Ultimate Dew Point Performance


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 & Benefits

  • 7 lbs H20 . MMSCF gas is attainable @ 50 PSIG & 60°F
  • 20 lbs H20 / MMSCF gas is attainable @ 25 PSIG & 80°F
  • Used when gas line temperatures are below freezing
  • Up to a 4% equilibrium RH


  • Meets pipeline gas moisture specifications
  • Fuel gas & biogas dehydration
  • Lowers moisture content of biogas
  • Instrument gas dehydration
  • Remote outdoor locations without electricity

Interested in Learning more about Van Air Systems 4UF? Watch an Instructional Video which will tell you more about it

Need a Product?