Pressure Swing Dryers

 Dry Gas Generation using ‘Pressure Swing’ Principle
The PSD-Series is designed specifically for calibration applications. It utilises two desiccant columns of molecular sieve and operates on the pressure-swing principle. The columns are used alternately and a small quantity of dry air is bled from the in-service column to re-generate the line column.

Moisture is absorbed at elevated pressure whilst re-generation occurs at atmospheric pressure, hence the term 'pressure-swing'. The columns are automatically switched on a two minute cycle. The PSD-2 dryer operates continuously and desiccant life is normally in excess of five years. Using oil-free compressed air at 7 barg the PSD-2 delivers up to 10 l/min of air at a dew point of better than -75°C.




Product Features

  • Ultra stable
  • Maintenance free
  • Two ranges: <1 ppm and < 10 ppb
Pressure Swing Dryers

Technical Specification
PSD-2
Type Twin column desiccant, pressure swing
Desiccant 4 Angstrom Molecular sieve bead
Timer Motorised cam
Gauges Bourdon type
Exhausts Sintered bronze silencers
Gas Inlet 10 l/min at 70 to 100 psig; oil free and liquid water free
Gas Outlet 7 l/min (max) at stp less than 1 ppmV (= less than -75°Cdp)
Outlet pressure 10 psig
Power Supply 100/120 or 220/240 V AC, 50/60 Hz
Operating Temperature +5 to +35°C
Storage Temperature -40 to +35°C
Construction Aluminium case, 19” sub-rack 6U x 350mm deep
Weight 12.5kg approx
PSD-4
Type Twin column desiccant, pressure swing
Desiccant 4 Angstrom Molecular sieve bead
Timer Motorised cam
Gas Ports Gas inlet - stainless steel 6mm Swagelok® bulkhead union tube fitting
Gas outlet - stainless steel ¼” Swagelok® bulkhead union VCR fitting
Gas Inlet 20 l/min at 70 to 100 psig; oil free and liquid water free (better or equal to -40°Cdp)
Gas Outlet 10 l/min (max) at stp less than 13 ppbV (-100°Cdp)
Filter Millipore Wafergard IIF Micro Inline, sealed type, retention rating of 0.003 µm, greater than 99.999%
Power 220/240 V AC, 50/60 Hz
Operating Temperature +10 to +40°C
Storage Temperature -40 to +50°C
Construction IP66 (NEMA 4) GRP wall mounting enclosure (700 x 500 x 270mm)
All gas wetted components 316 stainless steel
Weight 27kg approx

Applications
Metrology

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