**Key Considerations When Selecting a Solenoid Valve**
When choosing a solenoid valve, it is essential to ensure that the fluid in your piping system matches the medium for which the valve was calibrated. This ensures proper performance and longevity. Additionally, the temperature of the fluid should not exceed the rated temperature of the selected solenoid valve. Most solenoid valves are designed to handle liquids with a viscosity of up to 20 CST, but if the viscosity exceeds this, special attention should be given to the valve’s compatibility and potential limitations.
The working pressure difference is another critical factor. For systems where the maximum pressure difference in the pipeline is below 0.04MPa, direct-acting or step-by-step direct-acting solenoid valves (such as ZS, 2W, ZQDF, ZCM series) are suitable. However, if the minimum operating pressure difference is above 0.04MPa, a pilot-operated solenoid valve may be more appropriate. Always make sure that the maximum working pressure difference does not exceed the valve’s maximum rated pressure. Most solenoid valves operate in one direction, so you must check for any backpressure and consider installing a check valve if necessary.
If the fluid in your system is not very clean, it's recommended to install a filter before the solenoid valve to prevent clogging and damage. These valves typically require clean media for optimal function. Pay attention to the flow area and nozzle diameter when selecting the right model. Solenoid valves are generally two-position switches, so it’s wise to plan for a bypass line during installation for easier maintenance. In cases where water hammer is present, custom adjustments to the opening and closing time of the valve may be necessary. Also, be aware of how ambient temperature can affect the valve’s performance and lifespan.
When it comes to power requirements, select the appropriate current and power consumption based on the valve’s output capacity. The supply voltage is usually allowed to vary by ±10%, but keep in mind that the VA value (volt-amps) is higher during AC startup. This can impact the overall electrical load and should be considered during system design.
Solenoid valves come in two main reliability types: normally closed and normally open. Normally closed valves are most commonly used, as they remain closed when power is off and open when energized. However, if the valve needs to stay open for extended periods, a normally open type might be more suitable. For high-frequency operation, direct-acting models are often preferred, especially for larger diameters where fast response times are required. Finally, note that while factory testing is standard, there is currently no official Chinese industry standard for solenoid valves, so careful selection of manufacturers is crucial for long-term reliability.
Threaded rods, also known as tooth bar, Screw, full thread stud, etc., has no head, and is a fastener with full thread on the threaded post and guide angle at both ends. It is generally used as the connection between thicker parts and is mostly used for fastening in the mechanical industry.
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