The Amico AM 250 Series Regulator shall be for a line supply of a single stage and medium duty type. Application and Uses. Medium to high capacity Ideal for welding and cutting applications Compact, single stage construction. Design Construction. Forged brass body and housing cap 2″ (5.1 cm) gauges Stem type seat mechanism External self reseating relief valve Sintered inlet filter. Performance Maximum Inlet – 3000 PSIG Maximum Delivery Range – 350 PSIG.