What does the "R" in R series respirators signify?

The "R" in R series respirators indicates that the respirator is resistant to oil. This designation is critical for users who may be exposed to oil aerosols in their work environment. The resistance to oil means that the respirator is suitable for use in conditions where there may be oil particles present in the air, allowing for a safer use in various industrial applications.

In contrast, other series of respirators exist, such as N series, which are not resistant to oil, and P series, which provide a higher level of protection and are also resistant to oil but are often used in more severe or hazardous conditions. Understanding the specific ratings and the implications they have on the suitability of a respirator in different work environments is crucial for safety and compliance with occupational health standards.