1-805-484-2992
Quotes - Engineering - SalesPick the band, then the technology, then the model
A refrigerated dryer is chosen in three steps. The flow band comes from the compressor: multiply rotary screw horsepower by 4.3 to 4.6 or piston horsepower by 3.5 to 4 for delivered SCFM, then correct for inlet and room temperature. The technology comes from the duty cycle: non-cycling for a compressor that stays loaded, cycling for a plant that idles nights and weekends. The model comes from the series tables, where every part number lists its connection, voltage, power and dimensions.
Special conditions jump the queue. Air straight off a piston compressor at 180 to 200°F goes to the high-inlet-temperature dryers; PET blow molding at 500 to 725 psig goes to the high-pressure line; test benches and breathing-air systems to 6,000 psig to the ultra-high-pressure series.
How the sizing works
Four ways in
Non-cycling and cycling by flow band, special duty by condition, and the accessories that go around every dryer
What a refrigerated dryer does
Compressed air leaves the compressor saturated with water vapor at whatever temperature the aftercooler achieves, usually 100 to 120°F. The dryer chills it to about 35°F against a refrigeration circuit, condenses the vapor out, drains the water and reheats the air on its way out so the pipes downstream do not sweat. The result is a pressure dew point near 38°F, ISO 8573-1 class 4, which is dry enough for every indoor plant-air use: no water can condense in a line that never gets below 38°F.
Where it stops
A refrigerated dryer cannot go below freezing, so it is the wrong dryer for outdoor lines in winter, laser assist gas or instrument air with a specified -40°F dew point. Those are desiccant duties; the refrigerated versus desiccant page draws the line and we can source the desiccant unit when a plant needs one.
Current series and their predecessors
The site lists the current series first and keeps the previous generation beside them. A plant replacing a ten-year-old unit can look up the old part number, read its flow and connections, and go straight to the current model that replaces it size for size. The replacement page walks through the nameplate; the series pages carry the cross-reference.
Sized by people, not a form
Every quote is sized by an application person from the compressor data: horsepower and type, aftercooler, room temperature, hours loaded, line pressure and what the air feeds. Send those on the quote page or call 1-805-484-2992, 8am to 5pm, and the model, the filter pair and a price come back the same day.
Non-cycling series
HPR Series: Compact non-cycling dryer for 5 to 50 SCFM shop and point-of-use air; the earlier generation of the small cabinet line, still supported with part numbers and replacements.
5 to 50 SCFM · Non-Cycling · 250 psig max inlet · 120°F max inlet
HPRN Series: Non-cycling refrigerated dryer from 75 to 1,200 SCFM for plant air on a single compressor; previous generation, cross-referenced to current models.
75 to 1,200 SCFM · Non-Cycling · 232 psig max inlet · 120°F max inlet
HPRB Series: Current small non-cycling dryer, 7 to 50 SCFM, with low-GWP R513A refrigerant, a 3-in-1 heat exchanger and a built-in separator on the larger sizes.
7 to 50 SCFM · Non-Cycling · 200 psig max inlet · 120°F max inlet
HPRplus Series: Large non-cycling dryer for 2,500 and 3,000 SCFM central plants with digital controls and a low-pressure-drop exchanger.
2,500 to 3,000 SCFM · Non-Cycling · 232 psig max inlet · 120°F max inlet
DXR Series: Direct-expansion non-cycling dryer in 27 sizes from 10 to 4,200 SCFM; the widest single range on the site, with a full data sheet behind every model.
10 to 4,200 SCFM · Non-Cycling · 203 psig max inlet · 131°F max inlet
From non-cycling to cycling
The non-cycling series above run their refrigeration continuously and hold the evaporator with a hot-gas bypass valve. The cycling series below store cold in a thermal mass, or throttle a digital-scroll or variable-speed compressor, so the refrigeration circuit works only as hard as the air load demands. Same dew point, same flow bands; the difference is the electricity bill at part load and the first cost.
Cycling series
FLEX Series: Cycling dryer from 75 to 2,000 SCFM that trims refrigeration power to the actual load; previous generation, replaced size for size by the FLXA Series.
