Model "HP-1+6+S" Diff. Press Reducing Regulator For Nace Service; 1/2" Size; Wcb Body & Spring Chamber; S40t Trim: 316SST Cylinder,316SST Plug With Tfe Seat,Fluorocarbon;Elastomer Diaphragm; Sae Threaded Connection; 15-40 PSId Range Spring (Inconel X750); Per Spq/Ma Drawing 32909- With TFE Diaphragm Covers;