Double Block and bleed Valve that combines one or more lock/isolate valves, usually ball valves, and one or more bleed/vent valves, usually ball or needle valves, into one component for interface with other components for pressure measurement transmitters, gauges, switches, etc where used in hydraulic fluid system. The purpose of the block and bleed manifold is to isolate or block the flow of fluid in the system therefore the fluid from upstream of the manifold does not reach other components of the system that are downstream.