A HEPA filter is not enough to filter the gas from residual printing products when working with titanium powder. You need to use a high-efficiency particulate air (HEPA) filter with activated carbon. The activated carbon will help to remove the harmful fumes and gases released during the printing process.

Here are some of the features to look for in a filter for titanium powder SLM printer:

• It should be HEPA certified and have a MERV rating of 13 or higher.
• It should have a high capacity to trap particles and gases.
• It should be easy to clean and replace.
• It should be compatible with the specific SLM printer you are using.

Some of the brands that sell HEPA filters with activated carbon for titanium powder SLM printers include:

• Donaldson
• Camfil
• Filtermist
• Airflow
• 3M

When choosing a filter, it is important to consider the size of your printer and the amount of titanium powder you will be using. You should also make sure that the filter is compatible with the type of gas extraction system you are using.

It is also important to follow the manufacturer's instructions for installation and maintenance of the filter. This will help to ensure that it is effective in trapping the harmful fumes and gases released during the printing process.

Here are some additional safety precautions to take when printing with titanium powder:

• Wear a respirator that is NIOSH-approved for the specific gases and fumes that are released during the printing process.
• Work in a well-ventilated area.
• Avoid skin contact with the titanium powder.
• Dispose of the titanium powder properly.

By following these safety precautions, you can help to protect yourself from the harmful effects of the fumes and gases released during the printing process.@Kirill Olegovich Akimov