Tech Theory: Technical…Practical… Interesting Automation Industrial Solutions
At DELCO, we understand the importance of customer satisfaction and strive to meet the unique needs of every client. As a reliable valve supplier, we are committed to providing excellent customer service and high-quality products to ensure optimal performance and longevity. By choosing DELCO as your trusted control air supplier, you can benefit from customized valve assemblies designed specifically to meet your requirements, enhancing efficiency and reducing downtime.
Common Faults And Solutions Of Control Valves
Control valves are important components in industrial systems, and their performance directly affects the stable operation of the whole system. However, due to various reasons, control valves may have various failures. In this article, DELCO Valve introduces you to common faults of control valves and their solutions.
What is a control valve
Control valves in the field of industrial automation process control, by accepting the control signal output from the control unit, with the help of power operation to change the medium flow, pressure, temperature, liquid level and other process parameters of the final control element. Generally composed of actuators and valves, can be divided into pneumatic control valves, electric control valves, self-operated control valves.
Common faults of control valves and their solutions
External flushing method
In dealing with easy to precipitate or solid particles in the media, the throttle port of the control valve and the guide is often clogged. Effective way to solve this problem is in the lower part of the valve external flushing gas or steam. In this way, when the valve is clogged or jammed, by opening the external gas or steam valve, you can complete the flushing without operating the valve, restore the normal operation of the valve.
Installing Pipeline Filter Method
For small-diameter control valve, especially the ultra-small flow valve, its throttle gap is very small, the medium can not contain any impurities. In this case, a filter can be installed on the pipeline before the valve to ensure the smooth passage of the medium. In addition, for the regulating valve with a positioner, because the positioner air line throttle port blockage is a common failure, so it is necessary to install an air filtration and pressure reducing valve on the air source pipeline before the positioner.
Cleaning method
Newly commissioned system and the initial period after overhaul, the pipeline welding slag, rust and other impurities are often in the throttle port, guiding parts and the lower bonnet balance hole caused by clogging. In the face of this situation, the valve needs to be disassembled for cleaning to remove impurities. If the sealing surface is damaged, it is also necessary to carry out grinding treatment. At the same time, open the bottom plug flushing impurities in the lower bonnet, and flushing the pipeline.
Straight through to angle method
Straight-through control valve due to its complex flow path design, easy to cause media precipitation, which in turn causes blockage. The straight-through valve is changed to an angle valve is an effective solution. Angle valve design is more in line with fluid dynamics, better scouring performance, smaller dead zone.
Increase the throttle gap method
When solid particles in the medium or piping in the weld slag and rust can not pass through the throttle port and cause blockage, consider using throttle parts with a larger throttle gap, such as open-window or open-type spool and sleeve. These designs are easier to troubleshoot due to their concentrated throttling area rather than uniform distribution. For example, replacing the plunger-shaped spools of single- and double-seated valves with “V”-port spools or sleeve valves can be an effective solution to the clogging problem. A chemical plant’s experience shows that the double-seat valve is changed to a sleeve valve, the common stuck problem has been quickly resolved.
The media flushing method
Media flushing method is to use the medium’s own flushing ability to remove easy to precipitate or easy to block the material, thereby improving the valve’s anti-blocking function. In the implementation of this method, the key is to set the throttle port in the position of the larger scouring force, and to ensure that the throttle material has sufficient corrosion resistance to withstand scouring. This method is particularly suitable for those occasions where the medium itself has a certain kinetic energy, which can effectively remove the blockage and maintain the smooth operation of the valve.
Conclusion
The role of the control valve in the industrial process can not be underestimated, its performance and reliability is critical to the stable operation of the entire system. In the face of common clogging and failure problems, the use of appropriate solutions can effectively maintain the normal operation of the regulating valve to ensure the efficiency and safety of the entire system.
How to get a quick quote for industrial valves?
If you have questions about valves or want to get a quote, please feel free to contact us, we will reply within 6 hours. Phone +86 159 8960 2972, WhatsApp +86 159 8960 2972 or email marketing [email protected].
DELCO’s quality, competitive prices and excellent service make it the best valve partner to help you grow your business. Customize your valves, we have no minimum order.
At DELCO, we understand the importance of customer satisfaction and strive to meet the unique needs of every client. As a reliable control valve supplier, we are committed to providing excellent customer service and high-quality products to ensure optimal performance and longevity. By choosing DELCO as your trusted control valve supplier, you can benefit from customized valve assemblies designed specifically to meet your requirements, enhancing efficiency and reducing downtime.
Furthermore, our competitive pricing on electronic pressure regulators enables you to offer top-notch solutions. As one of the leading control valve manufacturers, we take pride in delivering reliable valves that not only meet industry standards but also contribute to the overall profitability of your business. By partnering with DELCO, you can have peace of mind knowing that you are making a wise choice for the long-term success of your company.
