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Natural gas or process gas dehydration at low pressures, low flow rates, and / or low temperatures can be very difficult. Most conventional salt-type absorbent desiccants are unable to adequately dry gas to low water content under these conditions. 4UF was developed to meet low dew point requirements when other desiccants or glycols cannot.

4UF can be used by itself or in combination with other grades of deliquescent desiccant, such as SP or 10BF Desiccant. In some applications, consumption is optimized when the process gas flows through the lower grade desiccant prior to the highly absorbent 4UF.


*4UF is also known as Gas Dry™ Ultimate.


Features and Benefits

  • 7 lbs H2O/MMSCF gas is attainable @ 50 psig & 60°F.

  • 20 lbs H2O/MMSCF gas is attainable @ 25 psig & 80°F.
  • Gas temperatures below freezing can be dried and still 
    obtain a low equilibrium RH.
  • Inhibits natural gas hydrate formation
  • Can be used indoors or outdoors
  • Prevents air or gas line freeze-ups
  • Environmentally safe
  •  3/8" diameter tablet



  • Meeting pipeline moisture specifications
  •  Fuel gas dehydration
  • Instrument gas dehydration
  • Lowering dew point of chilled biogas and landfill gas for siloxane mitigation
  • Remote outdoor locations without electricity
  •  Environments with electrical classification restrictions



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