Electric Shut Off Systems for Small Containers
Pneumatic Shut Off Systems for Small Containers
Pneumatic Shut Off Systems for Large Containers with Plug-Type Angle Valves
Pneumatic Systems for Large Containers with 1/4 Turn Ball-Type Angle Valves

Frequently asked questions, technical topics, and more.


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.

Powell Durability Testing

Threshold Pressure and the UniPro™ Torque Limiting Valve Adapter for Soft Seat Valves

Available Valve Adapters for UniPro™ Valve Closure System

Automated Shut Off Valves on Flexible Transfer Hoses: Why Mount An Emergency Shutdown System Actuator On A Tank Car Valve?

 

 

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UniPro Explosion Proof Motion Detector System

The UniPro™ Explosion Proof Motion Detector System is designed to mount on the loading/unloading platform in close proximity to the tank car being serviced. The spool holds 25 feet of stainless steel braided cable and the locking mechanism on the reel prevents excess cable from unwinding in the event of tank car motion. The cable can be routed around any solid object on the tank car and clipped to the pin underneath the reel. The pin is inserted through a rotating fixture above an explosion proof
(Class 1, Div 1) switch.

UniPro Explosion Proof Motion Detection System

How the Motion Detection System Works

In the event of tank car motion, the pin is pulled free, releasing the switch. The rotating fixture assures that the pin will be pulled straight out regardless of the direction of tank car motion.

The signal from the switch activates the UniPro™ Valve Closure System,
which quickly responds by closing the valve within seconds.

 

"Unchocked Railcar"

"Runaway Train"

UniPro System Components

Valve Adapters for UniPro Valve Closure System
Valve Adapters

UniPro Air Control Assembly
Air Control Assembly