Safety valve and relief valve overview, definition and distinction
March 16 12:20:10, 2021
I. Overview Safety valves are important safety accessories on boilers, pressure vessels and other pressurized equipment. The reliability and performance of its movement is directly related to the safety of equipment and people, and with energy conservation and environmental protection are closely related. And some users and design department in the selection, always choose the wrong model. To this end the selection of safety valve to be analyzed. Second, the definition of the so-called safety valve in the broad sense, including the relief valve, from the management point of view, directly installed in a steam boiler or a class of pressure vessels, the necessary conditions must be approved by the technical supervision of the valve, narrowly referred to as Safety valve, other commonly known as the relief valve. Safety valve and relief valve in the structure and performance are very similar, both in the opening pressure automatically discharge the internal media, in order to ensure the safety of the production plant. The existence of such an inherent similarity in the dry, people often use the two mix, in addition, some production facilities in the rules also provide for the choice of what can be. Therefore, the differences between the two are often overlooked. Thus there are many problems. If you want to make a clear definition of both, you can follow the "ASME Boiler and Pressure Vessel Code," the first part of the definition set out to understand: (l) safety valve (Valve) Driven automatic pressure relief device. It is characterized by having an open full opening action. For gas or steam occasions. (2) relief valve (Relief Valve), also known as relief valve A static pressure from the valve before the media driven automatic pressure relief device. It opens proportionally as pressure increases beyond the opening force. Mainly used for fluid applications. (3) Safety Relief Valve (Safety Relief Valve), also known as safety relief valve A pressure-driven by the media automatic pressure relief device. Depending on the use of the occasion not only for the safety valve is also suitable as a relief valve. In Japan, for example, safety valves and relief valves are clearly defined, and safety devices commonly used for large storage pressure vessels such as boilers are referred to as safety valves and are installed on pipelines or other facilities The relief valve. However, judging from the regulations of "thermal power generation technology" of the MITI, safety valves such as boilers, superheaters, reheaters, etc., are to be specified as a key part of the safety and security of equipment. In the lower side of the pressure reducing valve needs to be connected with the boiler and turbine occasions, need to install the relief valve or safety valve. So, safety valve requirements than the relief valve more reliable. In addition, judging from the rules and regulations of high-pressure gas regulations of Japan's Ministry of Labor and Ministry of Transport and shipping associations at all levels, we regard the guarantee of emissions as a safety valve without any guarantee The valve of discharge is called the relief valve. Whether in the country Kai-type or micro-Kai collectively referred to as safety valve. Second, the definition of the so-called safety valve in the broad sense, including the relief valve, from the management point of view, directly installed in a steam boiler or a class of pressure vessels, the necessary conditions must be approved by the technical supervision of the valve, narrowly referred to as Safety valve, other commonly known as the relief valve. Safety valve and relief valve in the structure and performance are very similar, both in the opening pressure automatically discharge the internal media, in order to ensure the safety of the production plant. The existence of such an inherent similarity in the dry, people often use the two mix, in addition, some production facilities in the rules also provide for the choice of what can be. Therefore, the differences between the two are often overlooked. Thus there are many problems. If you want to make a clear definition of both, you can follow the "ASME Boiler and Pressure Vessel Code," the first part of the definition set out to understand: (l) safety valve (Valve) Driven automatic pressure relief device. It is characterized by having an open full opening action. For gas or steam occasions. (2) relief valve (Relief Valve), also known as relief valve A static pressure from the valve before the media driven automatic pressure relief device. It opens proportionally as pressure increases beyond the opening force. Mainly used for fluid applications. (3) Safety Relief Valve (Safety Relief Valve), also known as safety relief valve A pressure-driven by the media automatic pressure relief device. Depending on the use of the occasion not only for the safety valve is also suitable as a relief valve. In Japan, for example, safety valves and relief valves are clearly defined, and safety devices commonly used for large storage pressure vessels such as boilers are referred to as safety valves and are installed on pipelines or other facilities The relief valve. However, judging from the regulations of "thermal power generation technology" of the MITI, safety valves such as boilers, superheaters, reheaters, etc., are to be specified as a key part of the safety and security of equipment. In the lower side of the pressure reducing valve needs to be connected with the boiler and turbine occasions, need to install the relief valve or safety valve. So, safety valve requirements than the relief valve more reliable. In addition, judging from the rules and regulations of high-pressure gas regulations of Japan's Ministry of Labor and Ministry of Transport and shipping associations at all levels, we regard the guarantee of emissions as a safety valve without any guarantee The valve of discharge is called the relief valve. Whether in the country Kai-type or micro-Kai collectively referred to as safety valve.
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