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 Pressure Gauges; 3/4" x 1/2" ASME 150 Threaded Reducing Flange End Connections; 100% Flow Plug; Fluorocarbon Elastomer (FKM) Soft Seats And Seals; 1 - 1.5 PSIG Range Spring; No External Filter