safety valve types
At present mass-produced Safety valves are spring type and lever type. There are also impulse-type safety valve, pilot-type safety valve, safety switching valve, safety decompression valve, static weight safety valve, etc. Spring-type safety valve relies mainly on the work of the spring force, spring-type safety valve is also have closed and not closed, generally flammable, explosive or toxic media should use enclosed, steam or inert gas, etc., may choose not closed type, and it also has wrench or not have, the main function of wrench is to examine disc flexibility, and sometimes can also be used manually emergency pressure relief. Lever-type Safety valve mainly relies on the force of lever heavy hammer to work, but because of lever-type safety valve is often bulky and limit the scope of choice. When the temperature is higher, should be chosen the safety valve with a radiator. The main parameter is displacement, which is determined by the diameter of the seat and disc opening height, from the opening height difference, it can be devided into low lift type and fall lift type. The low lift means the disc open height is 1 / 40 ~ l/20 of the seat throat diameter, fall lift type means the disc open height is 1 / 4 of the seat throat diameter
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