Hydraulic valve manifold and oil pipeline hole design requirements

Hydraulic valve manifold size

This article shares the hydraulic valve manifold size and oil line hole design requirements and precautions.To minimize diagonal holes and process holes in the hydraulic valve manifold, designers should ensure that they match the flow rate and hole size appropriately. Special attention should be given to ensuring that through holes provide sufficient circulation area. Designers should also pay attention to matching the direction and location of ports with the system layout and oil pipeline connections. Designers should consider the overall installation process and ensure it meets the requirements for vertical or horizontal installation components. If adjustments to operational components are necessary, designers should ensure they design them to be simple, easy to operate, and maintain.

Designers should determine the size of the hydraulic valve manifold based on the type and size of the components mounted on each face.Designers should maintain permissible wall thickness between oil passage holes, aiming for compactness, small size, and light weight.Designers should size manifold length based on layout and screw hole sizes.The width of the hydraulic valve manifold should be based on factors such as the type of valve, connection screws, and dimensions.They should determine the height of the hydraulic valve manifold according to the height of the components.


The role of the orifices in the hydraulic valve body is to control the hydraulic control system that links the various components. The size, shape and surface smoothness of the valve aperture will cause a reduction in the pressure of the oil through the hole. If the oil passage hole is too small and has surface roughness, it will cause a greater loss of pressure. Conversely, if the oil passage hole is too large, although it can reduce the amount of pressure loss, it will increase the volume of the hydraulic valve group.

Oil pipeline hole design requirements and considerations

Therefore, when designing the access holes in a hydraulic valve manifold, designers should:

  • Keep the length of the access holes as short as possible.
  • Minimize turns.
  • Determine the cross-sectional area of the access holes reasonably.

In the layout, designers should first create the passage holes in the hydraulic valve manifold based on the overall arrangement of the system. Then, they should conduct the main oil circuit, followed by completing the small passage diameter of the oil circuit and control oil circuit.

Hydraulic valves play a very important role in the hydraulic system. Any hydraulic system, no matter how simple, cannot lack hydraulic valves.Hydraulic machinery and equipment, with the same process objectives, can create diverse hydraulic system configurations. This is achieved by combining and utilizing hydraulic valves in various combinations, resulting in different oil circuit structures. Therefore, hydraulic valves are active components with a wide range of applications, featuring numerous varieties and specifications in hydraulic technology.

The rationality of a hydraulic system design, installation, and maintenance impacts its operational reliability. This largely depends on the performance and parameter matching of various types of hydraulic valves used.

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