Description
HBP-2500-4-E6L Altec AIR Heat Regenerative Desiccant Air Dryer
The Altec AIR HBP-2500-4-E6L is a dual tower heat regenerative desiccant air dryer with an external blower purge system designed to deliver consistently dry compressed air for moisture-sensitive industrial applications. It removes water vapor through adsorption and is engineered to provide a standard -40°F pressure dew point (ISO 8573.1 Class 2) under typical rating conditions.
This model is rated for 2500 SCFM at 100 PSIG (CAGI ADF 200 conditions) and uses a packaged blower assembly to direct heated atmospheric air counter-current through the off-line tower for regeneration. An auxiliary cooling/stripping feature uses approximately 1.7% dry process air to help mitigate dew point spikes ("heat bumps") during tower transitions.
Key Features
- External blower purge regeneration: Heated atmospheric air regenerates the off-line tower without relying solely on compressed air purge.
- -40°F standard outlet dew point: Designed for ISO 8573.1 Class 2 dryness under rated conditions.
- Feature-rich Pro-Logic controller: ETL listed controller with a NEMA 4X enclosure for industrial environments.
- Factory-installed filtration: Filters with differential pressure gauges plus a pre-filter timer drain.
- Regulated purge flow: Optimizes settings across typical operating pressure changes.
- ASME / CRN pressure vessels: Industrial-duty construction with safety relief valves.
Options Included (per part number)
- EcoTronic dew point demand control (E): Reduces energy use by adjusting regeneration to actual moisture load.
- 6-way bypass + dual selectable pre-filter (6): Enhanced bypass manifold with selectable pre-filtration for maintenance flexibility.
- Outdoor low-ambient kit (L): Environment temperature protection for outdoor installations down to -20°F.
Specifications
| Model | HBP-2500-4-E6L |
|---|---|
| Dryer Type | Dual Tower Heat Regenerative Desiccant Dryer (External Blower Purge) |
| Rated Inlet Flow | 2500 SCFM @ 100 PSIG |
| Standard Outlet Dew Point | -40°F (Pressure Dew Point) |
| Max Working Pressure | 150 PSIG (Standard) |
| Max Inlet Temperature | 120°F (49°C) |
| Inlet/Outlet Connection | 4" (FLG) |
| Power Requirement | 460 VAC, 3 Ph, 60 Hz |
| Heater Power | 50.0 kW |
| Dimensions (in) | 96 x 84 x 126 |
| Weight | 8,030 lb |
Benefits
- Protects equipment and processes: Helps reduce corrosion, freezing, and contamination caused by moisture.
- Stable dew point performance: Auxiliary cooling/stripping helps reduce transition spikes for more consistent dry air delivery.
- Energy-aware operation: External blower purge and regulated purge flow support efficient regeneration cycles.
- Service-friendly package: Factory filtration and optional bypass manifolds help simplify maintenance and reduce downtime.
Installation & Application Notes
- Size the dryer to your actual demand and operating conditions; rated flows are based on 100 PSIG inlet pressure and 100°F inlet temperature.
- Install downstream of appropriate cooling and moisture separation to minimize liquid carryover to the desiccant beds.
- Maintain filtration and drains to protect desiccant life and support consistent dew point performance.
- Allow clearance for service access, desiccant maintenance, and filter replacement.
The HBP-2500-4-E6L is a strong fit for industrial compressed air systems that require dependable -40°F dew point performance, external blower purge regeneration, and a packaged dual tower heat regenerative design at 2500 SCFM.
Frequently Asked Questions
HBP-2500-4-E6L Heat Regenerative Desiccant Dryer
▶️ Question: What does “external blower purge” mean on HBP dryers?
Answer: HBP dryers use a packaged blower to move heated atmospheric air through the off-line tower during regeneration, reducing reliance on compressed air purge compared with fully heatless designs.
▶️ Question: What does a -40°F pressure dew point do for my system?
Answer: A -40°F PDP indicates very dry air, helping prevent condensation in piping and protecting tools, controls, and processes that are sensitive to moisture.
▶️ Question: How is the rated 2500 SCFM capacity determined?
Answer: Rated inlet flow is based on CAGI ADF 200 conditions (typically 100 PSIG inlet pressure, 100°F inlet temperature, and -40°F PDP). If your pressure or temperature differs, capacity should be corrected accordingly when sizing.
▶️ Question: What does EcoTronic (E) do if it’s included in my part number?
Answer: EcoTronic dew point demand control adjusts regeneration based on moisture load to help reduce energy use during periods of lower demand.
▶️ Question: What’s the purpose of the bypass and dual filter packages (3/6/9)?
Answer: Bypass manifolds and selectable filtration help keep air flowing during service, simplify filter maintenance, and can support higher uptime in continuous-duty applications.
