Model 1078 Rev B Pilot Operated Tank Blanketing Valve Vacu-Gard; 1" Size; Horizontal Outlet Position, Remote Sensing; Hastelloy Body With Hastelloy Trim, All Wetted Parts Are Hastelloy, Epoxy Coated Carbon Steel Upper Diaphragm Case; No Pressure Gauges; Threaded 1" FNPT End Connections; 25% Flow Plug; Fluorocarbon Elastomer (FKM) Soft Seats And Seals; 0.5" - 5.0" WC Range Spring; Hastelloy External Pilot Filter