Safety valve and discharge valve for an overview of definition and distinction between

First, an overview of

     Safety valve is a boiler, pressure vessels and other pressure equipment subject to the security of an important attachment. Reliability and performance of its actions have a direct bearing on the safety of equipment and personal, and with energy-saving and environmental protection are closely related. However, some users and the design department at the selection, it always chose the wrong model. In this paper, the choice of safety valve for this analysis.

Second, the definition of

     Broad sense, including the so-called safety valve discharge valve, from a management point of view the rules, directly installed in the steam boiler or pressure vessel on a class of its necessary conditions for technical supervision departments must be approved valves, called the safety valve on the narrowly Other commonly known as discharge valve. Safety valve and the discharge valve in the structure and performance is very similar, both are more than open automatically when the pressure within the discharge medium, in order to ensure the safety of production equipment. From the dry nature of the existence of such a similar nature, people use, often confuse the two, In addition, some production facilities are also provided in the rules which can be chosen. Therefore, the difference between the two are often neglected. So also there were many question. If you want to make a more precise definition of the two may in accordance with "ASME Boiler and Pressure Vessel Code," first enunciated in the definition to understand:

     (1) safety valve (Safety Valve)

     A kind of static pressure from the valve before the media-driven automatic pressure relief device. It is characterized by a sudden opening of the full-open action. For gas or steam occasions.

     (2) Relief Valves (Relief Valve)

     Also known as the relief valve of a static pressure from the valve before the media-driven automatic pressure relief device. It is with the pressure over opening force to open in proportion to the growth. Is mainly used for fluid occasions.

     (3) Safety Relief Valve (Safety Relief Valve)

     Also known as the safety relief valve of a pressure-driven by the medium of automatic pressure relief device. According to the use of different occasions, both valid for the safety valve is also valid for the discharge valve. Japan, for example, to the safety valve and the bleed valve less clearly defined, the general large-scale energy storage such as a boiler pressure vessel safety device called the safety valve, installed in the pipeline or other established facilities in the said of the discharge valve. However, if according to MITI's "thermal technology" looks at the provisions on the device an important part of security, specify the use of safety valves, such as the boiler, superheater, reheater, and so on. Of the lower side in the valve needs and connecting the boilers and turbines of the occasion, they need to install the bleed valve or safety valve. In addition, from the Japanese Ministry of Labor of the high-pressure gas management rules, the Ministry of Transport and all levels of the ship association rules, the identification of safety and emissions regulations, we take the guarantee of the emissions called safety valve, but not guaranteed emissions, called the discharge valve valve. Kai-type in the country, whether full time or Enlight-type collectively known as the safety valve. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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