In the pneumatic control valve technology, the air filter, the control valve and the lubricator are assembled together as three air source treatment elements, which are called pneumatic triples, which are used to purify the air source entering the pneumatic surface, filter and decompress it to the surface to supply additional The air source pressure is equivalent to the function of the power transformer in the circuit. The valve limit switch is an on-site surface for detecting valve status in the control system. It is used to output the opening or closing position of the pneumatic control valve as a switch value (contact) signal, which is accepted by the program controller or the computer searches for sampling and confirms. Then proceed to the next procedure.
This product can also be used as an important valve interlocking protection and remote alarm indication in the system. The air filter pressure reducer is small in size and convenient in installation. Therefore, it is installed with pneumatic transmitters, pneumatic regulators, valve positioners and other products. Use together. If the air filter and the regulating valve are planned as a whole, they become two parts. Proper air pressure control will definitely make the effect as expected. The air pressure control system is the core of the air pressure control valve. There are a series of problems in this aspect. The air pressure control requirements cannot reach the expected specifications, and the power of valve replacement is relatively low, which will fundamentally affect Water flow manipulation. Before carrying out air pressure regulation, it is necessary to have a comprehensive understanding of the acuteness of the waters. If it is relatively stable, the low-pressure control concept should be used at this moment, and the water flow is relatively turbulent, the high-pressure control concept should be used. When the water flow is changed, the air pressure needs to be changed in time to fundamentally achieve the expected working effect. After the above description, I believe that everyone has a more comprehensive understanding of the importance of pneumatic control valve enterprise control. This kind of system will definitely be upgraded in all aspects in the future, and it will have stronger advantages after the system is perfected.
Common leakage problems of pneumatic control valves, valve leakage, due to improper stem length and too long valve stem length, the valve stem is too short up and down, resulting in incomplete contact between the valve core and the valve seat gap, resulting in valve leakage. Pneumatic Control Valve Packing Leakage Pneumatic control valve installs the packing into the stuffing box, which will exert axial pressure on the control valve. Due to the plastic deformation of the packing, radial pressure occurs and the stem touches tightly, but not evenly. During operation of the pneumatic control valve, the stem and package will move axially. In the high temperature and high pressure environment, due to the high permeability, it is easy to leak. The valve core and valve seat of the pneumatic control valve are deformed and leak the erosion and impact of the pneumatic control valve, causing it to deform. As time goes by, the valve core and the valve seat will not match. leak. If your pneumatic control valve is leaking, it is necessary to eliminate the above problems first, and prescribe the right medicine.
