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 HIGH PRESSURE INSTRUMENT BALL VALVE IBV SERIES DOUBLE BLOCK VALVE, FLANGE X FLANGE (MODEL NO. DB-FBNF) DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBBT) SEPERATELY MOUNTED FIVE VALVE MANIFOLD 5VMS