The importance of regulating valves

The importance of regulating valves

The importance of the regulating valve:

The regulating valve is used to regulate the flow of the operating variable and is therefore referred to as a regulating valve. From the whole control system, a control system is controlled to be good, all of which are to be realized through the regulating valve. For the following reasons, the regulating valve becomes very important.

1. The regulating valve is a throttling device, which belongs to a moving component, and is compared with the detection element and the transmitter and the controller, and in the control process, the regulating valve needs to constantly change the flow area of the throttling element, so as to change the operating variable so as to adapt to the change of the load change or the operating condition. Therefore, higher requirements for sealing, pressure resistance, corrosion, etc. of the valve assembly of the regulating valve are put forward. For example, the seal can increase the friction force of the regulating valve, the dead zone of the regulating valve is increased, and the control quality of the control system is deteriorated.

2. The movable part of the regulating valve is the main cause of running, running, dripping and leakage. It not only causes the waste of resources or materials, but also pollutes the environment and causes the accident.

The contact medium of the regulating valve material may be different from the contact medium of the detection element, so that the corrosion resistance, strength, rigidity and the like of the regulating valve are required to be higher.

3. The throttling of the regulating valve consumes the energy inside the valve, so it is necessary to choose and take into account the reasonable choice between reducing the energy consumption, reducing the pressure loss of the regulating valve and ensuring the better control quality.

4, the regulating valve also causes noise while throttling the fluid, for example, when the outlet pressure of the regulating valve is lower than the steam pressure of the liquid, the flash is caused, and when the pressure downstream of the regulating valve is higher than the steam pressure of the liquid, cavitation is caused. The noise caused by the regulating valve is related to the design of the regulating valve flow path, the operating pressure, the characteristics of the controlled medium and so on. Therefore, reducing noise, reducing pressure loss and so on put forward higher requirements for the regulating valve.

5, the adaptability of the control valve is strong. It is installed in various production processes, the high temperature, low temperature, high pressure, small flow rate and other operating conditions of the production process need to regulate the valve has a variety of different functions, the regulating valve can meet the requirements of different applications.

6, detection components and transmitters, controllers and other rapid development, investment in more manpower and material resources. Relatively speaking, it is generally considered that the structure of the regulating valve is simple, so the manpower and material resources invested in the research and development of the regulating valve are relatively insufficient.

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