Model 330-350-540 Oxygen Liquid Cylinder regulator is designed for gaseous withdrawal from oxygen, carbon dioxide, argon and nitrogen liquid cylinders. Regulator provides accurate pressure regulation that is ideal for most industrial applications. It comes with 2" dual brass scale gauge and chrome-plated bonnet with brass adjusting screw for smooth adjustment. regulator incorporates 540 CGA-inlet and minimum 9/16" outlet with self-seating internal HP safety valve for safety. It features one-piece PTFE Teflon® encapsulated seat design with an internal filter and 2 3/4" stainless steel diaphragm. It is equipped with forged brass body and it conforms to CGA-E-4 standard for gas pressure regulators.