Home / Aztec / DOUBLE BLOCK VALVE, FLANGE x FLANGE (MODEL NO. DB-FBBF) DOUBLE BLOCK VALVE, FLANGE x FLANGE (MODEL NO. DB-FBBF) Category: Aztec Related products MONOFLANGE MANIFOLD VALVE DOUBLE BLOCK AND BLEED VALVE, FLANGE X FLANGE (MODEL NO. DBB-FBNBF) SEPERATELY MOUNTED FIVE VALVE MANIFOLD 5VMS DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBNT)