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DH series-old model
| Model | Flow Rate（Nm³/min） |
| K006* | |
| K009* | 0.53 |
| K017* | 1.00 |
| K030* | 1.80 |
| K058* | 3.60 |
| K145* | 8.70 |
| K220* | 13.20 |
| K330* | 19.80 |
| K430* | 25.80 |
| K620* | 37.00 |
| *Filtration Grade:(µm) | Oil Content (ppm) | |
| PF | 25 | / |
| AO | 1 | 1 |
| AA | 0.01 | 0.01 |
| AX | 0.01 | 0.001 |
| ACS | Actived carbon | / |
| AR | 1 | For dust |
| AAR | 0.01 | For dust |