Powell Fabrication & Manufacturing, Inc.

Sulfur Dioxide Shutdown System


Valve Closure Systems

UL-CUL Approved

Powell Valve Closure System control panels (UniPro family, MaxPro™ RA & E-Pro®) are listed by Underwriters Laboratory to UL 508A for Enclosed Industrial Control Panels. Panels are listed by Underwriters Laboratory bearing the UL & CUL mark for use in the United States and Canada markets. In applications where a CSA listed control panel in Canada is required, please contact Powell for further information.

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Sulfur Dioxide Valve Shutoff

About Sulfur Dioxide (SO2)

Sulfur Dioxide is a colorless gas with a sharp, irritating odor at standard temperature and pressure. Inhalation can cause irritation of the eyes and respiratory tract. Released to the atmosphere, SO2 readily combines with moisture to form sulfuric acid, the main component of acid rain.

Sulfur dioxide is a reducing bleach and can counter the effects of oxidizing bleaches. It is shipped in pressurized containers and railroad tank cars. Gas cylinders and ton containers use standard 660 type chlorine valves. Tank cars use any of several models of angle plug valves.

Synonyms: sulphur dioxide, sulfurous oxide, sulfurous anhydride, sulfur superoxide, Fermenicide liquid, Fermenicide powder, sulfur oxide, oxosulfane oxide, dioxide, sulfurous acid anhydride, Caswell No. 813.

Accidental Release of Sulfur Dioxide

In the event of an accidental release of sulfur dioxide, it is important to remove any sources of ignition and to shut off the source of the gas.

Powell Emergency Valve Closure Systems are designed to prevent significant releases of hazardous gases like sulfur dioxide . In the case of an accidental release, the emergency shutdown system will immediately close the container valve, effectively preventing further release regardless of where it occurs downstream.

It is possible to prevent an accidental release of sulfur dioxide . Contact us today to discuss your specific application requirements.

Back to List of Hazardous Gases

Shutdown Systems for Various Container Sizes

Powell is the only manufacturer to offer both pneumatic or electric sulfur dioxide systems for 150 lb Gas Cylinders, Ton Containers, Railcars, Tank Cars, and Bullet Tanks.