75 to 2,000 SCFM · Cycling
FLXA Series: Current cycling dryer, 75 to 2,000 SCFM, air- or water-cooled, with low-GWP refrigerants and a heat-transfer cycling control that follows the load.
75 to 2,000 SCFM · Cycling · 120°F max inlet · R513A (75-550 scfm), R454C (800-2000 scfm)
FLX Series: Modular water-cooled cycling dryer skid for 3,000 to 12,000 SCFM, built from paired 1,500 and 2,000 SCFM modules.
3,000 to 12,000 SCFM · Cycling · 225 psig max inlet · 120°F max inlet
HES Series: Energy-saving digital-scroll dryer from 2,500 to 12,500 SCFM for central plants, modular above 3,750 SCFM.
2,500 to 12,500 SCFM · Digital Scroll Cycling · 232 psig max inlet · 130°F max inlet
TMC Series: Thermal-mass cycling dryer from 30 to 635 SCFM; stores cold in a thermal mass so the refrigeration compressor rests when air demand drops.
30 to 635 SCFM · Thermal Mass Cycling · 210 psig max inlet · 140°F max inlet
NXC Series: Cycling dryer in 19 sizes from 20 to 2,000 SCFM with a dry thermal mass and up to 80 percent power savings at part load.
20 to 2,000 SCFM · Cycling · 232 psig max inlet · 158°F max inlet
AES Series: Digital-scroll cycling dryer from 600 to 10,000 SCFM in air- and water-cooled builds, matching refrigeration capacity to demand continuously.
600 to 10,000 SCFM · Digital Scroll Cycling · 232 psig max inlet · 120°F max inlet
VDR Series: Variable-speed dryer from 2,600 to 8,450 SCFM whose inverter-driven compressor tracks plant load; air- and water-cooled versions.
2,600 to 8,450 SCFM · Variable Speed Cycling · 203 psig max inlet · 158°F max inlet
When the standard dryer is the wrong dryer
Three conditions defeat a standard refrigerated dryer: inlet air well above 120°F, line pressure above 250 psig, and the ultra-high pressures of test and breathing-air systems. The special-duty series below are built for exactly those conditions rather than derated versions of a standard unit, and each has its own flow range and part numbers.
Special-duty series
HITN Series: High-inlet-temperature dryer, 20 to 125 SCFM, built for 180°F air straight off a piston compressor; previous generation.
20 to 125 SCFM · High Inlet Temperature · 227 psig max inlet · 180°F max inlet
HRHT Series: Current high-inlet-temperature dryer, 25 to 100 SCFM, rated for 200°F inlet air from reciprocating compressors with no aftercooler.
25 to 100 SCFM · High Inlet Temperature · 200°F max inlet · R513A
HPET Series: High-pressure dryer for PET blow molding and 725 psig lines, 30 to 3,000 SCFM; previous generation, cross-referenced to the HHPR Series.
30 to 3,000 SCFM · High Pressure · 725 psig max inlet · HFC (type not stated on the datasheet)
HHPR Series: Current high-pressure dryer rated 680 psig for PET blow molding and high-pressure process air, 115 to 2,400 SCFM.
115 to 2,410 SCFM · High Pressure · 680 psig max inlet · 120°F max inlet
HTR Series: High-temperature direct-expansion dryer, 25 to 125 SCFM, for 180°F inlet air from piston compressors on shop and service-bay duty.
25 to 125 SCFM · High Inlet Temperature · 232 psig max inlet · 180°F max inlet
APET Series: High-pressure dryer built for 500 and 725 psig PET and process lines, 45 to 1,000 SCFM.
45 to 1,000 SCFM · High Pressure · 725 psig max inlet · 120°F max inlet
AXHP Series: Ultra-high-pressure dryer in four pressure ratings to 6,000 psig, 20 to 275 SCFM, for high-pressure test, breathing-air and process systems.
20 to 275 SCFM · Ultra-High Pressure · 6,000 psig max inlet · 120°F max inlet
Dryers by the work they do
The series pages describe the equipment; the application pages describe the plant. Paint booths, food packaging, CNC machining and PET blow molding each set their own dew point, filtration and flow, and each application page points at the series that suit it.
