Product Description:
The ASCO solenoid valve portfolio offers a broad selection of high-performance valves that are expertly engineered to provide reliable control in various sectors, including industrial automation, process control, and hazardous area environments. This extensive range incorporates multiple series, each tailored to meet the specific requirements of diverse applications.
The 551 and 8551 Series consist of pilot-operated spool valves that are perfect for pneumatic control tasks. These valves come equipped with a NAMUR interface and a versatile design that permits a single valve to be configured as either a 3/2-way or 5/2-way valve. This flexibility makes them well suited for controlling both single-acting and double-acting actuators. In particular, the 551 series provides a highly adaptable platform for pneumatic system integration.
The 8320 and 320 Series include direct-acting and some pilot-operated 3/2-way valves crafted for a wide array of general service applications. A notable feature of these valves is their ability to operate effectively without requiring a minimum pressure differential, enhancing their usability in various settings.
For liquid, corrosive, and air or inert gas services, the 8210 and 8262 Series deliver robust pilot-operated 2/2-way valve solutions. The 210/8210 series is recognized for offering economical options with high flow capacity, while the 8262 series stands out as a durable and reliable 2/2-way valve choice.
The 531 Series is a spool valve line capable of functioning as 3/2 or 5/2 valves and often includes intrinsically safe (IS) variants for enhanced safety in hazardous environments. Additionally, the 210 Series, featuring models such as the 8210G094, is designed to handle both liquid and gas service applications efficiently.
These valves are available in multiple body materials, including black anodized aluminum, brass, and stainless steel (316L). They also offer a variety of seal options such as NBR, PUR, and FKM. The portfolio includes valves configured as 2/2-way, 3/2-way, and 5/2-way, with both single and double solenoid designs to support spring return or bistable operations. Many models feature NAMUR mounting interfaces and provide protection ratings of IP65, IP66, or IP67.
For challenging and hazardous applications, explosion-proof versions are available with certifications such as ATEX, IECEx, UL, and CSA. The portfolio also includes low-power variants, ensuring that ASCO valves meet the rigorous demands of safety and energy efficiency in complex industrial environments.
Features:
551 / 8551 Series (Spool Valves)
These spool valves feature a NAMUR interface with threaded port connections, allowing for direct mounting on actuators. Their design ensures versatility, as the same valve can be configured for either 3/2 normally closed (NC) or 5/2 functions.
The exhaust ports on these valves are all pipable, which means they can be connected to enhance environmental protection — a critical factor in clean room applications. Additionally, the 551 series holds TÜV certification, while the 551-553 series complies with EXIDA standards, meeting safety integrity levels SIL 2 (with HFT=0) and SIL 3 (with HFT=1).
For ease of use during commissioning and maintenance, these valves are equipped with a standard manual operator.
8320 / 320 Series (Direct-Acting)
The 8320 and 320 series valves are engineered to suit a broad range of general-service applications. One significant advantage of these direct-acting valves is that they operate efficiently without requiring a minimum pressure differential.
Their flexible design also allows them to be installed in any position, accommodating various system layouts without restrictions.
8210 / 8262 Series (General Service)
Offering high flow rates, the 8210 and 8262 series are economical options tailored for services involving liquids, corrosive substances, and air or inert gases. These valves boast robust construction with options for brass or stainless steel bodies to suit different media requirements.
531 Series
The 531 series provides flexible functionality, available in both 3/2-way and 5/2-way configurations. They are intrinsically safe and certified for use in hazardous areas that require limited current and voltage, ensuring reliable operation under stringent safety standards.
Common Features Across All Series
Across all the valve series, bodies are offered in multiple materials including aluminum, brass, and stainless steel to meet various application needs. Electrically, these valves support multiple voltage options such as DC 24V, AC 24V, AC 120V, and AC 220V, among others.
For use in hazardous environments, explosion-proof variants compliant with ATEX and IECEx standards are available. Additionally, low power consumption models are offered for applications requiring remote or alternative power sources.
In terms of performance, valves fitted with 1/4" ports can typically achieve flow rates around 700 liters per minute, while 1/2" port models can reach up to 3000 liters per minute, accommodating a wide range of flow demands.
