Selection and application of control valve materials

In the automatic control of modern factories, control valves play a very important role. In these factories, control valves, based on the signals output by DCS and PLC, control the throttling elements inside the valves to change the throttling area of the valves, thereby regulating the pressure, temperature, flow rate and liquid level of the medium in the pipeline.

To ensure that the control valve effectively performs these functions, many conditions must be met, such as: selecting the appropriate type, structure, material, etc. of the control valve. Among them, the selection of materials is a very important link.

Due to the particularity of various fields, factors such as the pressure, temperature, corrosion of the medium, and the resource manufacturing processability of the materials must be taken into account, making the selection of materials extremely difficult. However, in general, the selection of materials can be divided into the following three aspects:

1. Meet the requirements of the usage function

To meet the usage functions, it is necessary to consider the working conditions of the control valve, namely the temperature, pressure and properties of the medium. For instance, materials should be selected based on whether there is corrosion, whether there are particles, the functions of each part, and the force conditions, etc. The most crucial thing is to ensure that the control valve works reliably in the corresponding environment.

Second, it has good processability

The processability mainly includes properties such as casting, forging, cutting, heat treatment and welding.

Third, it has good economic performance

Economy means manufacturing products that meet performance requirements at the lowest possible cost. The quality of economy can be evaluated by the relationship among value, performance (function) and cost.

Three ways to enhance product value: keep performance unchanged, reduce costs; keep costs unchanged, improve performance; increasing costs to a certain extent leads to a greater improvement in performance. It is particularly necessary to note that the processability and economy should comply with the requirements of the performance in use. That is to say, under the premise of ensuring the performance in use, efforts should be made to have good processability and economy. There is no such thing as a perfect material. When choosing materials, one must consider comprehensively and address the main contradiction. For the specific selection and application of control valve materials, it is hoped to contact a more professional technical company. Viti Industry is a German valve manufacturer that has been engaged in the production of a full range of valve products represented by automatic control and regulating valves, mainly applied in harsh working conditions such as high pressure, high temperature, easy erosion and corrosion. W&T has new engineering personnel and production equipment to develop and produce valves according to customer requirements. It has outstanding engineering achievements in all important industrial fields and collaborates with universities and related institutions in the areas of material development, fluid engineering thermodynamics, design and production.