ASCO Three-way Explosion-proof Solenoid Valve EF8320G17

Product Description:

This 1/4-inch single-coil solenoid valve series generally employs a pilot-operated mechanism. A low-power solenoid coil controls the pilot valve, which leverages the medium's pressure difference to drive the main spool. This configuration enables a small coil to regulate relatively large flow rates, making it ideal for applications requiring frequent switching.

Featuring a single-coil arrangement, the valve operates by energizing or de-energizing the solenoid coil. Upon de-energization, spring force automatically returns the valve to its initial position. This simple and dependable control method suits single-acting actuator applications perfectly.

The valve body includes standardized 1/4-inch NPT or BSP threaded ports, combined with a compact design. Such a structure facilitates installation in environments with limited space and enables easy integration into control panels or pneumatic systems across a variety of automation devices.

Available with bodies made of brass or 316L stainless steel, these valves offer flexibility based on usage requirements. Brass versions provide excellent pressure resistance up to 25 bar and are well-suited for general industrial conditions. Meanwhile, stainless steel variants ensure superior corrosion resistance, fitting challenging environments such as chemical processing, food production, and marine applications.

The valves incorporate a distinctive sealing design that combines a T-shaped seal with a flexible O-ring. This unique approach achieves bubble-tight sealing and robust dirt resistance. Such a sealing system endures millions of cycles, guaranteeing long-term service life and high reliability.

Equipped with low power solenoid coils, some models consume as little as 1.5 to 2.5 watts, significantly reducing energy usage. Various voltage options are offered, including DC24V and AC220V, ensuring compatibility with PLCs and other automated control systems. Protection ratings up to IP65 or IP67 provide dust-tight sealing and water jet resistance, suitable for harsh industrial settings.

The valves deliver rapid response speeds, with opening times not exceeding 15 milliseconds and closing times within 20 milliseconds. Their lifespan surpasses 5 million cycles, and premium models can exceed 100 million cycles, meeting the needs of high-frequency start-stop operational scenarios.

Standard with a manual reset mechanism or operator, these valves allow for easy commissioning, maintenance, and emergency manual control. This feature ensures the valve can be operated without electrical input, enhancing system safety and maintainability.

Supporting both direct inline piping installation and direct mounting on pneumatic actuators via NAMUR standard interfaces, the valves offer versatile installation possibilities. With no orientation restrictions, they can be positioned flexibly to accommodate available space at the installation site.

Applications:

Pneumatic control devices are extensively utilized in automated production lines, including packaging machines, assembly equipment, and material handling systems. They effectively manage single-acting cylinders, pneumatic grippers, and various actuators to perform essential operations such as clamping, positioning, and pushing.

Serving as fundamental control elements within pneumatic setups, these components handle switching and directional operations in air compressor stations, pneumatic tools, and compressors. The standard 1/4-inch port size fits small to medium pneumatic circuits, typically providing flow rates between 700 to 860 liters per minute at 6 bar pressure. This range meets the requirements of most pneumatic actuators used across industries.

In pulse jet dust collection systems, these valves facilitate the rapid release of compressed air necessary for cleaning filters online. Additionally, they play a vital role in valve automation within environmental protection facilities, including wastewater treatment plants and exhaust gas purification systems.

Pneumatic valves find suitable applications in energy-related equipment such as boiler feed valves, gas pipeline safety shut-off mechanisms, and burner control units. Models equipped with ATEX and IEC Ex explosion-proof certifications ensure safe operation within hazardous environments, including petrochemical and propane handling processes.

Certain stainless steel valve models comply with sanitary standards, making them ideal for environments demanding high cleanliness. These include food processing, beverage filling lines, and pharmaceutical manufacturing equipment. To support food-grade media and rigorous cleaning protocols, sealing materials like EPDM or Viton are available.

Pneumatic control devices are widely used in automotive production lines, particularly in welding fixtures, painting apparatus, and assembly stations. Low-power models integrate well with PLC systems, ensuring the reliability and cycle time efficiency required by the automotive industry for controlling tooling and auxiliary equipment.

Valves with certifications such as ATEX, IEC Ex, and UL are specifically designed for explosion-proof operation in flammable environments, making them suitable for petrochemical and gas-related applications.

Some valve models maintain normal functionality at temperatures as low as –60°C, which makes them appropriate for use in cold storage facilities, outdoor conditions, and other low-temperature settings.

High-temperature variants of these valves are capable of handling steam and hot water systems, tolerating media temperatures up to 99°C (210°F).

Valves crafted with stainless steel bodies and corrosion-resistant sealing materials are suitable for controlling mildly acidic, alkaline, and certain corrosive fluids, ensuring durability and reliability in such demanding applications.

Support and Services:

ASCO solenoid valves are designed to provide reliable and efficient control of fluid and gas flow in a wide range of industrial applications. Our technical support team is committed to assisting you with product selection, installation guidance, troubleshooting, and maintenance recommendations to ensure optimal performance of your ASCO solenoid valve.

For installation, it is important to follow the specified guidelines including proper orientation, electrical connections, and pressure ratings to avoid damage and ensure longevity. Regular maintenance such as cleaning and inspection of valve components will help maintain performance and prevent unexpected downtime.

In case of any operational issues, our support team can help diagnose problems related to coil failure, valve sticking, or leakage. We recommend checking electrical supply, coil resistance, and ensuring that the media is compatible with valve materials.

ASCO solenoid valves are backed by comprehensive documentation including datasheets, installation manuals, and troubleshooting guides available for reference. Utilizing genuine ASCO replacement parts and accessories will help maintain product integrity and performance.

Our technical support services also include application assistance to help you select the right valve model based on your specific requirements such as flow rate, pressure, voltage, and environmental conditions.

We strive to provide timely and effective support to maximize the reliability and efficiency of your ASCO solenoid valve installations.

Packing and Shipping:

Each ASCO Solenoid Valve is carefully packaged to ensure it reaches you in perfect condition. The valve is securely placed in a protective casing, accompanied by relevant documentation including the user manual and warranty information. The packaging materials are designed to prevent any damage during transit.

Shipping is handled with utmost care through reliable carriers, offering tracking options for your convenience. We ensure timely delivery and provide support for any shipping inquiries. Whether you order a single valve or bulk quantities, each shipment is processed promptly and packed to maintain product integrity.