REGAL 3 Series is a direct-operated, spring setpoint pressure regulator, used for supplying industries and commercial businesses. As an option, it can be equipped with a slam-shut Type VSX2 or OS2 which permits the gas flow to be cut off rapidly and totally in the case of under or over outlet pressure. As a standard feature for outlet pressure settings inferior or equal to 180 mbar, a relief valve is provided. REGAL 3 Series is in conformity with the Pressure Equipment Directive PED 2014/68-UE and is classified in Category I.