ASCO Solenoid Valve NF8551B401MO NF8551B402MO 1/4 Inch Port 3/2 5/2 Way Single Double Coil Pneumatic Air Directional Control Valve Industrial Automation Spare Parts

Product Description:

The ASCO solenoid valve collection presents a wide array of high-performance valves designed to ensure dependable control in various settings such as industrial automation, process control, and hazardous environments. This extensive range comprises 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 systems. These valves incorporate a NAMUR interface and feature a convertible design, enabling a single valve to operate as either a 3/2-way or 5/2-way valve. This flexibility makes them suitable for controlling both single-acting and double-acting actuators. The 551 series, in particular, offers a highly adaptable solution for pneumatic applications.

The 8320 and 320 Series include direct-acting valves, as well as some pilot-operated 3/2-way valves, crafted for a broad range of general-purpose applications. These valves are capable of operating efficiently even without a minimum pressure differential, adding to their versatility.

For liquid, corrosive, and air or inert gas services, the 8210 and 8262 Series provide pilot-operated 2/2-way valves. The 8210 series is recognized for its cost-effective, high-flow performance, while the 8262 series is known as a sturdy and reliable 2/2-way valve option.

The 531 Series offers spool valves with 3/2 or 5/2-way capabilities, often accompanied by intrinsically safe (IS) options to enhance safety in hazardous environments. Similarly, the 210 Series features models like the 8210G094, which are designed for both liquid and gas service applications.

These valves are constructed from a variety of body materials, including black anodized aluminum, brass, and stainless steel (316L). Seal materials such as NBR, PUR, and FKM are available to suit different operational needs. The valves come in configurations of 2/2-way, 3/2-way, and 5/2-way and are offered with single or double solenoid builds to support spring return or bistable functions. Many of the models incorporate NAMUR mounting interfaces and meet IP65, IP66, or IP67 protection standards.

To cater to demanding and hazardous applications, explosion-proof versions are provided with certifications such as ATEX, IECEx, UL, and CSA. Low-power variants are also part of the portfolio, ensuring energy-efficient operation without compromising reliability.

Features:

The 551 and 8551 series spool valves feature NAMUR interface with threaded port connections, allowing for direct mounting of actuators. This design facilitates seamless integration in various applications.

These valves are highly versatile, as the same spool valve can be configured for either 3/2 normally closed (NC) or 5/2 function, accommodating diverse operational needs.

Additionally, all exhaust ports are designed to be connectable, which enhances environmental protection—particularly beneficial in clean room environments.

Safety integrity is ensured with certifications from TÜV for the 551 series and EXIDA for the 551-553 series, supporting SIL 2 with a hardware fault tolerance of 0, and SIL 3 with a fault tolerance of 1.

A standard manual operator is included to simplify commissioning and maintenance tasks.

The 8320 and 320 series direct-acting valves are designed to serve a broad range of general-purpose applications. They stand out for their ability to operate without requiring a minimum pressure differential.

Moreover, these valves offer versatile mounting options, as they can be installed in any orientation according to system requirements.

This series provides economical, high-flow valves suitable for liquids, corrosive substances, and air or inert gas services. Their robust construction, available in either brass or stainless steel bodies, ensures durability across various media types.

The 531 series valves offer flexible functionality, being available as either 3/2-way or 5/2-way configurations.

They are also certified to be intrinsically safe, making them appropriate for use in hazardous areas where current and voltage are limited to ensure safety.

These valve series are offered with bodies made from multiple materials, including aluminum, brass, and stainless steel, catering to diverse application needs.

Multiple voltage options are supported, such as DC 24V, AC 24V, AC 120V, AC 220V, among others, to facilitate compatibility with various systems.

Explosion-proof variants compliant with ATEX and IECEx standards are available for safe operation in hazardous environments.

Low power versions are offered, suitable for remote locations or applications requiring alternative power sources.

High flow rates are a hallmark of these valves, with the 1/4" size models capable of handling up to 700 liters per minute, while the 1/2" size models can reach flow rates as high as 3000 liters per minute.

Technical Parameters:

Applications:

Support and Services:

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

We offer comprehensive services including detailed product documentation, wiring diagrams, and application notes to help you integrate ASCO solenoid valves seamlessly into your systems. Our experts can assist with coil voltage specifications, pressure ratings, and compatibility with various media to match your specific operational requirements.

For maintenance, ASCO solenoid valves are designed for easy servicing with replaceable parts and modular components. Regular inspection and cleaning can extend valve life and maintain reliable operation. We provide guidance on routine maintenance procedures and spare parts availability.

In case of any operational issues, our support team can help diagnose problems related to coil failures, valve sticking, or leakage, and recommend appropriate corrective actions. We also offer training and technical resources to empower your team in handling ASCO solenoid valve systems effectively.

ASCO is committed to quality and customer satisfaction, ensuring our solenoid valves meet rigorous industry standards and deliver consistent performance in demanding environments.

Packing and Shipping:

Each ASCO Solenoid Valve is carefully packaged to ensure protection during transit and handling. The valve is secured in a custom-fitted foam insert within a sturdy cardboard box to prevent any movement or damage.

The packaging includes all necessary documentation such as the product datasheet, installation instructions, and warranty information. Each box is clearly labeled with the product model number, specifications, and handling instructions.

For shipping, ASCO Solenoid Valves are typically dispatched via trusted courier services with tracking options available. Depending on the destination, standard or expedited shipping methods can be selected to meet customer requirements.

Special care is taken to comply with international shipping regulations and to ensure the valves arrive in optimal condition, ready for immediate installation and use.