Everything about Block And Bleed Manifold totally explained
A
block and bleed manifold is a
hydraulic manifold that combines one or more block/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 (pressure measurement transmitters,
gauges,
switches, etc.) of a
hydraulic (
fluid) system. The purpose of the block and bleed manifold is to isolate or block the flow of fluid in the system, so the fluid from upstream of the manifold doesn't reach other components of the system that are downstream, then bleed off or vent the remaining fluid from the system on the downstream side of the manifold. For example, a block and bleed manifold would be used to stop the flow of fluids to some component, then vent the fluid from that component’s side of the manifold, in order to effect some kind of work (maintenance/repair/replacement) on that component.
A block and bleed manifold with one block valve and one bleed valve is also known as an
isolation valve or
block and bleed valve; a block and bleed manifold with multiple valves is also known as an
isolation manifold.
Also used in combustionable gas trains in many industrial applications.
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