# Air quality

Poor air quality may cause damage to the tool and reduce the performance.

- For optimum performance and maximum product life we recommend the use of compressed air with a maximum dew point of -5°C (23°F). We also recommend to install an Atlas Copco refrigeration type air dryer.

- Use a separate air filter which removes solid particles larger than 30 microns and more than 90% of liquid water. Install the filter as close as possible to the tool and prior to any other air preparation units to avoid pressure drop.

- Lubrication free tools are a better choice from an environmental perspective.

We recommend to use the tool with oil-free air. In case you need to use lubricated air, we strongly recommend that you install an Atlas Copco oil-fog lubricator (DIM). This should be set with maximum of 20 drops per min (1 drop = 15 mm3). A single point lubricator type Atlas Copco Dosol can also be used for tools with short running cycles. Information about Dosol settings may be found under Air Line Accessories in our main catalogue.

For maximum product life, once the tool has been operated with air containing oil, it is not recommended to switch to oil-free air again.