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Scully

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Scully Signal Company is an engineering and manufacturing company established in 1936 and based in Massachusetts, USA. With customers like BP, Exxon/Mobil, Delta Airlines and Union Pacific, Scully is the premier brand name in the transport and storage of petroleum and liquid chemicals. Scully are market leaders in: petroleum, railcars / railways / trains, aviation, chemical, government / military / municipal, food & beverage, heating oil and lube oil.

Scully's core systems include overfill prevention, retained product monitoring, vehicle grounding, level alert notification and vehicle to terminal communications.

Other related and more recent inventions/offerings include remote fuel site communications, delivery equipment, tank gauging, transfer line & hose connections and automated fueling systems.

Scully Electronic Storage Tank Faylsafe® Overfill Prevention and Liquid Level Control Systems

Provide Dynamic Self-Checking® monitoring of, and overfill alarms for, storage tanks. Scully Storage Tank Systems also provide for the capability of controlling pumps and valves for immediate and automatic shutdown of product flow.


Scully Electronic Storage Tank Faylsafe® Overfill Prevention and Liquid Level Control Systems
Scully systems are the number one choice worldwide for overfill prevention, grounding, and vehicle identification safety at bottom- and top-loading terminals
  • Control fills and eliminate spills of petroleum and liquid chemicals into tank trucks and rail tank cars
  • Capable of monitoring tank trucks with up to eight compartments when equipped with two-wire sensors or 15 compartments when equipped with five-wire sensors
  • Superior system compatibility and performance when connected to tank trucks or rail tank cars outfitted with Scully sensors

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Scully Electronic Terminal Systems

Provide Dynamic Self-Checking® overfill protection, as well as grounding verification for bottom loading terminals which load petroleum and liquid chemicals into tank trucks and rail tank cars. These systems control fills and eliminate spills of tanker trucks and work best with tank trucks outfitted with sensors pioneered by Scully.


Scully Electronic Terminal Systems

The most advanced terminal overfill prevention and ground verification system available.

  • The only control system that offers overfill prevention, static grounding, and vehicle identification all-in-one unit
  • The ultimate in terminal loading safety with a patented design that continuously monitors the relay contacts—for petroleum and chemical loading racks
  • Incorporates Dynacheck® Dynamic Self Checking® circuitry for overfill prevention, ensuring that every critical component is automatically and continuously checked for maximum loading safety
  • This includes the control unit, wiring, and sensor circuitry, and should a fault be detected, it signals a loading shutdown to prevent product from overfilling
  • Over 15 years of proven performance in the field—the number one choice worldwide

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Scully Electronic Tank Truck Systems

Provide Dynamic Self-Checking® overfill protection, as well as grounding verification for tank trucks that carry/haul petroleum and liquid chemicals. IntelliCheck®2, an on-board overfill prevention and retained product monitoring system for tank trucks and refuelers, is the flagship of Scully's Electronic Truck Product line that features Dynacheck®, Scully's patented, automatic and continuous self-checking circuitry.


Scully Electronic Tank Truck Systems

The leader in Dynamic Self-Checking® overfill protection, grounding verification, and vehicle identification systems for bottom and top loading petroleum and chemical tank vehicles

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Scully offers complete tank trailer/road tanker safety and information systems to prevent overfills, detect retained product, ensure your vehicle is at the same ground potential as the loading rack, and verify identification information.

  • SAFETY: Only Scully systems offer Dynacheck® automatic and continuous self-checking, and the longest running safety record in the industry. Protect your people and your operations with the safest tank vehicle loading safety systems available.
  • RELIABILITY: Scully products out-perform and out-last every other system on the market. It’s why we are the only company to offer a 5-year warranty on our overfill prevention sensors.
  • COMPATIBILITY: Only Scully transportation equipment is 100% compatible with Scully Loading Rack Control Units. Why risk using another system that may not be fully compatible?

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Scully Tank Protection Systems

Scully Signal is the world leader in fail-safe overfill protection for petro-chemical road tankers and fixed storage tanks. It is standard equipment in use at most New Zealand fuel terminals. Scully employs self checking failsafe technology in all its designs.


Scully Tank Protection Systems

Protect your fueling operations with a complete line of Scully Liquid Safety Systems

  • No operator on top of the vehicle ensures reduced liabilities and lower insurance costs
  • Hatch remains closed, eliminating potential environmental and safety hazards
  • Replaces older mechanical jet level sensors or floats that can fail at any point with no detection
  • Dynacheck® Self-Checking circuitry means your Scully overfill prevention system checks itself 30 times per second to prevent human error, and if any sensor or component failure is detected, it automatically shuts down the operation
  • One connection does it all—overfill protection, static grounding, and Dead Man Control.
  • An Audio Interface Module with alarm is available for applications such as U.S. Navy Refueler and Defueler operations where an audio alert is required

In some applications, a Scully IntelliCheck® onboard control unit is used to control functions such as advanced interface modules, and bottom loading or defueling shutdown controls. Vehicles can be outfitted with an independent dual level system (high & high/high). The high-level sensor is controlled at the fill stand by a Scully control unit. The high/high sensor can be installed as a secondary shut down method controlling the vehicle’s bottom loading valves. If the valve or pump fails to shut down fuel flow at the fill stand, the secondary vehicle system will take over and shut down the vehicle’s bottom loading valve. The U.S. Air Force has standardized on this system.

Vehicle Identification Systems, which communicate via the overfill system plug to the control unit at the fill stand, can also be used to prevent mixing of different fuel grades.

Scully aviation systems have been standard equipment on U.S. Navy refuelers and Air Force R-11 refuelers for many years and are also in use in the commercial aviation market.

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