The Walker Filtration PROSFD PD004 is a compact, high-performance heatless desiccant air dryer engineered for smaller point-of-use applications. With a flow capacity of 4 scfm (7 Nm³/hr), the PD004 delivers consistent -40°F (-40°C) pressure dewpoint as standard, with an option for -94°F (-70°C) for critical applications.
Built to ISO 8573-1:2010 standards, the PD004 comes supplied as standard with an XA grade 0.01 micron pre-filter and an integrated X1 grade 1 micron dust filter for superior air quality. Its LED controller with built-in energy management reduces purge flow during low demand, minimizing operating costs.
The PROSFD PD004 features easy cartridge serviceability, quiet operation (<85 dBA), and universal power supply (100–240 VAC / 12–24 VDC) for global installation. Ideal for instrumentation, medical, dental, electronics, food & beverage, and laboratory environments, the PD004 ensures reliable, clean, and dry compressed air where it matters most.
✅ Key Features:
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4 scfm (7 Nm³/hr) flow capacity
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ISO 8573-1 Class 2 (-40°C) / Class 1 (-70°C) air quality
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LED controller with energy-saving management
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XA grade 0.01 micron pre-filter (supplied)
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Integrated 1 micron dust filter in cartridge
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Quiet operation <85 dBA
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Easy cartridge replacement for low service downtime
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Universal multi-voltage power supply
