DXR Series Non-Cycling Refrigerated Air Dryers

One exchanger block does three jobs

Precooler, chiller and separator in a single core

The DXR Series is the widest single non-cycling range we sell: 27 direct-expansion dryers from 10 to 4,200 SCFM that share one design idea, an all-in-one exchanger that puts the air-to-air precooler, the air-to-refrigerant chiller and the water separator in a single block. A hot-gas bypass valve keeps the evaporator just above freezing whatever the load, so the 38°F dew point holds at 20 percent flow as well as at 100. A zero-loss drain and a digital dew point display are standard on every size. It is the lowest-first-cost choice for a plant that runs at a steady load, and the fine model steps mean the fit is exact rather than approximate.

Non-cycling control that holds the dew point. The refrigeration compressor runs continuously; a hot-gas bypass valve feeds discharge gas into the evaporator as load falls so it never ices; Dew point holds steady from full flow down to no flow, which is what an instrument line or a paint booth needs; Digital pressure dew point display on the panel shows at a glance whether the dryer is doing its job; Two refrigerants across the range: low-GWP R513A on the 10 to 65 SCFM units, R410A from 85 SCFM up.

Sized for the compressor, not the pipe. The steps run 10, 15, 20, 30, 50, 65, 85, 105, 125, 150, 185, 230, 250 SCFM and on up, so the next size above a corrected duty is rarely more than 20 percent larger; A 25 hp rotary screw at 110 SCFM lands on the DXR 0125 with margin; a 100 hp screw at 450 SCFM lands on the DXR 0500; Single-phase 115 V through 150 SCFM means the small units plug in beside the compressor.