安全阀的选用（Selection of safety valve）.docVIP

安全阀的选用（Selection of safety valve） Selection of safety valve I. overview Safety valves are important safety accessories on boilers, pressure vessels and other pressure equipment. Its reliability and performance are directly related to the safety of equipment and people, and closely related to energy conservation and environmental protection. And some users and design departments in the selection, always choose the wrong model. Therefore, the selection of safety valve is analyzed in this paper. Two definitions Broad sense including the so-called safety valve discharge valve, from the rules point of view, directly installed in the steam boiler or pressure vessel, the necessary conditions must be recognized in valve technology supervision department, called the safety valve on the narrowly, other commonly known as the discharge valve. The safety valve and the relief valve are similar in structure and performance, and the two are automatically discharged inside the medium when the pressure exceeds the opening, so as to ensure the safety of the production device. By the existence of this kind of similarity in essence, people often confuse the two when they are in use. In addition, some production units also stipulate which ones are available in the rules. Therefore, the differences between the two are often overlooked. So there are many problems. Two if you want to make a more precise definition, may be in accordance with the definition of the ASME boiler and pressure vessel code in the first chapter to understand: (L) safety valve (Safety Valve) a static pressure from the valve before the media driven automatic pressure relief device. The utility model is characterized in that the full opening action with a sudden opening is realized. An occasion for gas or steam, as shown in figure 1. (2) relief valve (Relief Valve), also known as overflow valve, an automatic pressure relief device driven by the static pressure of the front of the valve. It opens with pressure as the fo