Non Return Swing Check Valve with Lever and Weight, Flange connection acc.DIN EN 1092-2, Face to face acc. DIN EN 558, series 48 (F6), 100% free opening, Body: GGG50 / EN-GJS-500-7, Spindle: AISI-420/EN 1.4021 (X20Cr13), Bolts: stainless steel A2-70/SS304. Including A2 Drain Plug. Coating: Epoxy Coating RAL-5015 min 250 µm acc. RAL-GSK.