The Purafil ESD Emergency Gas Scrubber (EGS) removes entire contents of a fully-loaded chlorine or sulfur dioxide cylinder in a worst-case release scenario by neutralizing the initial 400 lb flash for the first minute and the remaining contents at 78 lb/min thereafter. The EGS exceeds the requirements of the Uniform Fire Code, Article 80, which states that the full contents of the single largest storage container must be mitigated in 30 minutes. In a release, the EGS operates accordingly:

1. The EGS is attached to a wall vent in the room containing the toxic gas cylinders. In a release, the toxic gas/air mixture from the storage room is drawn into the scrubber.

2. The EGS, available in both vertical and horizontal designs, draws or pushes the toxic gas/air mixture through the media bed, respectively.

3. At the heart of the EGS is dry-chemical media manufactured by Purafil ESD. The media converts gases into harmless solids, which remain trapped inside the pellet. The reaction occurs on the media’s surface and throughout the volume of the pellet. In the event of a toxic gas release, the reaction front will move through the EGS media column as the release proceeds. Purafil ESD offers Chlorosorb® III media for removal of chlorine gas and CSO™ media for removal of both chlorine and sulfur dioxide.

Chlorosorb III
• 15% removal capacity for chlorine
• Landfill disposable
• UL Classified Class 2
• Operates effectively in temperatures as low as -40°F

CSO
• 10% removal capacity for both chlorine and sulfur dioxide
• Landfill disposable
• UL Classified Class 2

4. The blower discharges clean air to the atmosphere. The EGS reduces toxic gas concentrations to less than 5 parts per billion at discharge.

Testing performed by:
Hurst Engineering and Research Lab
June 27, 2005.