New from Bosch Rexroth Group is its AS2 series of FRLs for lightweight, polymer-based compressed air preparation. In the AS2 series, the individual processes for air preparation (filtering, regulating, lubricating and draining) are combined into a single unit geared toward user requirements, such as easy component removal in an assembled state. The AS2 series of FRLs have a modular design that allows individual parts to be exchanged while the system is fully assembled. A patented oil filling system is used to directly feed oil into the system via a hose from the reservoir. This process protects the maintenance unit from becoming fouled up by oil. The lubricator is surrounded by a polyamide protective guard with a large inspection window that makes it easy to see the oil level. The entire unit can be secured by multiple padlocks and using the built-in locking mechanisms.