How to choose RIGHT FRLs (air source treatment) and maintain FRL
Modular FRLs play an essential role in pneumatic components and air tools. Modular FRL is also called an air treatment unit, divided into an air filter, air lubricator, and air regulator(pressure reducer because they can only reduce the air pressure and can not boost more pressure). The three units can be used separately or make a combination to use. For example, air filter+air regulator = filter regulator, air filter+air regulator+air lubricator = three combinations or two combinations.