Directair 4 Series control valves are designed to control / toggle the flow of liquids& in the agriculture, water treatment, chemical and petroleum industries. These air control valves come equipped with fluorocarbon seals and a stainless steel spool that provide increased temperature tolerance and chemical compatibility. They& feature parallel and perpendicularly mounted handles for easy & quick operation and are available in aluminium, anodised aluminium and bronze variants. These control valves require& clean air, are pre-lubricated for increased durability and can operate at& temperatures from -15 to 200 degrees F. Choose from a wide range of three-position manual air control valves, available in lengths ranging from 4.25 to 10 inches on Raptor Supplies.