High pressure hydraulic manifold design considerations

With the increasing popularity of hydraulic cartridge valves, more and more people recognize the importance of high pressure hydraulic manifold in hydraulic systems, and their applications are becoming more and more widespread, which is a positive development? Today we will go through the following introduction, together to understand the high pressure hydraulic manifold related content.

Advantages of High Pressure Hydraulic Manifold

A high pressure hydraulic manifold is a type of hydraulic element that can operate in various ways to control hydraulic oil. Engineers typically use it in conjunction with solenoid valves to easily achieve automation control. It facilitates remote control of hydroelectric power station oil, gas, and water pipeline systems for on and off operations. Hydraulic valves, such as pressure control valves, flow (speed) control valves, and directional control valves, allow for achieving complex actions or functions. Engineers often need to use multiple valves to accomplish these controls, and they connect these valves using hydraulic valve blocks.Using a high pressure hydraulic manifold allows hydraulic design to more easily achieve standardization and modularity, significantly enhancing design flexibility and convenience. High pressure hydraulic manifolds also make hydraulic systems more compact and integrated, thus reducing costs.

Design Basis The valve block body shall be designed with the following relevant written information:

a) A correct and detailed hydraulic schematic diagram of the block;
(b) Hydraulic operating parameters and control requirements;
(c) the shape of the valve block, oil port layout and installation and connection requirements.

High Pressure Hydraulic Manifold Fabrication

  1.  The surface roughness of the mounting valves and flanges on the high-pressure hydraulic manifold should reach Ra0.4, and the surface roughness of the sealing surfaces of the end pipe fittings should reach Ra3.2. In addition, the perpendicularity tolerance between the screw holes of the mounting pipe fittings and their outer fitting surfaces should be at least grade 8.
  2. Engineers should apply machining accuracy requirements to all screw holes on the valve block, typically opting for a 7H fit.The machining accuracy of threaded cartridge valve mounting holes should adhere to the requirements of the product samples, with the roughness of the cartridge valve mounting hole being Ra0.8, in addition to the size tolerance and shape tolerance requirements.0-ring groove surface roughness Ra3.2, the surface roughness of the general flow path Ra12.5.
  3. High pressure hydraulic manifold should preferably be made of 35 forged steel, and the general valve block should be made of A3 steel or ductile iron. When cutting the material for the valve block from the plate by gas cutting, operators should leave sufficient machining allowance, and it is advisable to forge the blank of the valve block before machining. Processing of the valve block material needs to ensure that the internal organisation of dense, there shall be no interlayers, trachoma and other defects, if necessary, the blank should be flaw detection. Before machining, engineers should age and pretreat cast iron blocks and larger steel blocks.

High Pressure Hydraulic Manifold Design Considerations

1.High pressure hydraulic manifold design, the oil circuit should be as simple as possible, minimise deep holes, slant holes and process holes. The flow-matching valve block in the aperture requires special attention to ensure that the hole through the aperture has sufficient through-flow area. When determining the direction and location of the inlet and outlet, engineers should align them with the overall layout of the system and the form of pipeline connections. During installation and operation, engineers must consider whether vertical or horizontal installation is necessary to ensure that the components meet the installation requirements.

2.When designing adjustable components for work adjustment, engineers should consider the convenience of operation and observation. For example, relief valves, speed control valves, and other adjustable components should be positioned with adjustment handles for easy operation.

3.Components that need frequent maintenance and key components such as proportional valves, servo valves, etc. should be on the top or outside of the valve block, so as to facilitate disassembly and installation. Additionally, when designing the valve block, engineers should ensure to incorporate a sufficient number of pressure points for debugging purposes. For valve blocks weighing more than 30kg, engineers should include lifting screw holes, while ensuring that the volume of the valve block remains as compact as possible to meet operational requirements.

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