Model 1078 Rev B Pilot Operated Tank Blanketing Valve Vacu-Gard; 1" Size; Vertical Outlet Position. Remote Sensing; Stainless Steel Body And Trim, Carbon Steel Diaphragm Cases, Stainless Steel Fittings And Tubing, Non-Stainless Steel Pressure Gauges When Required; No Pressure Gauges; 1" Class 150 Threaded Flange End Connections; 100% Flow Plug; Fluorocarbon Elastomer (FKM) Soft Seats And Seals; 0.5" - 5.0" WC Range Spring; Aluminum/Zinc External Pilot Filter; Per SPQ 57162 1" ASME 150 End Connections With Special Inlet Flange Face To Outlet Flange Center Dimension Of 5.89"And Outlet Flange Face To Inlet Flange Center Dimension Of 3.47"