Home / Aztec / DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBBT) DOUBLE BLOCK VALVE, FLANGE X THREAD (MODEL NO. DB-FBBT) Category: Aztec Related products DOUBLE BLOCK VALVE, FLANGE X FLANGE (MODEL NO. DB-FBNF) MONOFLANGE MANIFOLD VALVE SINGLE BLOCK AND BLEED VALVE, FLANGE x THREAD (MODEL NO. SBB-FBNT) DOUBLE BLOCK AND BLEED VALVE, FLANGE X FLANGE (MODEL NO. DBB-FBNBF)