filter regulator talk

Hey guys, as there are loads of different versions of airline equipment, I am interested in understanding what airline equipment a pneumatic system really requires. I understand that filter regulators can increase efficiency, but there's a range of equipment that can help increase efficiency. Wondering what everyone's opinons are of filter regulators. Also, has anyone got any articles that explain the different types of equipment or can point me in the direction of whats needed?
 
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