Self-pressure regulating valve because no other external energy sources such as power supply, gas supply, relying on the media's own energy to drive, energy saving and environmental protection, easy to use, the set pressure value can be input automatically after installation, so the requirement for the control accuracy is not high, the lack of power, gas source of the occasion, by the use of more and more widely. However, this valve also need the correct selection and proper installation, use, to ensure there are no any problem after put into operation. Needless to say the selection of areas, such as regulating valve is used to control the pressure before the valve or valve after the pressure, the medium is at room temperature or high temperature, with or without resistance, the maximum working pressure, etc., must first find out, the installation problems we mainly talk about the. Because of the use of I recently encountered one case of Self-pressure regulating valve problems, very representative.
The valve is used in the steam pipe, and put into use in just one or two months, the user repair. To the site a look, a lot of steam discharged from the exhaust hole, the first membrane valve in the great noise, momentum amazing. The cause of the accident, was not through the condensation of steam directly into the membrane, head, burned the diaphragm. Regulating valve for steam pipes self-pressure, the installation must be added a condensate tank between the actuator and the pipeline, can not let the steam into the membrane actuator head, and, control valve must be installed upside down, condensation can be higher than the film head, the initial use, must will head condensation and membrane tank with water in. See site installation, field instrumentation personnel asked, these no problem, then what is causing it? A puzzle. Later, asked in detail about an operator, under the intention that: This valve is installed, put into use, condensate tanks and brass fittings between the first film has been on and off the water leakage. This is the original, water leakage cause of water slowly leaked condensate pot, steam to enter the film head, burned the diaphragm.
Thus, Self-pressure regulating valve used in the steam pipe, installation, maintenance must be addressed, in order to ensure the normal operation of control valve, do not allow joint water leakage, condensation can not be allowed to dry, to regular inspection, timely water. In fact, not only is the Self-pressure regulating valve, is that other self-regulating valve, when in use, also need to pay attention to maintenance and maintenance.
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