A manifold is composed of hydraulic valves connected to each other . The hydraulic manifold distributes hydraulic oil throughout a circuit. The flow of pressurized oil is regulated by hydraulic valves installed within the manifold and directed through hoses to some kind of work device, such as a hydraulic motor or a cylinder.
In addition to providing a neat and logical layout, consolidating components into a manifold reduces space, pressure drop, requires fewer fittings, less assembly time, and reduced leak points. However, if a system is properly designed and test points provided in key locations, finding the problem becomes much quicker and simpler. If transducers are connected to these test points, the data may be linked into the machine PLC and even displayed by the HMI.
Typical applications include machine tools, material handling equipment, food processing, marine, off-highway equipment, heavy construction equipment, oil field and farm equipment etc.
The Manifolds are usually made of steel, with passages Drilled , milled or machined . Internal passages can be cut to any shape needed, so nearly any flow rate can be accommodated with minimal pressure drop.
Valves and other connections can be selected where appropriate for a specific application . As the name implies, the blocks are drilled to provide circuit paths and flow passages. Valves can be placed as desired but the drilled passages must be straight. Other drilled-block manifolds accept cartridge valves into cavities drilled into the Manifold . Interconnecting flow passages travel through the manifold from the valve cavities. Some cartridge valves have threaded bodies that hold them in threaded cavities; others slip into smooth cavities where they are retained by plates on the manifold surface .
The blocks are usually made of ductile iron, aluminum, or steel. Blocks can be custom designed or standard. End plates usually seal the ends of the assembled manifold, but these plates also can be drilled for pump and tank connections.
Interconnecting, divider, and spacer plates are usually installed between the basic building blocks. Interconnecting plates divert flow from one passage to another between blocks, or stop flow between blocks by plugging a passage.
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