Double Block and Bleed Valves

Double Block and Bleed Valves: Double Block-and-Bleed Valve – API
Definition According
to API 6D “Specification for Pipeline Valves” Double block and bleed valves is a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces. Read More…