Technical Parameters:
| Port Sizes |
1/4" To 1" |
| Temperature Range |
-60°C To +125°F |
| Operating Pressure |
Up To 250 PSI |
| Valve Type |
Solenoid Operated, Pilot-operated, Direct-acting |
| Seal Materials |
NBR, PUR, FKM, PTFE |
| Body Materials |
Aluminum, Brass, Stainless Steel |
| Protection Class |
IP65, IP66, IP67 |
| Function |
2/2 NC, 3/2~5/2, 2/2 NO |
Applications:
Pneumatic Actuator Control Applications
Pneumatic actuator control is often implemented through direct NAMUR mounting on quarter-turn actuators, offering a reliable and standardized method for valve operation in various industrial settings.
In the field of industrial automation, pneumatic control systems serve as general-purpose solutions for manufacturing and process automation tasks, ensuring efficient and precise control of mechanical movements.
Process control applications benefit significantly from these systems, especially in chemical, petrochemical, and hybrid industries where valve actuation and fluid management are critical to maintaining operational safety and efficiency.
For hazardous environments, explosion-proof and intrinsically safe versions of pneumatic controls are available, suitable for use in Zone 1, 2, 21, and 22 classifications to ensure safe operation amidst volatile conditions.
Water and wastewater treatment plants utilize pneumatic control for managing water flow and the dosing of treatment chemicals, providing reliable operation in complex treatment processes.
In pharmaceutical and food processing industries, pneumatic actuators are designed with environmentally protected constructions to meet the stringent requirements of clean room applications, ensuring hygiene and product safety.
The oil and gas sector employs pneumatic control systems to regulate the flow of liquid petroleum gases and various fluids, facilitating safe and efficient extraction and processing operations.
Packaging machinery relies on pneumatic controls to handle automation tasks related to packaging and material handling equipment, improving speed and accuracy in production lines.
Remote and alternative power locations benefit from low-power pneumatic constructions, which are suitable for solar, battery-powered, and other remote installations where energy efficiency is paramount.
Finally, analytical and diagnostic equipment utilize precision fluid control through pneumatic actuators to ensure accurate and sensitive measurements essential for laboratory and medical applications.
Support and Services:
ASCO solenoid valves are engineered to provide reliable and efficient fluid control across a wide range of industrial applications. Our technical support team is dedicated to helping you select, install, and maintain ASCO solenoid valves to ensure optimal performance and longevity.
For product selection assistance, our experts can guide you through the various models, materials, and specifications to meet your unique application requirements. We offer detailed product documentation, including datasheets, wiring diagrams, and installation manuals to support proper setup and operation.
Installation support includes guidance on correct mounting, electrical connections, and environmental considerations to avoid common issues such as coil burnout or valve leakage. We recommend following all safety guidelines and industry standards during installation and maintenance.
Maintenance services cover troubleshooting common problems, routine inspection procedures, and replacement parts identification. ASCO solenoid valves are designed for easy servicing, and our team can provide step-by-step support to minimize downtime and extend product life.
Additionally, ASCO provides training resources and technical bulletins to keep users informed about the latest product updates, application tips, and best practices. Our commitment is to deliver comprehensive support throughout the product lifecycle to maximize your operational efficiency.
Packing and Shipping:
The ASCO Solenoid Valve is carefully packaged to ensure maximum protection during transit. Each valve is individually packed in a sturdy, cushioned box designed to prevent damage from shocks and vibrations. The packaging materials are selected to maintain the integrity and cleanliness of the valve, preventing contamination and corrosion.
For shipping, ASCO Solenoid Valves are securely placed in outer cartons that are labeled with handling instructions and product information. Depending on the order size and destination, shipments may be dispatched via air, sea, or ground transportation. All packages comply with international shipping standards to guarantee safe and timely delivery.
Additionally, tracking information is provided once the product has been shipped, allowing customers to monitor their order status until it reaches its destination. If special shipping requirements are needed, such as expedited delivery or hazardous material handling, these can be arranged upon request.
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