TradePro - Nitrogen Regulator with a CGA580 Inlet. A medium/heavy duty single stage nitrogen regulator with a machined brass body, polished chrome bonnet, and easy-to-read single scale contents gauge and delivery gauge. It has a right hand 5/8"-18 female outlet connection with a delivery pressure of 5-125 PSI. It also includes an externally serviceable pressure relief device (PRD) which protects the regulator. The PRD is not designed to protect the downstream equipment. Single stage regulators are used for general purpose applications where nominal delivery pressure changes, due to decreasing cylinder pressure, do not affect operations. Single stage regulators have greater flow capacity than two stage models.