BRAKESELIMFILTERSDRYCORE™ · ED4AIR DRYERAIR RESERVOIR
Moisture taken up by the desiccant bed, and water expelled by the purge valveCompressor with intake, DRYCORE cartridge (in section) with purge valve, air reservoir, brake valvesConceptual illustration of a pneumatic brake circuit with a DRYCORE™ air-dryer cartridge. Compressed air from the compressor passes through the cartridge, shown in section, where the desiccant bed takes up its moisture before the air reaches the reservoir and the brake valves. On the purge cycle the purge valve opens and expels the collected water, and the bed is regenerated. Recurring water downstream of the dryer is a system symptom that calls for inspecting the compressor, governor, purge cycle and reservoirs. At service the cartridge is replaced. Illustrative simulation of how it works: a conceptual animation, not an engineering model or test result, and it shows no product data.

How to read this figure

  1. Compressor and intake. The compressor draws ambient air through its intake and delivers it under pressure toward the dryer. Moving the cursor sideways changes how much moisture the air carries.
  2. DRYCORE™ cartridge in section. The compressed air flows through the desiccant bed inside the cartridge, which takes up the water vapour.
  3. Moisture in the bed. The blue marks show the moisture held by the front of the bed. The readout goes from dry to taking up moisture and to near saturation as the bed loads.
  4. Purge valve. On the purge cycle, the purge valve under the cartridge opens and the collected water drops out; part of the bed's capacity is recovered. The readout shows when the valve is open.
  5. Air reservoir. The dry air is stored in the reservoir, ready for the brake system.
  6. Brake valves. From the reservoir, the air supplies the brake-valve block, the components the dryer exists to protect.
  7. Service. Moving the cursor to the top, or pressing E, runs the service: the cartridge comes off and a new one goes on with a dry desiccant bed.