Sulfur Hexafluoride (SF6) is an excellent gaseous dielectric for high voltage power applications. It has been used extensively in high voltage circuit breakers and other switchgear employed by the power industry. Applications for SF6 include gas insulated transmission lines and gas insulated power distribution substations. The combined electrical, physical, chemical and thermal properties offer many advantages when used in power switchgear. Some of the outstanding properties of SF6 which make its use in power applications desirable are:

  • high dielectric strength
  • unique arc-quenching ability
  • excellent thermal stability
  • good thermal conductivity

However advantageous the above properties are, Sulfur Hexafluoride is considered to be a fully fluorinated compound (FFC). Since FFC’s have atmospheric lifetimes of up to 50,000 years, these potent greenhouse gases could contribute significantly and, essentially, permanently to global warming if emissions continue to grow. For example, lets compare the global warming potential of CO2 and SF6. CO2 has a global warming potential of 1, whereas SF6 has a global warming potential of 24,900!! Also, over the past year or so, the price of new SF6 gas has increased in price by as much as 600%!! Due to the above reasons, SF6 is used mostly in applications that allow reclamation as opposed to using it on equipment that requires release of the gas, only to be re-filled with virgin SF6. ENERVAC produces a complete line of SF6 recovery and test equipment, from full sized gas reclaimers down to small decomposition detectors.

SF6 Gas Servicing Equipment

SF6 Gas Recovery Unit (GRU-4)

  • Convenient and portable handcart mounted SF6 Gas Recovery Unit.
  • Extremely easy to operate.
  • Ideally suited for consolidating partially-used SF6 bottles.
  • Purifies, dries and filters SF6 to 0.1 micron during recovery and re-filling.


SF6 Gas Recovery Unit (GRU-7)

  • Fast SF6 Gas Recovery.
  • Easy single valve operation.
  • 180 lb. (82 kg.) available on-board storage capacity.
  • Ideal for use in outdoor applications.


SF6 Gas Recovery Unit (GRU-8)

  • Fast SF6 Gas Recovery.
  • Easy single valve operation.
  • Up to 600 lb. (300 kg.) available on-board storage capacity.


SF6 Gas Transfer Unit (GTU)

  • Low cost solution for SF6 gas recovery.
  • Small, portable and easy to use.
  • Exclusive color change moisture indicator displays SF6 “dryness”.
  • High pressure liquefaction of SF6.


SF6 Gas Servicing Cart (E736A)

SF6 Gas Servicing Cart (E736A)
  • Full sized line with storage capacities up to 4,000 lbs (1,800 kg).
  • Oil-Less, Oil-Free and standard compressor options available.
  • Fully automatic or manual operation available.
  • Specifically suited for larger sized circuit breakers.


SF6 Gas Storage Tank (E736T)

  • Sizes to suit every need, up to 4,000 lbs (1,800 kg).
  • Tanks are certified to ASME Code.
  • Stationary or Mobile units available.
  • Internals are specially coated to prevent corrosion.


SF6 Gas Analyzers and Accessories

SF6 Gas Analyzers and Accessories

  • A wide variety of SF6 Gas Accessories are available, including Gas Leak Detectors, Filter-Purifiers, Bottle Heaters, and Safety Disposal Suits.


SF6 Evacuation & Refill Unit (ERFU-2)

  • Single valve operation
  • Large tires for easy movement over gravel yards
  • Permanently mounted high capacity, high vacuum pump
  • User adjustable regulated gas refilling