Norgren excelon pro bl92 combination pneumatic filterregulator and lubricator norgren bl92 231g this pre mounted compressed air maintenance unit is a combination of a gate valve filter regulator and lubricator the unit has a transparent bowl that comes with a manual drain and there is also an accurate pressure gauge a mounting bracket makes installation easy and there are no tools required for assembly norgren bl92 231g filterregulatorlubricator with shut off valve g14 port