleaning and more have specific jurisdictional requirements for the provision of breathing apparatus for worker protection. A compressed air source is processed as it passes through a purifier which imposes a six stage filtration process on the compressed air inlet prior to supplying the breathable air to safety hoods or masks.

  • Removal of solid and liquid particles or droplets greater than 1.0 micron.
  • Oil and liquid aerosol removal down to 0.1 micron.
  • Water vapor removal
  • Reduction of carbon monoxide level
  • Second particulate filtration stage to 1.0 micron
  • Activated carbon removes trace odors, oil vapor, and other components
Analyzing and monitoring the outlet air quality from the purifier unit is a good practice, to assure that target levels of oxygen, carbon monoxide, moisture, and carbon dioxide are maintained. OSHA and other jurisdictional bodies specify allowable levels for certain potentially harmful gases. The quality of the inlet air should be carefully assessed and protected during operation, since it is a primary determinant of the outlet air quality.

Share your process requirements with a pneumatic system specialist, combining your own knowledge and experience with their product application expertise to develop an effective solution.