1-805-484-2992
Quotes - Engineering - Sales
HHE Series Heatless Desiccant Dryers
| PRODUCT | TYPE | FLOW | RATING |
|---|---|---|---|
| Desiccant Air Dryer | Timed Heatless | 40 to 5,400 SCFM | 150 psig / -40°F |
Specifications
Configuration & Size
Sizes:
40 to 5,400 SCFM, the 18 HHX frames
Connections:
1 in NPT through 6 in ANSI flange
Power:
100-120 V/1/50-60
Controls:
Fixed 10-minute timer, LED panel
Features
- One job done simply: class 2, -40°F, on a 10-minute switching cycle
- LED panel shows tower status at a glance, with no setup menus to get wrong
- Activated alumina beds dried up-flow through stainless diffusers
- Shares vessels, ports and footprints with the demand-controlled HHX
A timer, two towers and nothing to tune
Where a steady load makes demand control unnecessary
The HHE Series is the plain version of the heatless twin tower. A timer switches the towers on a fixed 10-minute cycle, one tower drying while the other is depressurized, swept with a portion of the dry air and brought back up to pressure before it takes over. There is no bed sensing and no dew point mode to pick; the dryer delivers class 2, -40°F, and that is all it is built to do.
That simplicity pays on a load that does not move much: a three-shift process line, a compressor that runs loaded around the clock, an outdoor header that must not freeze at any point in winter. When the air demand sits near the dryer's rating, a demand control has little purge to save, and the HHE costs less to buy and has less to go wrong. The panel is LED indicators rather than a touchscreen, and the controls take 100 to 120 V single phase.
Mechanically it is the same machine as the HHX: the same 18 frames, the same up-flow alumina beds with a 4.8 second contact time, the same weights from 365 to 12,000 lb and the same 150 psig vessel with a 250 psig option. The two are interchangeable on a drawing, which helps a plant that wants one footprint across several compressor rooms.
HHE Series Applications
Same footprint as the demand model
A 40 SCFM HHE is a 46 in tall cabinet on a 32 x 32 in base at 365 lb with 1 in NPT ports. The 260 SCFM frame is 72 in tall on 2 in NPT at 1,010 lb, and the 1,130 SCFM frame is 113 in tall at 2,875 lb on a 3 in ANSI flange. Every size matches its HHX counterpart, so a pad drawn for one fits the other.
Set it level, with a coalescing prefilter rated to 0.01 micron and a drain that works, because liquid carried into the inlet soaks the bottom of the bed long before the timer can recover it. Put the 1 micron dust filter on the outlet ahead of the first branch, valve both filters for service, and fit a bypass so the dryer can be isolated without stopping the plant. Take the purge exhaust outside or into a muffler where the blowdown noise is acceptable.
Common FAQs
Because its fixed 10-minute timer is set for that one class. A heatless dryer reaches class 1 by switching sooner, so the bed never loads deeply, and saves purge at class 3 by switching later; both need a controller that can change the cycle, which is what the HHX adds. Most instrument air and outdoor headers are written at class 2, so the HHE covers the common case at a lower price. If a later project calls for minus 100°F, the HHX fits the same pad and piping.
Yes, with a small control transformer or a single-phase circuit brought to it, because the HHE controls take 100 to 120 V single phase and nothing else. There is no heater or blower, so the load is only the timer, the LED panel and the valve solenoids, and the transformer is a minor item. Put it on the quote and the electrical drawing rather than leaving it for start-up day, when a dryer with no suitable supply nearby is a common reason commissioning slips. Where a 100 to 120 V feed is awkward, the HHX takes 100 to 240 V single phase or 12 to 24 VDC on the same frame and piping.
| Part Number | SCFM | Connection | H x W x D (in) | Weight (lb) |
|---|---|---|---|---|
| HHE-40 | 40 | 1 in NPT | 46 x 32 x 32 | 365 |
| HHE-60 | 60 | 1 in NPT | 61 x 32 x 32 | 445 |
| HHE-90 | 90 | 1 in NPT | 78 x 32 x 32 | 575 |
| HHE-115 | 115 | 1 in NPT | 54 x 44 x 38 | 685 |
| HHE-165 | 165 | 1 in NPT | 54 x 44 x 38 | 685 |
| HHE-260 | 260 | 2 in NPT | 72 x 49 x 38 | 1,010 |
| HHE-370 | 370 | 2 in NPT | 63 x 55 x 38 | 1,215 |
| HHE-450 | 450 | 2 in NPT | 71 x 55 x 38 | 1,350 |
| HHE-590 | 590 | 2 in NPT | 101 x 50 x 53 | 1,473 |
| HHE-750 | 750 | 3 in ANSI flange | 109 x 51 x 48 | 2,134 |
| HHE-930 | 930 | 3 in ANSI flange | 113 x 56 x 56 | 2,414 |
| HHE-1130 | 1,130 | 3 in ANSI flange | 113 x 59 x 56 | 2,875 |
| HHE-1350 | 1,350 | 3 in ANSI flange | 118 x 60 x 56 | 3,722 |
| HHE-1550 | 1,550 | 3 in ANSI flange | 113 x 66 x 56 | 4,167 |
| HHE-2100 | 2,100 | 4 in ANSI flange | 116 x 73 x 56 | 4,417 |
| HHE-3000 | 3,000 | 4 in ANSI flange | 122 x 78 x 65 | 9,010 |
| HHE-4100 | 4,100 | 6 in ANSI flange | 124 x 93 x 88 | 9,900 |
| HHE-5400 | 5,400 | 6 in ANSI flange | 126 x 102 x 92 | 12,000 |
