The LSP Series of all-brass oxygen pressure regulators provides enhanced safety features. The uni-body construction is designed to strengthen the regulator, minimize potential leak paths and prevent breakage of the yoke cylinder connection assembly. For additional safety, inlet filters provide gas filtration down to 20 microns. LSP regulators offer 12 flow positions. Equipped with up to two DISS check valves, LSP regulators provided regulated pressure and flow for the operation of two demand valves, or one demand valve and one aspirator, or any pneumatically-powered ventilator. A DISS or hose barb adjustable flow outlet permits attachment of a disposable mask, cannula or bag mask device.