Application Requirements of Regulating Valves in Modern Industry

Advanced modern industry is marked by production automation. From the development history and progress of automation system, the change of technical tools plays a very important role. A variety of advanced control means continue to appear, but the basic control rule has not changed, while the improvement of technical tools is changing rapidly.

How to produce better various types of valves? How to improve product quality standards? How to operate more effectively and safely? How to make full use of resources, save energy and protect the ecological environment? People have put forward higher requirements for regulating valves. These requirements of products are more stable quality, more reliable work and safer operation in process control. The regulating valves are in direct contact with the fluid. Once it fails, the consequences will be unimaginable.

Ⅰ. The importance of regulating valves

In the petroleum industry, from oil fields to refineries, all kinds of production devices are monitored and controlled on a large scale. Most of the operating conditions are carried out under high temperature and low pressure or high temperature and high pressure. The media are all kinds of flammable and explosive oil products. Therefore, the reliability and fire resistance of regulating valves are put in the first place. In the chemical industry, the diversity of processes and the change of process conditions have very special problems in the control and implementation of four thermal variables: temperature, pressure, meteor and liquid level, which require the regulating valves to be applicable.

In the power industry, the thermal power plant should control the boiler. It is very important to maintain the normal water level in the boiler regulation system. It is important to avoid the wrong opening and closing of the regulating valves. At this time, being clear about the working principle such as double regulating valve working principle is very important.

Ⅱ. Application requirements of regulating valves in modern industry

1. To ensure the quality of regulating valves, the selection of regulating valves shall be subject to strict calculation. The type, caliber and various properties shall meet the requirements. The materials of various parts of the control valve shall be strictly selected, have sufficient strength and stiffness, and pass the pressure test, air tightness test and other tests according to the standard. The manufacturing technology and test methods of the valve suppliers meet the standards and shall be signed and approved by the competent department. It is strictly prohibited to carry out production in small control valve suppliers without production conditions.

2. To ensure reliable operability, it not only refers to the manufacturing quality of the regulating valves, but also includes the training and quality improvement of operators. In order to prevent mis-operation, process personnel must pay attention to the precautions indicated on the nameplate. The arrow and DN value indicating the medium flow direction and the words and values of PN shall be cast or punched out on the valve body. Important regulating valves shall have sufficient accessories, such as positioner, limit switch and so on. There shall be sufficient installation space and operation space, sufficient installation space and operation, sufficient lighting and strict operating procedures.

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