Model DA4 Rev E Pressure Loaded Reducing Regulator; 1-1/2" Line Size; Ductile Iron Body With Ductile Iron Loading Chamber; P8 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, GF-TFE Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; Lower Spring 2-5 PSIG Range; Internal Sensing