Control Blocks for Hydraulic Valves

Control Blocks for Hydraulic Valves

Although the control unit has only an indirect effect on the advantage of the high hydraulic power density, it is still indispensable for the performance of the technology. How control blocks regain their reputation in the hydraulic production environment can be seen in the efficiency of the entire system.

A control unit in the hydraulic system consists of a combination of components to enable the system to perform the desired motion at the desired speed, with the required force and characteristics. Limited installation space and series requirements

For example, a control unit with screw cartridges makes sense. This construction option results in a compact and therefore weight-optimized solution. If the manufacturer is using the same block, vehicle options can also be improved at assembly or at the customer. Mixed with Cetop valves, this control unit has proven to be a practical solution in a variety of applications. In combination with screw cartridges, it represents a targeted and efficient solution in many applications.

Countersunk shapes increase flexibility
The control block can have a positive effect on the efficiency of the overall system, comparable to an engine gearbox. But in hydraulics, the engineer must be aware of the pressure drop. It determines the selection of sections and flow lines. Permissible weight in mobile applications is an important criterion for construction technology
An ideal structure of Hydraulic Valve blocks is deceiving. It is always the product of priorities and the resulting compromises. There are many options the designer can use to find a suitable application solution. It develops a specific solution, significantly influenced by the customer's specifications. The planned number of parts, pressure, volume flow and expansion demands are included in the planning. This results in a decisive advantage: The flexible arrangement of components and connections provides a highly customer-oriented solution. Compact arrangement saves valuable weight and increases the efficiency of the system. This reduces upstream drive power. In the downside, it facilitates the assembly of the machine.
However, the weight is highly dependent on the working pressure. Basically the application limit for aluminum blocks is a maximum of 200 bar. For higher pressure you need a steel-based material. The ratio of the material density of aluminum to steel is around 1 to 2.9, naturally, also affects the weight difference of the foundation block. If the engineer uses standardized countersink shapes, he can further increase flexibility for the consumer. Thus, it is possible for the end customer to always offer certain functions to the end customer, optionally in different actuation types (mechanical, electrical, hydraulic or pneumatic) on the same interface.

Corrosion protection for control units

In mobile applications, corrosion protection levels are another determining criterion in the requirement profile of the relevant system. The higher the required level of corrosion protection, the more decisive the supplier selection for the components and control unit is. This is important because there are different levels of corrosion protection: from the minimum protection of the galvanized coating to the consistent solution of components, magnets and control units, from acid-resistant steel (AISI 316L) for permanent protection against the harsh climate in the open sea or chemical industry. Protective coating, in addition to the properties of the base material, is a full-fledged alternative up to the standard C5.

Control Blocks for Hydraulic Valves

Control Blocks for Hydraulic Valves

Corrosion protection for control units

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