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If you want to use the control valve correctly, especially select the control Didlink valve, you must first understand the control valve selection method, familiar with the structure and function of the control valve, so as to select the required control valve. If the control valve is improperly selected, it will bring a number of use problems, in addition to the use effect is not ideal, in terms of human, material and financial resources will also cause a waste, and even the life of the product, operation quality will have adverse effects.

The selection of control valve is as follows:

A. Importance of control valve selection

The regulating Didlink valve is the actuator in the automatic control system, and its application quality is directly reflected in the regulating quality of the system. As a terminal component in process control, people have a newer understanding of its importance than before. Control valve application, in addition to the product quality, whether the user is correct installation, use, maintenance, correct calculation, selection is very important. Due to the error of calculation and selection, the system starts and stops, and some even cannot be put into use. Therefore, users and system designers should understand the importance of valves in the field, and must pay enough attention to the selection of control Didlink valve.

B. Principles of control valve selection

1. Select the appropriate structure and material according to the process conditions.

2, according to the characteristics of the process object, select the flow characteristics of the control valve.

3. Select the appropriate caliber size of the control valve according to the process operation parameters.

4, according to the requirements of the process, select the required auxiliary equipment.

5. Select the executing agency reasonably. The response speed of actuator should be able to satisfy the process

Requirements for control travel time: the selected actuator of the control valve should be able to meet the requirements of the valve travel and the process for the leakage level. In some cases, such as the selection of pressure control valves (including the vent valve), should consider the actual possible differential pressure for appropriate amplification, that is, the actuator is required to provide a greater force. Otherwise, when abnormal conditions may occur in the process, the actual pressure difference between the front and rear of the control valve is large, will not close or open the danger. There are many kinds of control valve body, palm control valve selection method, the correct selection of control valve, is very important, so that the stability of the system and high efficiency operation is very beneficial. In addition, the control valve selection method involves a lot of content, a little careless, will lead to improper selection.

Due to the wide application of control valves, especially in some public places, we should pay special attention to fire prevention, explosion protection, leakage prevention, etc., the requirements are higher. In addition, the control valve noise pollution problem can’t be overlooked, has gradually bow from the attention of the relevant departments.