VALVES offers a wide variety of DBB valves to meet different kind of applications:- Integral DBB Valve are used in the instrumentation systems. Flange to Flange, Flange to Thread, Injection and Sampling with Ball and Needle Configurations. VALVES Integral Double Block & Bleed Valves are equipped with a drain needle valve mounted between the two balls. This permits to drain the valve and reset the pressure to zero.