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This post was last edited by diateng on 2022-9-14 at 12:56: https://cbu01.alicdn.com/img/ibank/O1CN01CAHlqv1uRcWzcmkYW_!!934146034-0-cib.jpg?__r__=1617247968834. A negative pressure solenoid valve is essentially a vacuum solenoid valve; in fact, both types of solenoid valves require a leakage rate of zero； Only in this way can vacuum extraction and negative pressure operation be ensured. Therefore, for a negative pressure solenoid valve, it is essential that its leakage rate be zero. How is the leakage rate of such a solenoid valve determined? It is based on the negative pressure value of the valve Normally, negative pressure solenoid valves require a very low leakage rate; they are also known as zero-leakage solenoid valves, negative pressure solenoid valves, or vacuum solenoid valves. There are also micro-high-frequency solenoid valves and high-frequency solenoid valves, with a maximum frequency of 100 Hz or 200 Hz ； High-frequency solenoid valves can be used for pressure compensation, as well as as regular solenoid valves to regulate flow and compensate for pressure. High-frequency solenoid valves are cheaper than regular ones and yet reliable. Our leak-free solenoid valves are designed specifically for analytical instruments, environmental testing equipment, biochemical instruments, and custom leak detection devices; they operate in a pressure range of vacuum to 15,000 PSI (104 MPa), with diameters ranging from 0.5 mm to 50 mm, and are suitable for a wide range of power supply applications. Step valves and servo valves generally have low pressure, slow response speeds, and lower precision compared to high-speed solenoid valves. Servo valves are more expensive than our fast-response solenoid valves, and their maintenance is more complex. Our high-pressure, fast-response, zero-leakage solenoid valves have only 3 moving parts, making maintenance simple; they are also cheaper than step valves and servo valves, making them the best alternative. In the future, solenoid valves will find use in more applications, which represents an upgrade in product performance and energy efficiency. High-frequency solenoid valves, zero-leakage solenoid valves, and high-pressure solenoid valves – High-frequency solenoid valves are suitable for use in pressure regulators and flow regulators. The zero-leakage, high-frequency solenoid valves produced by Shenzhen Deteng Electromechanical Equipment Co., Ltd. can be used as pressure regulators and flow regulators. Since these are high-frequency solenoid valves, they have a lower leakage rate compared to other proportional valves, step valves, and servo valves, and they also respond more quickly. Therefore, our zero-leakage high-frequency solenoid valves are ideal for use in pressure compensation, flow compensation, as well as in pressure regulators and flow regulators. Moreover, our valves can operate at high pressures, up to 103 MPa or 70 MPa. When using our zero-leakage high-pressure solenoid valves for pressure or flow regulation, we provide technical solutions and offer excellent customer service. These are high-pressure solenoid valves that can be used with both gases and liquids. 70MPa solenoid valve, direct-acting high-pressure solenoid valve, zero-leakage solenoid valve. If you need solenoid valves, just contact Shenzhen Diateng Electromechanical Equipment Co., Ltd.; we can provide solenoid valves to meet all your requirements. www.diateng.com