Solenoid valves have become widely used across various industries, yet their application scenarios vary significantly. To enhance universal performance and reduce costs related to manufacturing, purchasing, storage, installation, and maintenance, the industry has made significant progress in recent years.
One key development is the adjustable response time, which refers to the time it takes for the valve core to act after receiving an electrical signal. Different applications require different switching speeds, such as fast-opening and fast-closing for rapid response systems, or fast-opening and slow-closing to prevent water hammer. ZDF multi-function solenoid valves can be adjusted to any state, offering great flexibility in use.
Another advancement is the expansion of media compatibility. Traditional solenoid valves are limited in the types of media they can handle, such as air, water, steam, and oil, each requiring specific structural parameters. However, the ZDF multi-function solenoid valve uses a simple design with a small screw, enabling it to handle gas, water, and oil, while also expanding the range of oil viscosities it can manage.
Additionally, many solenoid valves now include manual override functions for backup during power outages or failures. While traditional manual devices only allow full opening or closing, the ZDF model allows presetting of valve positions, offering greater control and versatility.
In terms of specialization, the demand for various types of solenoid valves has surged. For example, gas solenoid valves have seen increased demand due to the shift toward natural gas usage in China. These valves must withstand varying pressures, from as low as 2 kPa to as high as 25 MPa, and handle impurities and corrosion. The CE series gas solenoid valves produced by the company are already exported to the EU.
Steam solenoid valves face challenges related to high temperature, sealing materials, and condensation in pipelines. The ZQDF-3-type valve has been recognized as a state-level new product and is widely used in industrial settings. Water solenoid valves, though often considered simple, must be tailored for different water types—such as tap water, seawater, and wastewater—each with unique corrosion and cleanliness requirements. Fire protection systems, for instance, demand highly reliable valves to prevent catastrophic failures.
Oil solenoid valves require specialized seal technology, as different oils have varying levels of impurities and viscosity. High-viscosity oil often operates at elevated temperatures, necessitating additional heat-resistant designs. The company has developed solenoid valves for gasoline, diesel, and heavy oil, meeting diverse industry needs.
Air conditioning solenoid valves have also evolved, especially with the shift from traditional refrigerants like ammonia and freon to lithium bromide. These valves must ensure proper sealing, corrosion resistance, and longevity. Simple, cost-effective solenoid valves remain the preferred choice in many cases, despite the presence of more complex alternatives.
Technological progress in solenoid valves is closely tied to social and economic development. In the past, there was a strong tendency to favor foreign products, but domestic confidence has grown significantly. Projects such as the Mao Memorial Hall’s air-conditioning system have demonstrated the quality and reliability of Chinese-made valves. Additionally, international recognition, including recommendations from European authorities, further validates the industry's growth.
However, unfair competition remains a challenge, with counterfeit products and fake certifications still prevalent. Fortunately, awareness of legal compliance is increasing, with more companies adhering to ISO 9000 standards and seeking certified suppliers. Designers and procurement teams are becoming more discerning, engaging directly with manufacturers and conducting thorough evaluations of technical capabilities and user experiences.
Overall, the solenoid valve industry in China has made remarkable strides, combining learning from foreign technologies with continuous innovation. As the legal framework strengthens and public awareness improves, the future of solenoid valve technology looks promising, driven by both technical excellence and societal progress.
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Shenyang North Heavy Metallurgical Engineering Technology Co., Ltd. , https://www.nhmetallurgy.com