Smc solenoid valve driven by the coil can only open or close. Short switching time.
Electric valves are usually driven by motors. Turning on or off the motor requires a certain amount of time for analog measurements and adjustments can be made.
Nature of the work:
The solenoid valve generally has a small flow coefficient and a small working pressure difference. For example, a typical No. 25 solenoid valve has a much smaller flow coefficient than No. 15 electric ball valve. Solenoid valves are driven by solenoid valves and are easily damaged by voltage surges. The equivalent of a switch is to open and close two roles.
Electric valves are usually driven by motors and are relatively resistant to voltage surges. The solenoid valve is quick opening and quick closing. They are usually used for small flows and small pressures, switching frequencies are large, and the electric valves are the opposite. The opening degree of the electric valve can be controlled, and it can be opened, closed, half-opened and half-closed, and the flow of the medium in the pipeline can be controlled. The electromagnetic valve cannot satisfy this requirement.
When the power is off, the solenoid valve can be reset. Electric valves require such a function to add a reset device.
Solenoid valves are suitable for special technical requirements, such as leaks, special fluid media, etc. These are relatively expensive.
Electric valve is generally used for regulation, but also the amount of switching, such as: fan coil end.
Solenoid valves act as actuators for automated meters and their usage increases dramatically. This article analyzes the main characteristics of the solenoid valve, focusing on the application of mature technology from the perspective of the domestic development of the refinement, intelligence, generalization, specialization, a brief summary of the direction, and a slight impact on the development of the solenoid valve technology discussion society factor.
The first is the product selection point
1. The main control parameters of the solenoid valve are the path, design nominal pressure, medium allowable temperature range and interface size.
2. The solenoid valve is used to open and close the valve through the solenoid. It is commonly used for two-position control with a diameter of 40mm or less, especially for connecting, cutting or replacing gas and liquid lines.
3. The sealing performance of the valve is one of the main indicators for evaluating valve quality. The valve sealing performance mainly includes two aspects, inner leakage and outer leakage. Endoleak refers to the degree of sealing of the media between the seat and the cover. Outer leakage refers to the leakage of the valve stem packing, leakage of the middle port gasket, and leakage of the valve body due to casting defects. Leakage is not allowed.
4, The main advantages of solenoid valve are small size, reliable operation, convenient maintenance and low price. When choosing, pay attention to choose normally open or normally closed according to process requirements.