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HBP Series Blower Purge Desiccant Dryers
| PRODUCT | TYPE | FLOW | RATING |
|---|---|---|---|
| Desiccant Air Dryer | Blower Purge | 500 to 4,300 SCFM | 150 psig / -40°F |
Specifications
Configuration & Size
Sizes:
13 models, 500 to 4,300 SCFM
Connections:
2 in NPT to 6 in flange
Heater:
10 to 70 kW
Blower:
1.6 to 10.3 kW
Features
- An axial blower pushes heated ambient air through the off-line tower, so no dried compressed air regenerates the bed at design conditions
- Fixed-time tower switching as standard, demand switching optional
- NEMA 4 controller with tower status and service reminders
- Soft-seated check valves between the towers
Regeneration from room air
Kilowatts instead of compressor horsepower
A heatless dryer regenerates by throwing away dried compressed air. The HBP Series regenerates with air it never compressed: a dedicated blower draws in ambient air, an external heater lifts its temperature, and the hot stream drives the water out of the off-line alumina bed. At design conditions no compressed air is purged at all, so every SCFM the compressors make goes to the plant.
The cost moves to the electrical side. Heaters run from 10 kW on the HBP500 to 70 kW on the HBP4300, and the published full-load average sits close to the heater rating: 25 kW on the HBP1300, 41 kW on the HBP2200. Set that against the compressor power a heatless unit would spend on purge at the same flow, around 15 percent of rated capacity, and blower purge usually comes out ahead on a large system that runs around the clock.
Tower switching is on a fixed time base as standard, with demand switching as an option that keeps each tower on line until it is loaded. The NEMA 4 controller shows tower status and reminds the operator when service is due, and soft-seated check valves keep the regenerating tower sealed from the one on line.
HBP Series Applications
Large frames, flanged from 750 SCFM
The HBP500 and HBP600 use 2 in NPT and stand 105 and 108 in tall. From 750 to 1,800 SCFM the ports are 3 in flanges, 2,200 and 2,600 SCFM use 4 in, and 3,200 to 4,300 SCFM use 6 in. Weights run from 1,866 lb at 500 SCFM to 12,350 lb at 4,300 SCFM, where the dryer is 130 in deep. Each size lists a coalescing prefilter and an afterfilter, and vessel insulation and mounted filters are available.
Give the blower inlet clean room air: a blower that pulls from beside a cooling tower or a wash-down area hands the heater a wetter load than it was sized for. Keep the dryer room between 40 and 120°F, run the heater feed at its full rating, and plan the lift, since nothing in this series is a pallet-jack move. Pipe a bypass with isolation valves around the dryer and its filters so the plant can run on refrigerated air during a desiccant change.
Common FAQs
Only at the changeover, never as a continuous purge at design conditions. The tower coming off line is vented to start its regeneration, and the regenerated tower is filled back to line pressure with dried air before it takes over, so one tower volume is spent per cycle. On a plant running well under its rating, the demand switching option stretches the time between changeovers and cuts even that loss.
Yes where the equipment room runs cool or people work close to the dryer; in a warm room on a steady load it matters less. During heating, bare tower walls give heat to the room that the heater then has to replace, so the heating step runs longer and the average draw creeps up, most of all near the 40°F end of the ambient rating. Insulation also keeps hot steel away from hands during regeneration. It does not change the heater rating, so the feeder is sized the same either way. Order it with the dryer, because insulating hot, piped towers later means a shutdown.
| Part Number | SCFM | Connection | H x W x D (in) | Weight (lb) |
|---|---|---|---|---|
| HBP500 | 500 | 2 in NPT | 105 x 53 x 70 | 1,866 |
| HBP600 | 600 | 2 in NPT | 108 x 55 x 71 | 2,111 |
| HBP750 | 750 | 3 in flange | 114 x 60 x 83 | 2,456 |
| HBP900 | 900 | 3 in flange | 114 x 60 x 83 | 2,472 |
| HBP1050 | 1,050 | 3 in flange | 113 x 64 x 84 | 2,981 |
| HBP1300 | 1,300 | 3 in flange | 118 x 66 x 85 | 3,576 |
| HBP1500 | 1,500 | 3 in flange | 116 x 80 x 93 | 5,359 |
| HBP1800 | 1,800 | 3 in flange | 116 x 80 x 93 | 5,359 |
| HBP2200 | 2,200 | 4 in flange | 124 x 85 x 104 | 8,018 |
| HBP2600 | 2,600 | 4 in flange | 124 x 85 x 104 | 8,123 |
| HBP3200 | 3,200 | 6 in flange | 121 x 97 x 117 | 9,333 |
| HBP3600 | 3,600 | 6 in flange | 128 x 97 x 117 | 9,833 |
| HBP4300 | 4,300 | 6 in flange | 124 x 105 x 130 | 12,350 |
