Frequently Asked Questions

E-Pro® Electric Valve Closure System

MaxPro™ RA Valve Closure System

UniPro™ Valve Closure Systems

Powell Valve Closure Systems - Do They Work?

Technical Documents about Valve Closure Systems

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

Frequently asked questions, technical topics, and more.

Electric Shut Off Systems for Small Containers
Pneumatic Shut Off Systems for Small Containers
Pneumatic Shut Off Systems for Large Containers with Plug-Type Valves
Pneumatic Systems for Large Containers with Ball-Type Valves
 


Have a unique application? Powell may have a customized solution.

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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Propane (C3H8) Emergency Shutdown System

About Propane

Propane is a member of the family of liquefied petroleum gases (LPG). It is a colorless, flammable gas with a skunk-like odor at standard temperature and pressure. It is a liquid when stored under its own pressure and flashes to a gas immediately upon release to the atmosphere. It is an asphyxiant and can exhibit anesthetic properties at high concentrations. Continued inhalation can lead to nausea and death. Prolonged contact with evaporating liquid can cause localized freezing and frostbite.

Propane is transported in pressurized containers and tank cars using angle plug valves.

Synonyms: Dimethylmethane, LP-Gas, Liquified petroleum gas (LPG)

Accidental Release of Propane

In the event of an accidental release of propane, evacuate the immediate area. Propane is easily ignited and is heaver than air. It is important to eliminate any possible sources of ignition and to provide maximum ventilation. If possible without risk, shut off the source of propane.

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

It is possible to prevent an accidental release of propane. 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 both small to large container sizes.

For 150 lb Cylinders and Ton Containers
Electric
Pneumatic
For Large Containers Ranging from 20-Ton Bullet Tanks
to 90-Ton Railcars
Pneumatic
For Plug Type Angle Valves
For Ball Type Angle Valves