Powell Fabrication & Manufacturing, Inc.

Gas Cylinders, Ton Containers, & Automatic Valve Operators


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FAQ about the MaxPro RA Valve Closure System

How much air pressure is required? How does it mount on the valve? Can it accommodate a vacuum regulator (chlorinator)? How does it detect a leak? More...

 

Compressed Gas Valves

Various Cylinder, Ton Container, and Railcar Valves compatible with both Electric and Pneumatic actuators.  More...

 

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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MaxPro™ RA Emergency Shut Off System for Gas Cylinders & Ton Containers

MaxPro RA Pneumatic Valve Closure System on Ton ContainersAvoid production slowdowns, 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 reportable 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

PNEUMATIC

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.

ADAPTABLE

Max Pro Valve Closure System

The MaxPro™ RA's unique, mounting bracket can be mated to any of several available valve adapters - allowing the system to be used on valves commonly found on chlorine cylinders, chlorine ton containers, sulfur dioxide cylinders, sulfur dioxide ton containers, anhydrous ammonia cylinders, anhydrous ammonia ton containers, liquid hydrogen chloride cylinders, liquid hydrogen chloride containers, and many more. Following is an example of the various kinds of valves the MaxPro RA system is compatible with:

Ceodeux Chlorine or Sulfur Dioxide Cylinder Valve (USA/Europe) HSB Compressed Gas Valve (Egypt) Parva Brazil Compressed Gas Valves (South America) SA China Compressed Gas Valves
Sherwood Anhydrous Ammonia External Thread Compressed Gas Valves (USA) Sherwood Anhydrous Ammonia Internal Thread Compressed Gas Valves (USA) Sherwood Compressed Gas Valve for Chlorine or Sulfur Dioxide (USA) Sherwood Liquid Hydrogen Chloride Valve (USA)

VERSATILE

Applicable to a variety of valve designs and hazardous chemicals in 150lb cylinders and ton containers, including but not limited to:

1,3-Butadiene Anhydrous Ammonia Bromomethane Butane
Carbon Dioxide Chlorine* Chloroethane Chloromethane
Dimethylamine Ethylene Ethylene Oxide Hydrogen Chloride
Hydrogen Cyanide Hydrogen Fluoride Methyl Mercaptan Propane
Sulfur Dioxide Trimethylamine Vinyl Chloride Monomer

*Designed in accordance with The Chlorine Institute’s guidelines for valve closure systems.

Also accommodates vacuum regulators (chlorinators).

EASY TO INSTALL

Designed for both ton containers and 150-lb gas cylinders. Unique mounting bracket easily attaches and detaches from the valve stem in seconds, without tools.

DEPENDABLE

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.

POWERFUL

Automatically responds to any alarm input, instantly closing valves with 40 lb-ft of torque.

LIGHTWEIGHT & COMPACT

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.

LOW MAINTENANCE

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.

System Components

Every component of the MaxPro™ RA Pneumatic Valve Closure System is engineered to be more versatile, efficient, and reliable than alternative units on the market. The system includes the actuator, air control unit, control panel, mounting bracket, and air supply hose.

Designed for Versatility

This patented design consists of a pneumatic drive with a spring-loaded coupler designed to accommodate valve stems of varying lengths.

Durability

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.

Maximum Control

UniPro Control Panel

The MaxPro™ RA Control Panel automatically activates the actuator to close the valve in the event of a gas leak, 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 — simultaneously.

MaxPro RAThe 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.

Air Control Unit

The air control unit supplies the proper amount of clean, pressurized air to the system.

 

UL - CUL Approved

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.

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