Frequently asked questions, technical topics, and more.
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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.
Pneumatic Valve Closure Systems for Large Containers
The only emergency valve closure technology designed for 20-ton bullet tanks to 90-ton railcars, this patent-pending system prevents reportable releases of pressurized hazardous gases at the source. Improve your Risk Management Planning (RMP) scenarios with a pneumatic-powered system that not only promises easy installation and low maintenance, but also superior performance and reliability.
On occasion, customers have applications that make use of modified or unique hardware. In these cases, Powell offers an Application Evaluation Service.
UniPro™ Standard Valve Closure System
Designed to close a variety of plug-type angle valves on railcars and tank trucks with dome sizes between 24 and 42 inches in diameter. Automatically responds to any alarm input, closing valves with 120 lb-ft of torque in less than 10 seconds. More...
UniPro™ R (Reversible) Valve Closure System
The only reversible emergency valve closure technology designed for 20-ton bullet tanks to 90-ton railcars, this patent-pending system prevents reportable releases of pressurized hazardous gases at the source. Plus, the UniPro™ R system is easily "reversible" - helping reduce operator effort and potential injuries. More...
UniPro™ LT (Low Torque) Valve Closure System
The only low-torque emergency valve closure technology designed for 20-ton bullet tanks to 90-ton railcars, this patent-pending system prevents reportable releases of pressurized hazardous gases at the source. Plus, the UniPro™ LT system is specifically designed for "low-torque" valves to prevent damage to the valve seat. More...
UniPro™ LTR (Low Torque, Reversible) Valve Closure System
The only low-torque, reversible emergency valve closure technology designed for 20-ton bullet tanks to 90-ton railcars, this patented system prevents reportable releases of pressurized hazardous gases at the source. Plus, the UniPro™ LTR system is specifically designed for "low-torque" valves to prevent damage to the valve seat. More...
UniPro QT™ (Quarter Turn) Valve Closure System
The only quarter-turn emergency valve closure technology designed for 20-ton bullet tanks to 90-ton railcars, this patent-pending system prevents reportable releases of pressurized hazardous gases at the source. Plus, the UniPro™ QT system is uniquely designed for "quarter-turn" ball-type valves. More...
