Model HP-1+6+S Rev A Differential Pressure Reducing Regulator, NACE Service; 3/4" Line Size; Sales Kit B; Carbon Steel Body And Spring Chamber; S40T Trim: 316 Stainless Steel And PTFE Seat With Fluorocarbon Elastomer (FKM) Diaphragm; Per SPQ/MA Drawing Number 32909 with TFE Diaphragm Covers