Self-reliance type pressure regulating valve is a kind of self-reliance type regulator, because do not need other foreign energy such as electricity, gas, only rely on media's own energy to drive, both energy saving and environmental protection, easy to use, after the installation is set pressure value can be put into automatic operation, so the control accuracy is not high, and the lack of electricity, gas, has been more and more widely used. Self-reliance type pressure regulator, however, need to correct selection and correct installation, use, to ensure that after put into operation without any problem. Selection is needless to say, such as regulating Industrial Valves is used to control valve pressure before and after valve pressure, the medium is normal temperature or high temperature, with or without corrosion, the highest working pressure, etc. , must be clear in advance, we mainly talk about the problem of installation using aspects. Because I have recently encountered a case of a self-help type problems, the use of pressure regulating valve is typical. Valves are used in steam pipe, put into use in just one or two months, the user is hot. To the scene, a large number of steam from the eduction in regulating valve film head vent, noise big, honking. The cause of the accident, is clearly didn't steam through condensation, head directly into membrane, burned the diaphragm. Pressure regulating valve for steam pipeline of self-reliance type, installation must be between actuators and pipe and a condensing tank, head can not allow the steam into the actuator membrane, and regulating valve must be installed upside down, condensing tank than film head, first time to use, must be the condensing tank and membrane head filled with water. Look at the site of the installation, researchers asked the field instruments, these are no problem, then what causes? Head-scratching puzzlement. Later, carefully ask an operator, has no intention of that under the table, put into use after installation of valve, steam trap and membrane between the copper tube joint has been leaking by fits and starts. Turned out to be such, water leakage cause condensation jar slowly light-leaking, steam will head into the membrane, burned the diaphragm. Thus, self-reliance type pressure regulating Industrial Valves used on steam pipe, installation and maintenance must pay more attention to, in order to ensure the normal operation of valve, must not let joint leakage, can't let condensing tank water, should be check regularly, timely add water. In fact, not only is the self-reliance type pressure regulator, is other self-help type of regulator, when use should also pay attention to maintenance and maintenance. In addition, if high steam pressure, had better choose piston actuator, and not take diaphragm actuator, because the diaphragm can withstand the pressure is less than 0. 4 mpa, although this can, but will greatly reduce the service life.
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