**1. Switch Form:**
A solenoid valve operated by a coil can only be in an on or off state, with a very short switching time. This makes it ideal for applications where quick response is needed. In contrast, an electric valve is typically driven by a motor and requires more time to open or close. It can also perform analog control, allowing for adjustable operation based on specific requirements.
**2. Nature of Work:**
Solenoid valves generally have a smaller flow coefficient and operate under lower pressure differences. For example, a 25mm solenoid valve has a much lower flow capacity compared to a 15mm electric ball valve. They are powered by electromagnetic coils and are vulnerable to voltage surges. Their main function is simply to open or close, making them suitable for high-frequency switching applications.
Electric valves, on the other hand, are usually driven by motors and are more resistant to electrical fluctuations. They allow for precise control of the opening degree, meaning they can be partially open, fully open, or fully closed. This makes them ideal for regulating fluid flow, which a solenoid valve cannot do effectively. Additionally, solenoid valves can automatically reset when power is lost, while electric valves may require an additional reset mechanism.
**3. Applicable Process:**
Solenoid valves are often used in specialized processes where leakage prevention or handling of unique media is required, although they tend to be more expensive. Electric valves are commonly used for both regulation and switching tasks, such as in fan coil units.
Solenoid valves act as actuators in automated systems and their usage has grown significantly. This article explores the key features of solenoid valves, focusing on domestic development, technological maturity, and trends toward refinement, intelligence, generalization, and specialization. It also briefly discusses social factors that influence the development of solenoid valve technology.
**Main Selection Points for Solenoid Valves:**
1. The main parameters for selecting a solenoid valve include the flow path, nominal pressure, allowable temperature range, and connection size.
2. These valves are typically used for two-position control, with a bore diameter of up to 40mm, and are especially suited for switching gas and liquid lines on and off.
3. Sealing performance is a critical factor in evaluating valve quality. It includes internal leakage (between the seat and closure) and external leakage (from packing, gaskets, or casting defects). Any leakage must be avoided.
4. Key advantages of solenoid valves include compact size, reliable operation, easy maintenance, and cost-effectiveness. When choosing, it's important to select normally open or normally closed based on process needs.
**Installation and Construction Considerations for SMC Solenoid Valves:**
1. The installation position and height of the SMC solenoid valve must comply with port direction design requirements, and all connections should be tight and secure.
2. Before installation, a visual inspection should be conducted. The valve’s nameplate must meet the current national standard GB12220 "General Valve Mark."
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Controller Dimensions : 85×124×600mm
Weight :12 kg
Maximun leaf weight :150 kg
Open range : 70°~115°
Closing speed : 10~43 cm/s
Door hold time :0.5~10 seconds
Main Power :AC 220V~250V,50~60 Hz
Maximum current :1A
Maximun motor power:55W
Wait Power :14W
Fuse :Minimum 3.5 ASlow
Operating Temperature : -30℃ ~+50℃
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