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Block and bleed manifold

 

 
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Block and bleed manifold
 
 
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A block and bleed manifold is a hydraulic manifold
Hydraulic manifold

A hydraulic manifold is a component which regulates fluid flow between pumps and actuators and other components in a hydraulic system. It is like a Electric switchboard in an electrical circuit because it lets the operator control how much fluid flows between which components of a hydraulic machinery....
 that combines one or more block/isolate valves, usually ball valve
Ball valve

A ball valve is a valve that opens by turning a handle attached to a sphere inside the valve. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur....
s, and one or more bleed/vent valves, usually ball or needle valve
Needle valve

A needle valve is a type of valve having a small orifice and a threaded, needle-like plunger.It allows precise regulation of flow, although it is generally used for, and is capable of, only relatively small flow rates....
s, into one component, for interface with other components (pressure measurement transmitters, gauge
Gauge (engineering)

In engineering, a gauge or gage, is used to make measurements. Various types of gauges include:...
s, switch
Switch

In electronics, a switch is an electrical component which can break an electrical circuit, interrupting the Electric current or diverting it from one conductor to another....
es, etc.) of a hydraulic
Hydraulics

Hydraulics is a topic of science and engineering dealing with the mechanical properties of liquids. Hydraulics is part of the more general discipline of fluid power....
 (fluid
Fluid

A fluid is defined as a substance that continually deforms under an applied shear stress. All liquids and all gases are fluids. Fluids are a subset of the Phase and include liquids, gas, Plasma physics and, to some extent, plasticity ....
) 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 does not 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.






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Encyclopedia


A block and bleed manifold is a hydraulic manifold
Hydraulic manifold

A hydraulic manifold is a component which regulates fluid flow between pumps and actuators and other components in a hydraulic system. It is like a Electric switchboard in an electrical circuit because it lets the operator control how much fluid flows between which components of a hydraulic machinery....
 that combines one or more block/isolate valves, usually ball valve
Ball valve

A ball valve is a valve that opens by turning a handle attached to a sphere inside the valve. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur....
s, and one or more bleed/vent valves, usually ball or needle valve
Needle valve

A needle valve is a type of valve having a small orifice and a threaded, needle-like plunger.It allows precise regulation of flow, although it is generally used for, and is capable of, only relatively small flow rates....
s, into one component, for interface with other components (pressure measurement transmitters, gauge
Gauge (engineering)

In engineering, a gauge or gage, is used to make measurements. Various types of gauges include:...
s, switch
Switch

In electronics, a switch is an electrical component which can break an electrical circuit, interrupting the Electric current or diverting it from one conductor to another....
es, etc.) of a hydraulic
Hydraulics

Hydraulics is a topic of science and engineering dealing with the mechanical properties of liquids. Hydraulics is part of the more general discipline of fluid power....
 (fluid
Fluid

A fluid is defined as a substance that continually deforms under an applied shear stress. All liquids and all gases are fluids. Fluids are a subset of the Phase and include liquids, gas, Plasma physics and, to some extent, plasticity ....
) 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 does not 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.

www.colson.co.uk/Double-Block-&-Bleed-Valves.html