Pressure Swing dryers provide a source of very dry compressed
air for use as a zero gas in humidity calibration systems, or for general laboratory applications.
The Michell PSD Series Pressure Swing Dryers use two columns
filled with 4Å molecular sieve desiccant,
which are used alternately on a two-minute switching cycle. The
PSD dryers are designed to operate continuously,
using a small proportion of the dried air, to regenerate the
offline column - generally giving desiccant life in excess of
five years. This type of heatless regeneration also uses
significantly less energy than a 'heated' type of dryer.
Product Features
- Excellent long term stability
- Maintenance free except for a desiccant change once every 5 years
- Completely self-contained
- Low power consumption
| Model | PSD2 | PSD4
(Standard) | PSD4-HFV
(High flow volume) | PSD4-HPO
(High pressure output) |
| Performance |
| Gas output |
| Flow | 7 Nl/min (14.8 scfh) | 30 Nl/min (63.6 scfh) | 90 Nl/min (109.7 scfh) | 30 Nl/min (63.6 scfh) |
| Pressure | 0.5 barg (7 psig) | User-settable up 8 barg
(116 psig) |
| Moisture content | <1ppmv | <13.8ppbv |
| Input Requirements |
| Gas supply |
| Flow | 10 Nl/min (21.2 scfh) | 30 Nl/min (63.6 scfh) | 90 Nl/min (109.7 scfh) | 30 Nl/min (63.6 scfh) |
| Pressure | 5 to 7 barg (70 to 100 psig) | 6 to 10 barg (87 to 145 psig) |
| Moisture content | Oil and liquid water-free | <16ppmv |
| Electrical Input |
| Power | 100 to 115 OR 220 to 240 VAC, 50/60Hz | 100 to 240VAC 50/60Hz |
| Power connection | IEC socket |
| Environmental Conditions |
| Operating temperature | +5 to +35°C (+41 to +95°F) | +10 to +40°C (+50 to +104°F) |
| Storage temperature | -40 to +35°C (-40 to +95°F) | -40 to +50°C (-40 to +122°F) |
| Mechanical Specifications |
| Type | Twin column desiccant, pressure swing |
| Desiccant | 4 Ångström Molecular sieve bead (4-8 mesh) |
| Timer | Mechanical cam | Programmable relay |
| Gas connections |
| Inlet | Swagelog ® ¼" | ¼" VCR Swagelok® |
| Outlet | Swagelog ® ¼" | ¼" VCR Swagelok® | ½" VCR Swagelok® | ¼" VCR Swagelok® |
| Fliters |
| Outlet | None |
Millipore Wafergard IIF Micro Inline (sealed type) with PTFE membrane
element rated at >99.999% retention of 0.003μm particles |
| Vent | None | Bonded glass microfiber rated at >99.999% retention of 0.1μm particles |
| Construction | Rack mount: 19" x 6U x 324mm (12.8") | 304 stainless steel wall mounting enclosure: 800x600x300mm (31.5x24x12”) |
| Weight | 12.5kg (27.5lbs) | 30Kg (66lb) | 35Kg (77lb) | 32Kg (70lb) |
Applications |
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