Smith Flow Control Launches into the Nuclear Power Industry with Flexi-Drive System

Remote drive system allows safe operation of valves located around hazardous materials

To increase the safety of working conditions for nuclear facility employees, Smith Flow Control, manufacturer of remote valve operators and safety interlock systems, provides the Flexi-Drive valve operating system.

Flexi-Drive for Nuclear Power Industry

The Flexi-Drive is a cable-driven remote operator for valves in inaccessible or hazardous locations.  It can operate valves as far as 200 feet away, accommodating 540 degrees of bends in the cable run.  The Flexi-Drive replaces outdated reach rod and chain systems, and is designed to increase the safety and functionality of nuclear applications by reducing exposure of operating personnel to hazardous materials. 

According to the Nuclear Regulation Commission (NRC) 10 CFR part 20, nuclear facility personnel are limited to 5 REM or 5,000 millirem of radiation exposure per year for those who work with and around radioactive materials, with downtime required after this limit has been reached, and most nuclear plants set their radiation exposure limits lower than the NRC limit.  By decreasing the human exposure levels in radioactive areas, mandatory downtimes are cut to a minimum.

The Flexi-Drive is a versatile product consisting of two stations joined by a unique patented linear drive cable.  The flexible cable system can be passed around and through walls, bulkheads, floors and any other obstacles to reach the host valve. 

The Flexi-Drive is completely sealed and permanently lubricated so it never requires maintenance.  It has a service life of 20,000 valve cycles and is designed to withstand the most severe conditions, ranging from -65 degrees to +400 degrees Fahrenheit and will even work under water to a depth of 50 ft.

For more information on the Flexi-Drive or to request a quote, contact Smith Flow Control’s nuclear distributor, the Dupill Group ( at 724-468-3271 or via e-mail at

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