M NX Series Heatless Modular Adsorption Dryers
−20 °C dew point with nothing to go wrong
Modular twin-chamber heatless dryers from 1.5 to 65 Nm³/min. No heater, no blower, no cooling water — a pressure-swing cycle, two solenoid valves and a controller in a cabinet that bolts to the floor. Extruded chamber modules sit below the pressure vessel threshold and lift out for desiccant change. A twin-tower HH build reaches −70 °C.
Models: M10NX to M600NX · 15 models + HH tower · Compressed air dryers
- −20 °C Standard dew point
- −70 °C On the HH tower build
- 0.12 kW Electrical load
- 1.5–65 Nm³/min
Key specifications
| Pressure dew point | ≤ −20 °C, guaranteed |
|---|---|
| Purge air, published | 7 % standard, 5 % minimum |
| Cycle time | Adjustable — see technical annex |
| Working pressure | 6 – 10 bar g (7 bar g rating) |
| Maximum inlet air temperature | 35 °C (hard limit) |
| Ambient temperature | 2 – 45 °C |
| Pressure drop at full load | 0.21 bar |
| Power supply | 220 V 1-ph 50 Hz, 0.12 kW |
| Inlet oil content | Oil-free or ≤ 0.1 ppm |
| Noise | Below 70 dB at 1 m |
Why this range
- Extruded chamber modules on a shared manifold, below the pressure vessel inspection threshold
- Desiccant changed by swapping modules, not by dumping a vessel
- Two-layer bed: activated alumina for bulk water, molecular sieve for dew point
- Below 70 dB at 1 m — can stand on the workshop floor
- Lowest capital cost and electrical load of any dryer that reaches −20 °C
Models and technical data
M NX Series — heatless modular
| Model | Nm³/min | scfm | Air connection | kW | L × W × H mm | kg |
|---|---|---|---|---|---|---|
| M10NX | 1.5 | 58 | Rc1" | 0.12 | 260 × 460 × 760 | 45 |
| M20NX | 2.5 | 96 | Rc1" | 0.12 | 260 × 460 × 1254 | 68 |
| M30NX | 3.8 | 146 | Rc1" | 0.12 | 260 × 460 × 1554 | 85 |
| M50NX | 6.5 | 250 | Rc1-1/2" | 0.12 | 778 × 400 × 1735 | 188 |
| M75NX | 10.5 | 403 | Rc2" | 0.12 | 952 × 400 × 1735 | 282 |
| M100NX | 13.5 | 518 | Rc2.5" | 0.12 | 1126 × 400 × 1735 | 375 |
| M120NX | 17 | 653 | Rc2-1/2" | 0.12 | 1300 × 400 × 1735 | 470 |
| M150NX | 21.5 | 826 | Rc2-1/2" | 0.12 | 1474 × 400 × 1735 | 565 |
| M180NX | 25 | 960 | Rc2-1/2" | 0.12 | 1648 × 400 × 1735 | 660 |
| M200NX | 28.5 | 1095 | DN80 flg | 0.12 | 1126 × 762 × 1735 | 775 |
| M300NX | 37 | 1421 | DN100 flg | 0.12 | 1300 × 762 × 1735 | 940 |
| M350NX | 41.5 | 1594 | DN100 flg | 0.12 | 1474 × 762 × 1735 | 1130 |
| M450NX | 50 | 1920 | DN100 flg | 0.12 | 1648 × 752 × 1760 | 1320 |
| M500NX | 55 | 2112 | DN100 flg | 0.12 | 1884 × 762 × 1760 | 1510 |
| M600NX | 65 | 2496 | DN125 flg | 0.12 | 1130 × 1474 × 1735 | 1720 |
At 7 bar g, 35 °C inlet air, ≤ −20 °C pressure dew point.
HH tower build — down to −70 °C
| Model | Nm³/min | scfm | Air connection | kW | Supply | L × W × H mm |
|---|---|---|---|---|---|---|
| HH10NX | 1.5 | 58 | G1" | 0.10 | 220 V 1-ph 50 Hz | 725 × 630 × 1795 |
| HH20NX | 2.5 | 96 | G1" | 0.10 | 220 V 1-ph 50 Hz | 840 × 570 × 1695 |
| HH30NX | 3.8 | 146 | G1½" | 0.10 | 220 V 1-ph 50 Hz | 1020 × 610 × 1690 |
| HH50NX | 6.5 | 250 | G1½" | 0.10 | 220 V 1-ph 50 Hz | 1160 × 680 × 1860 |
| HH75NX | 10.5 | 403 | G2" | 0.10 | 220 V 1-ph 50 Hz | 1200 × 720 × 2180 |
| HH100NX | 13.5 | 518 | G2" | 0.10 | 220 V 1-ph 50 Hz | 1260 × 780 × 2230 |
| HH120NX | 17 | 653 | DN65 | 0.10 | 220 V 1-ph 50 Hz | 1350 × 930 × 2440 |
| HH150NX | 21.5 | 826 | DN80 | 0.10 | 220 V 1-ph 50 Hz | 1470 × 1000 × 2270 |
| HH180NX | 25 | 960 | DN80 | 0.10 | 220 V 1-ph 50 Hz | 1460 × 1000 × 2470 |
| HH200NX | 28.5 | 1095 | DN80 | 0.10 | 220 V 1-ph 50 Hz | 1560 × 1070 × 2450 |
| HH250NX | 32 | 1229 | DN80 | 0.10 | 220 V 1-ph 50 Hz | 1600 × 1050 × 2650 |
| HH300NX | 37 | 1421 | DN100 | 0.10 | 220 V 1-ph 50 Hz | 1700 × 1100 × 2680 |
Twin-tower heatless build for duties below −20 °C.
Sizing worked through
| Step | What to do | Example |
|---|---|---|
| 1 Plant demand | Take the actual air demand downstream of the dryer | 30 Nm³/min |
| 2 Add the purge | Divide by (1 − purge). At 7 % that is ÷ 0.93 | 30 ÷ 0.93 = 32.3 Nm³/min |
| 3 Check the pressure | Below 7 bar g, go up a frame size | 7 bar g — no change |
| 4 Check inlet temperature | Above 35 °C the range cannot be used | 33 °C — acceptable |
| 5 Select | First frame at or above the corrected flow | M300NX, 37 Nm³/min |
| 6 Size the compressor | The compressor must make the purge air too | 32.3 Nm³/min minimum |
Where it is used
- Instrument and control air
- Laboratory and analyser air
- Pneumatic conveying of powders
- Outdoor and cold-climate pipe runs
- Feed air to nitrogen generators
- Small plants with no cooling water