3M 7711CN pre-filter cotton cannot be used alone, it needs to be protected with 7702 series half mask +7001CN/7008CN filter box +774 filter cotton cover. It can protect users from particulate matter (oil-resistant particulate matter), and can effectively extend the use time of the cartridge.
3M 7711CN pre-filter cotton adopts circular design, special filtering route can ensure the pre-filter effect
It needs to be used with 7001CN/7008CN filter cartridge, and cannot be used alone.
filter cotton assembly instructions:
Put the side of the filter cotton printed with the font facing the filter box into the filter box.
Fasten the filter cover to the filter box and lock it. If assembled correctly, the filter cotton will completely cover the surface of the filter box.
If you change the filter cotton, please pull up the filter box directly to replace it.
When the filter cotton is dirty or damaged, or when you feel the breathing resistance increases significantly when you breathe , Please leave your working environment in time and go to a safe place to replace the filter cotton