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 Connections; 40% Flow Plug; FFKM 1 Soft Seats And Seals; 0.5" - 5.0" wc Range Spring; Aluminum/Zinc External Pilot Filter; 2" Class 150 Threaded Flanges With Special Face - Face Dimension A: 8.03" (204.1 mm), Dimension B: 4.5" (114.3 mm)