Ensuring the safety of workers against particulates is dependent on the proper filter selection. This new regulation was published to include new technologies in the manufacture of particulate filters. It also serves as a guide for the proper selection and use of particulate respirators. This new system for rating filters helps you determine the proper filter to use when working around dusts, fumes, and mists. It also gives you guidelines on how long you can use the filter.
Higher efficiency means lower filter leakage.
The OSHA regulations will identify exposure limits. You can perform your own calculations for HR, or work with the lab that measures the results from the monitoring. Consult the respirator manufacturer or safety equipment distributor for the APF of the respirator used. Once the proper filter is selected, know when to replace it. They must be replaced when they are soiled, damaged, or there is a noticeable increase in breathing resistance.