Modular FRL is also called air preparation unit, which is divided with air filter, air lubricator and air regulator(pressure reducer, because they only can reduce the air pressure and can not boost more pressure ). The three units can be use separately or make a combination to use. For examples, air filter+air regulator = filter regulator, air filter+air regulator+air lubricator = three combination or two combination. Modular FRLs play important role for pneumatic components and air tools. Air filter can remove dust and water from compressed air Air lubricator can lubricate the components with air. Air regulator can get stable air supply and the pressure you want. For detailed specification and model, please check www.xpneumatic.com/pneumatic-components/air-preparation/ Advantage Easy replacement of the element The element and the bowl are in one piece. Replacement can be done with simple tool. Reduced required maintenance space: Max. 46% reduction Bett