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 AND BLEED VALVE (MODEL NO. FBB-FBNNT) SINGLE BLOCK AND BLEED VALVE, FLANGE X FLANGE (MODEL NO.SBB-FBNF) DOUBLE BLOCK AND BLEED VALVE, FLANGE X THREAD (MODEL NO. DBB-FBNBT) MONOFLANGE MANIFOLD VALVE