Solenoid valves, as key actuators in automated metering systems, have experienced significant growth in recent years. This paper explores the core characteristics of solenoid valves and highlights the application of mature domestic technologies, focusing on their development in areas such as streamlining, intelligence, generalization, and specialization. Additionally, it discusses the social factors influencing the advancement of electromagnetic valve technology.
Keywords: electromagnetic valve, intelligent generalization, multi-function, self-maintaining combination valve, main features of solenoid valve
(1) External leakage is effectively blocked, internal leakage is easily controlled, and usage is safe.
Leakage, both internal and external, is a critical factor in ensuring safety. Unlike other self-controlled valves that rely on extended valve stems and actuators (electric, pneumatic, or hydraulic), which often face challenges with dynamic seals, solenoid valves use electromagnetic force to move an iron core within a magnetic isolation sleeve, eliminating the need for dynamic seals and thus reducing external leakage. Electric valves, on the other hand, are more difficult to control in terms of torque, leading to potential internal leakage or even stem breakage. Solenoid valves, due to their structural design, can effectively minimize internal leakage, even bringing it close to zero. This makes them particularly safe, especially when handling corrosive, toxic, or high-temperature media.
(2) The system is simple, easy to connect with computers, and cost-effective.
Solenoid valves are not only simple in structure and low in cost but also easier to install and maintain compared to other types of actuators like control valves. More importantly, the self-control system they integrate into is much simpler and more affordable. Since solenoid valves operate using switching signals, they are highly compatible with industrial computers. With the widespread adoption of computers and the decreasing costs, the advantages of solenoid valves have become even more prominent.
(3) Fast response, low power consumption, and compact design.
Solenoid valves can respond in just a few milliseconds, and pilot valves can be controlled within tens of milliseconds. Their self-contained loop design makes them more sensitive than other self-controlled valves. Well-designed coil structures ensure low power consumption, making them energy-efficient. They can trigger actions and maintain valve positions without consuming electricity. Additionally, their small size saves space and enhances aesthetics.
(4) Limited adjustment accuracy and medium compatibility.
Solenoid valves typically operate in two states—on or off—and the valve core can only be in two extreme positions, limiting continuous adjustment. Although there are many new ideas emerging to overcome this limitation, most remain in experimental stages. Furthermore, solenoid valves require clean media. Particulate matter cannot be used without prior filtration, and viscous media are generally unsuitable. The viscosity range for specific products is relatively narrow.
(5) Diverse models and broad applications.
Despite inherent limitations, solenoid valves possess strong advantages, leading to the development of a wide range of models to meet various needs. Their versatility is unmatched. Technological advancements in solenoid valves are primarily focused on overcoming their shortcomings while enhancing their existing strengths.
2.1 Development in the direction of simplification
At the core of any successful design lies simplicity. Only through simplicity can a product endure and be widely adopted over time.
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