news -The use of self-operated pressure regulator

Self-reliance pressure regulator valve drives by the energy of medium itself, not required other energy like electric power or pneumatic source, so it is energy-saving and environmentally friendly. It is so easy to use that it can be put on running after installation and the pressure has been set. Thus it has been widely used under the situation which doesn't need high control accuracy requirement and lack of electric power or pneumatic source.
However, the valve also need correct selection, correct installation and use, to ensure there is not any problem appeared after operation. Selection is not need much to said, such as regulator valve is used for controlling upstream pressure or downstream pressure, medium is normal pressure or high temperature, has causticity or not, the highest working pressure, etc. must be clear. Here we mainly talk about something about installation and using, because recently I met a problem of the using of self-reliance pressure regulator valve, which is representative.
The valve is used in steam pipe, the user reports after using only just one or two months. In attendance, I find numerous steams exhause from air vent of the head, and the noise is so big. Apparently, the cause of the accident is that the steam goes into the head directly without condensation, so it burns the diaphragm.
Used in steam pipe, the self-reliance pressure regulator valve must add a drainer been the actuator and pipe when installation. It cannot let steam enter the actuator head, when installation, the regulator must be upside down, and the drainer should higher than head. The drainer and head must be filled with water when it used for the first time. There is no problems after looking at the site and asking the installation person, so what is the reason? It is a head-scratching puzzlement. Later, I get to know it after asking an operator carefully. The copper pipe joint between drainer and head has been leaked continuously after this valve is installed and put into use. Originally, it is the leakage causes the water in the drainer dry slowly, then the steam enters the head which burns the diaphragm.
Thus, it must pay attention to self-reliance pressure regulator valve when it is used in steam pipe, installation and maintenance. To ensure it operated normally, it cannot make joint leaking and let drainer dry, it need regular check and add the water timely. Actually, not only self-reliance pressure regulator valve but also other self-reliance type regulator should note the maintenance when using.
In addition, if the steam pressure is high, it would better choose the piston actuators, not the diaphragm type. Because the pressure that the diaphragm can bear not exceed 0.4 Mpa, although it can use, the using life will greatly reduce.