Safety valve and pressure relief valve
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Overview, definition and difference between safety valves and relief valves 1. Overview Safety valves are important safety accessories on boilers, pressure vessels and other pressure equipment. Its action reliability and performance are directly related to the safety of equipment and people, and are closely related to energy saving and environmental protection. Some users and design departments always choose the wrong model when selecting models. For this reason, this article analyzes the selection of safety valves. 2. Definition So-called safety valves include relief valves in a broad sense. From the perspective of management rules, valves that are directly installed on steam boilers or first-class pressure vessels. The necessary condition is that they must be approved by the technical supervision department. In a narrow sense, they are called safety valves. Others are generally called relief valves. Safety valves and relief valves are very similar in structure and performance. Both of them open when the valve exceeds the limit.
Agreed, use safety valves for pressure vessels.
Generally speaking, pressure relief valves are needed to ensure that the operating pressure does not exceed a certain level. Safety valves are used to protect the safety of equipment. Generally, the set pressure of the pressure relief valve is smaller than the set pressure of the safety valve.
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The safety valve and pressure relief valve mentioned by the poster are similar in that they can both relieve pressure and protect equipment and facilities. However, they are different in structure. One is mainly installed in specific environments such as special equipment and needs to be tested and calibrated regularly. It will act when the pressure rises to the set pressure or opening pressure. ； One is to install it on the process system. As long as the valve quality is qualified and the pressure level meets the requirements of the process parameters, it generally only needs regular maintenance to ensure that it is flexible and easy to use. There is no need to send a qualified unit to verify the parameters, which is also called a vent valve. When the system pressure is abnormal or maintenance work is required, the operator can perform the venting operation, and an automatic pressure regulating valve can also be used instead. This post was last edited by jyszyx on 2009-4-8 12:43 ]