When selecting a solenoid valve, safety should be the top priority. Ignoring safety can lead to serious consequences, especially in environments where corrosive or explosive media are involved. **1. Safety Considerations** - **Corrosive Media**: For corrosive substances, it's essential to use plastic or all-stainless steel solenoid valves. In cases of strong corrosion, an isolation diaphragm must be used. For example, models like CD-F.Z3CF are suitable. Neutral media can use copper alloys, but this is not advisable if the valve isn't operated frequently, as rust may occur. However, ammonia valves must never use copper. - **Explosive Environments**: In such conditions, only explosion-proof products should be used. For outdoor or dusty areas, waterproof and dustproof types are recommended. - **Pressure Rating**: The nominal pressure of the solenoid valve must exceed the maximum working pressure of the system to avoid failure. **2. Applicability** Solenoid valves should be chosen based on their suitability for the application, not just cost. Proper selection avoids future problems. - **Media Characteristics**: - Gas, liquid, or mixed media require different valve types. For instance, ZQDF is suitable for air, ZQDF-Y for liquids, and ZQDF-2 (or -3) for steam. - Temperature variations can affect coil performance and seal longevity. Ensure the operating temperature stays within the valve’s limits. - Viscosity matters—media with viscosity above 50cSt may require special valves like ZDF series for larger diameters, or high-viscosity models for smaller ones. - Cleanliness is important; install a filter before the valve if the media is dirty. Direct-acting diaphragm valves like CD-P are ideal for low-pressure applications. - Directional media that cannot flow backward require bidirectional valves such as ZDF-N or ZQDF-N. - **Pipeline Parameters**: - Choose the right port size and model based on flow requirements and pipe connections. For example, CA5 or Z3F for small diameters, and ZDF-Z1/2 for medium or large sizes. - Select the nominal diameter based on flow rate and Kv value. Be cautious of manufacturers who do not specify Kv values, as internal valve orifice sizes may be smaller than the interface. - Minimum pressure differential affects valve type: indirect pilot valves are suitable for above 0.04MPa, while direct or step-by-step direct types are needed for lower pressures. - **Environmental Conditions**: - Operating temperatures must be within the valve’s range. Special orders are required for extreme conditions. - High humidity or wet environments call for waterproof valves. - Vibrations, impacts, or harsh environments may require specialized valves, such as marine-grade models. - In corrosive or explosive settings, prioritize corrosion-resistant and explosion-proof options. - Space constraints make multi-function valves ideal, as they eliminate the need for bypasses and manual valves, simplifying maintenance. **3. Power Conditions** - **Power Supply Type**: Choose AC or DC valves depending on the available power source. AC is typically more convenient. - **Voltage Specifications**: Prefer AC220V or DC24V. Voltage fluctuations should be within ±10% for AC and ±10% for DC. Severe fluctuations may require voltage stabilization or custom orders. - **Power Capacity**: Match the valve’s rated current and power consumption to the system’s capacity. Indirect-acting valves are better for systems with limited power. **4. Control Accuracy** - **Precision Requirements**: Standard valves only have on/off functions. For precise control, multi-position valves like Z3CF (three positions: micro-open, fully open, closed) or ZDF-Z1/1 (four flow states: full open, large open, small open, full open) are necessary. - **Response Time**: The time it takes for the valve to act after receiving a signal is critical. Only patented multi-function valves allow independent adjustment of opening and closing times, reducing water hammer damage. - **Leakage**: Standard leakage values are acceptable for most applications. If higher precision is needed, special orders should be made. **5. Reliability** A reliable solenoid valve is crucial for system integrity. - **Working Life**: This is usually tested during type testing, not factory testing. Choose reputable brands to ensure quality. - **Work Standards**: Long-term, short-term, or intermittent operation modes affect valve selection. Conventional valves are designed for long-term use. For long-on, short-off scenarios, normally open valves are preferable. Short-term operations may require special orders to reduce energy use. - **Operating Frequency**: High-frequency applications benefit from direct-acting valves, and AC power is generally preferred. - **Operational Reliability**: While not yet standardized, reliability is key. In critical applications like fire protection or emergency systems, dual redundancy is essential. **6. Economy** Economy is important, but it should not compromise safety, applicability, or reliability. A cheap valve that fails early can cause much greater losses. - **Cost-Effectiveness**: The total cost includes not only the product price but also installation, maintenance, and long-term performance. A high-quality, reliable valve may offer better value over time. - **System Integration**: The solenoid valve should represent a minimal portion of the overall system cost. Always consider its role in the entire automation setup. In summary, choosing a solenoid valve involves careful consideration of safety, applicability, reliability, and economic factors. A well-chosen valve ensures smooth operation, reduces downtime, and protects the entire system from potential failures.

Two-component Silicone Adhesive Glue

potting compound for electronics,clear silicone waterproof sealant,silicone based glue,water proof glue,glueing silicone

Dongguan Shuangzhan Industrial Co.,Ltd , https://www.lingwogroup.com