TYPE OF AOS
| Type | Pressure drop at nominal flow reate (bar) | General Specifications |
| Single wraped | 0,16 | low production cost, good performance and long life span |
| Douple wrapped | 0,18 | excellent performance on small dimensions or long life span |
| Pleated | 0,15 | low pressure drop |
| Pleated + wrapped | 0,17 | low pressure drop and excellent separation levels |
| With pre-separation fleece | 0,2 | for applications showing high oil percentage before separation or under particular environmental conditons |
| Spin on | 0,25 | for easy maintenance and small flow rates |