UniPro Standard ™
Pneumatic Emergency Valve Closure System
The only emergency valve closure technology designed for 20-ton bullet tanks to
90-ton railcars, this patent-pending system prevents reportable releases of chlorine
and other pressurized hazardous gases by shutting off the valve.
your Risk Management Planning (RMP) scenarios with a pneumatic-powered system that
not only promises easy installation and low maintenance, but also superior performance
On occasion, customers have applications that make use of modified or unique hardware.
In these cases, Powell offers an Application Evaluation
The UniPro™ Pneumatic Valve Closure System has been engineered, designed,
and field-tested to ensure reliable performance while reducing installation time,
maintenance, and material cost.
That’s Reliable Engineering.
Ideal for applications where air or nitrogen are readily available. Requires 90 psig to operate. Fail-closed
design operates even if AC power or air pressure is lost.
motor requires no lubrication, and is completely encased by a steel cover for protection
and years of reliable service.
*Designed in accordance with The Chlorine Institute’s guidelines for valve closure
Automatically responds to any alarm input, closing valves with 120 lb-ft of torque
in less than 10 seconds.
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. For use on containers of chlorine*,
sulfur dioxide, anhydrous ammonia, liquid hydrogen chloride, and other pressurized
Various valve adapters are available depending on your
particular application (torque requirements, valve handle configurations, material
hazards, spark resistance), and all easily attach and detach with a single hitch
pin. With the torque-limiting adapters, there is no need to reduce the air pressure
to potentially unreliable levels in order to prevent damaging the soft seat of low-torque
Easily mounts to the dome wall in seconds, without tools. Can be quickly removed
from the valve handle without detaching from the dome wall to facilitate manual
valve operation. Weighs just 28 pounds.
The actuator is constructed of aircraft-quality aluminum and high-grade carbon and
stainless steels for maximum service life. The housing is sealed to prevent intrusion
from dirt and water in outdoor applications, while a two-step polyurethane coating
provides corrosion protection.
The UniPro™ is designed to stand alone as a complete system, or to integrate
and interface with existing unloading components. The included air supply hose has
a safety swing coupling to ensure a secure connection between actuator and gas supply.
The UniPro™ Control Panel automatically
activates the actuator to close the valve in the event of a gas leak, car movement,
fire alarm, seismic event, security breach, process shutdown, or other monitored
condition. You can also manually activate the system by depressing the emergency
stop button on the panel.
The air control unit supplies the proper amount of clean pressurized air to the
system. Available in two sizes to operate up to six UniPro™ actuators simultaneously.
The UniPro™ Pneumatic Valve Closure System is engineered to be the most versatile,
efficient, and reliable unit on the market. The system includes the actuator, control
panel, air control unit, and air supply hose.
The UniPro™ name represents a whole family of pneumatic actuators for railcar
and tanker applications, including the standard, reversible and low-torque models,
all designed for plug-type valves, plus a quarter-turn model specifically designed
for ball-type valves. The control panel, air control unit, and all optional system
components work with any of our pneumatic actuators.
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.