This AAF 3011087-001 variCel RF DH filter MERV 15 24" x 24" x 12" galv. steel frame is a filter/regulator in industrial equipment. It sits in the supply line to a pneumatic or hydraulic system, keeping the fluid or air clean and properly regulated. It is commonly in pneumatic FRL (filter-regulator-lubricator) assemblies and compressed air systems.
