Sulfur Dioxide Emergency Shutdown System

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. Smaller 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, dioxidosulfur, sulfur superoxide, Fermenicide liquid, Fermenicide powder, sulfur oxide, oxosulfane oxide, dioxide, sulfurous acid anhydride, Caswell No. 813.

Accidental Release of Sulfur Dioxide

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 close the container valve, stopping the flow to the leak 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.

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Shutdown Systems for Various Container Sizes

Powell is the only manufacturer to offer both pneumatic or electric systems for both small to large container sizes.

For 150 lb Cylinders and Ton Containers
Electric		Pneumatic
E-Pro® Emergency Valve Closure System		MaxPro RA™ Emergency Valve Closure System
For Large Containers Ranging from 20-Ton Bullet Tanks to 90-Ton Railcars
Pneumatic
For Plug Type Angle Valves
UniPro™ Standard	UniPro™ R (Reversible)	UniPro™ LT (Low Torque)	UniPro™ LTR (Low Torque Reversible)
For Ball Type Angle Valves
UniPro™ QT ( Quarter Turn)