Model 1078 Rev B Pilot Operated Tank Blanketing Valve Vacu-Gard; 2" Size; Vertical Outlet Position, Remote Sensing; Carbon Steel Body And Diaphragm Cases; Stainless Steel Trim, Fittings, And Tubing; Non-Stainless Steel Pressure Gauges When Required; No Pressure Gauges; Special End Connections; 100% 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