Powell Fabrication & Manufacturing, Inc.

Ethylene Oxide Cylinder Shutoff (Valve Emergency)

Frequently Asked Questions

Vacuum Regulators

Powell can design your shut off system to accommodate vacuum regulators. More.


Frequently asked questions, technical topics, and more...


Available Systems

Ethylene Oxide Valves

Various Ethylene Oxide Cylinder, Ton Container, and Railcar Valves compatible with both Electric and Pneumatic actuators.  More...


UL-CUL Approved

Powell Valve Closure System control panels (UniPro™, 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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Ethylene Oxide Valve Shutoff (EtO)

About Ethylene Oxide

Ethylene Oxide is a colorless, flammable gas at standard temperature and pressure. Exposure to EtO can cause blurred vision and eye pain, difficulty breathing, dizziness, nausea, headache, convulsions, blisters and vomiting. It is a known carcinogen and has also been linked to spontaneous abortion, genetic damage, nerve damage, peripheral paralysis, muscle weakness, and impaired mental ability.

It is used in the production of solvents, antifreeze, textiles, detergents, adhesives, pharmaceuticals and polyurethane foam. Ethylene Oxide is shipped in pressurized tank cars using angle plug or angle ball valves.

Synonyms: Dihydrocodeine, Dimethylene Oxide, EO, ETO, 1,2-Epoxyethane, Epoxyethane, Ethene Oxide, Oxacyclopropane, Oxane, Oxirane.

Accidental Release of Ethylene Oxide

In the event of an accidental release of Ethylene Oxide, avoid heat, flames, sparks and other sources of ignition. If possible without risk, stop the flow of gas to the leak.

Powell Emergency Valve Closure Systems are designed to prevent significant releases of ethylene oxide. In the case of an accidental release, the emergency shutdown system will immediately close the ethylene oxide container valve (EtO Valve), stopping the flow of the gas regardless of where the EtO leak occurs downstream of the container.

To prevent ignition source sparks from being generated by contact between UniPro™ Valve Closure actuators and ethylene oxide platform or container components, spark resistant materials are used in the sensitive areas of the UniPro™ actuators. Valve handle adapters utilize brass and aluminum. Clamps used to fasten the actuators and hose manifolds to steel dome walls are fabricated from aluminum. Where UniPro™ actuators must operate in close proximity to the actual valve outlets, as with the UniPro™ QT actuator for quarter turn ball valves, bronze is used where metal to metal wear contact is present and aluminum is used for the actual body of the actuator. No structurally strong metal is truly spark-proof. However, by utilizing these spark resistant materials, the UniPro™ family of actuators and accessories provide a minimum risk environment when working around explosive fluids. All UniPro™ valve actuators are powered by pneumatic motors utilizing composite air motor vanes. These produce neither sparks or heat and can be energized with inert nitrogen to further reduce the danger of ignition.

It is possible to prevent an accidental release of Ethylene Oxide. 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 systems for 150 lb Ethylene Oxide Cylinders, Ton Containers, Railcars, Tank Cars, and Bullet Tanks.