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Shut Off Systems for Hazardous Gases Such as Propylene About Propylene (CH2CHCH3)Propylene is a colorless gas with an olefin odor at standard temperature and pressure. It is a simple asphyxiant and is very flammable. Skin contact with evaporating liquid propylene can cause local freezing and frostbite. Propylene is used in the manufacture of plastics and in biodegradable, non-toxic antifreeze. It is shipped in pressurized containers and tank cars. Propylene Valve Closure Systems (Shutdown Systems)Powell Emergency Valve Closure Systems are designed to prevent significant releases of hazardous gases like propylene. In the case of an accidental release, the emergency valve closure system will close the valves in 10 seconds or less, effectively preventing further release from the container. 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 both small to large container sizes.
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