Model 1078 Rev B Pilot Operated Tank Blanketing Valve Vacu-Gard; 2" Size; Vertical Outlet Position, Remote Sensing; Carbon Steel Body With 316 Stainless Steel Trim And Carbon Steel Diaphragm Cases, Stainless Steel Fittings And Tubing; Standard Steel Gauges When Required; No Gauges; Special Connections; 60% Flow Plug; Fluorocarbon Elastomer (FKM) Soft Seats And Seals; 0.5" - 5.0" Wc Range Spring; Aluminum/Zinc External Pilot Filter; With Special 2" Class 150 Threaded Flange End Connections With Face-Center Dimension A Of 8.03 (204.1 mm) And Face-Center Dimension B Of 4.5" (114.3mm) Per Technical Bulletin