Emergency Shut Off System for Gas Cylinders & Ton Containers
Avoid production slow downs, operator injury, or lengthy and expensive environmental
cleanups by stopping dangerous chemical leaks with the MaxPro™ RA Pneumatic
Valve Closure System. Designed for both ton containers and 150-lb gas cylinders,
this patented emergency shutdown system prevents non accidental releases of pressurized
hazardous gases. 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.
U.S. Patent 6,840,503
Stop Dangerous Leaks of Extremely Hazardous Gases
Where They Occur
Some valve closure systems are simply built. Ours are engineered.
Ideal for applications where air or nitrogen is readily available. Fail-closed design
operates even if AC power or air pressure is lost. Requires 90 psig.
Applicable to a variety of valve designs and hazardous chemicals, the system has
a unique mounting bracket that can be mated to any of several available valve adapters.
For use on containers of chlorine*, sulfur dioxide, anhydrous ammonia, liquid hydrogen
chloride, and other pressurized hazardous gases. Also accommodates vacuum regulators
* Designed in accordance with The Chlorine Institute’s guidelines for valve closure
Mounts on the valve body, not the yoke. This prevents any torque from being transferred
to the yoke, which could cause the lead gasket between the yoke and container valve
to fail, resulting in a dangerous leak.
Automatically responds to any alarm input, instantly closing valves with 40 lb-ft
Applicable to a variety of valve
designs and hazardous chemicals, the system has a unique mounting bracket that can
be mated to any of several available valve adapters. For use on containers of chlorine*,
sulfur dioxide, anhydrous ammonia, liquid hydrogen chloride, and other pressurized
hazardous gases. Also accommodates vacuum regulators (chlorinators).
Only 5.5 pounds. Exclusive “Right-Angle” (RA) design allows manual valve
operation with a standard wrench. Also minimizes length when installed, extending
no more than 4 inches beyond the rim of a 1-ton container.
Robust motor requires no lubrication and is completely encased by a steel cover
for protection and years of reliable service.
The MaxPro™ RA 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.
Every component of the MaxPro™ RA Pneumatic Closure System is engineered
to be more versatile, efficient, and reliable than other units on the market.
The system includes the following: actuator, air supply hose, mounting bracket, control panel, air control unit, air receiver tank, uninterruptible power supply, remote e-stop,
and chlorine wrench.
This patented design consists of a pneumatic drive with a spring-loaded coupler
designed to accommodate valve stems of varying lengths.
The actuator is constructed of aircraft-quality aluminum and high-grade carbon and
stainless steels for maximum service life. A two-step polyurethane coating provides
additional corrosion protection.
The MaxPro™ RA Control Panel automatically activates the actuator to close
the valve in the event of an accidental release, 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. A single control panel
can activate up to eight container-mounted actuators to close all eight valves —
The included 6-foot air supply hose has a safety
swing coupling to ensure a secure connection between actuator and gas supply, while
helping to prevent kinks or tangles in the hose.
The air control unit supplies the proper amount of clean, pressurized air to the
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 engineering for further information.