DHDM Series – Heatless Modular Desiccant Air Dryers
DRYERS - COMPRESSED AIR / DESICCANT COMPRESSED AIR DRYERS
DHDM Series Modular Desiccant Air Dryers are ideal for point of use, laboratories and confined areas. They provide a continuous supply of dry compressed air by automatically cycling the flow of air through two desiccant beds.
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The Deltech DHDM Series Modular Desiccant Air Dryers protect moisture sensitive applications requiring low pressure dew points. Delivers dew points of ISO 8573-1: 2010 Class 1 (-94°F, -70°C) and Class 2 (-40°F, -40°C) with flow rates of 3 to 177 scfm (5m3/h to 300m3/h). Critical applications include labs, hospitals, pharmaceutical manufacturing and other high-tech installations.
The DHDM Series incorporate a time proven design, with superior features and reliability, in a compact and easy to install package. Standard features include:
- Coalescing pre and particulate after filters (shipped loose)
- Electronic Controls
- Sequence indication
- Durable extruded aluminum construction
- Heavy duty purge exhaust muffler
Compressed air enters the dryer and is directed to Tower 1 by valve (A), and then to the dryer outlet through shuttle valve (B). A portion of the dried air is throttled to near atmospheric pressure by means of orifice (C). This extremely dry, low-pressure air flows through and regenerates the desiccant in Tower 2 and is exhausted through purge/repressurization valve (D) and exhaust muffler (E) to atmosphere. After a set time, the automatic solid state timer closes purge/repressurization valve (D) allowing Tower 2 to repressurize slowly. At the end of 2 minutes, valve (A) shifts and purge/ repressurization valve (D) reopens. The main air flow is now dried by Tower 2 while Tower 1 is being regenerated.
| Model | DIMENSIONS | IN/OUT CONNECTIONS | WEIGHT | |||
|---|---|---|---|---|---|---|
| H (IN) | W (IN) | D (IN) | NPT | LBS | KG | |
| DHDM 3 | 16.7 (424.2 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 21.8 | 9.9 |
| DHDM 9 | 32.4 (822.9 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 35 | 15.9 |
| DHDM 15 | 42.2 (1071.9 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 46 | 20.9 |
| DHDM 24 | 38.1 (967.7 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1/2" | 101.5 | 46.1 |
| DHDM 32 | 44 (1117.6 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 3/4" | 121.2 | 54.9 |
| DHDM 41 | 51.9 (1318.3 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 3/4" | 136.7 | 62 |
| DHDM 59 | 65.9 (1673.9 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1" | 180.8 | 82 |
| DHDM 88 | 73.7 (1871.9 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1" | 186.5 | 84.6 |
| DHDM 118 | 67.1 (1704.3 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 352.7 | 160 |
| DHDM 147 | 75 (1905 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 396.8 | 180 |
| DHDM 177 | 75 (1905 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 396.8 | 180 |
Features
The Deltech DHDM Series Modular Desiccant Air Dryers protect moisture sensitive applications requiring low pressure dew points. Delivers dew points of ISO 8573-1: 2010 Class 1 (-94°F, -70°C) and Class 2 (-40°F, -40°C) with flow rates of 3 to 177 scfm (5m3/h to 300m3/h). Critical applications include labs, hospitals, pharmaceutical manufacturing and other high-tech installations.
The DHDM Series incorporate a time proven design, with superior features and reliability, in a compact and easy to install package. Standard features include:
- Coalescing pre and particulate after filters (shipped loose)
- Electronic Controls
- Sequence indication
- Durable extruded aluminum construction
- Heavy duty purge exhaust muffler
Theory of Operation
Compressed air enters the dryer and is directed to Tower 1 by valve (A), and then to the dryer outlet through shuttle valve (B). A portion of the dried air is throttled to near atmospheric pressure by means of orifice (C). This extremely dry, low-pressure air flows through and regenerates the desiccant in Tower 2 and is exhausted through purge/repressurization valve (D) and exhaust muffler (E) to atmosphere. After a set time, the automatic solid state timer closes purge/repressurization valve (D) allowing Tower 2 to repressurize slowly. At the end of 2 minutes, valve (A) shifts and purge/ repressurization valve (D) reopens. The main air flow is now dried by Tower 2 while Tower 1 is being regenerated.
Specifications
| Model | DIMENSIONS | IN/OUT CONNECTIONS | WEIGHT | |||
|---|---|---|---|---|---|---|
| H (IN) | W (IN) | D (IN) | NPT | LBS | KG | |
| DHDM 3 | 16.7 (424.2 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 21.8 | 9.9 |
| DHDM 9 | 32.4 (822.9 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 35 | 15.9 |
| DHDM 15 | 42.2 (1071.9 MM) | 9.4 (238.8 MM) | 8.3 (210.8 MM) | 3/8" | 46 | 20.9 |
| DHDM 24 | 38.1 (967.7 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1/2" | 101.5 | 46.1 |
| DHDM 32 | 44 (1117.6 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 3/4" | 121.2 | 54.9 |
| DHDM 41 | 51.9 (1318.3 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 3/4" | 136.7 | 62 |
| DHDM 59 | 65.9 (1673.9 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1" | 180.8 | 82 |
| DHDM 88 | 73.7 (1871.9 MM) | 18.7 (474.9 MM) | 14.3 (363.2 MM) | 1" | 186.5 | 84.6 |
| DHDM 118 | 67.1 (1704.3 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 352.7 | 160 |
| DHDM 147 | 75 (1905 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 396.8 | 180 |
| DHDM 177 | 75 (1905 MM) | 21.1 (535.9 MM) | 19.5 (495.3 MM) | 1-1/2" | 396.8 | 180 |