Model 1088 Rev B Spring Operated Tank Blanketing Valve Vacu-Gard; Horizontal Outlet Position, Internal Sensing; Stainless Steel Body And Trim With Epoxy Coated Carbon Steel Diaphragm Cases; No Gauges; 1/2" NPT End Connections; 10% Flow Plug; Fluorocarbon Elastomer (FKM) Soft Seats And Seals; 1.5 - 3 PSIG Range Spring; No External Filter