ASCO EF8551A001MS DC24/DCD Emerson NPT 1/4 Solenoid Valve

Product Description:

The ASCO 551, 553, and 531 series represent compact spool-type solenoid valves designed for different industrial applications. While they share a common basic design, they differ in specific parameters such as port sizes and flow capacities, tailoring them to distinct usage scenarios. These valves are widely deployed for gas control across sectors including chemical engineering, food processing, and beverage manufacturing.

Below is an in-depth overview of each series and their unique attributes:

Commonly known as the 8551 Series, this valve is a 1/4-inch 3-way and 4-way spool valve optimized for controlling air and inert gases in challenging environments. It is engineered to withstand hazardous and corrosive conditions frequently encountered in industrial settings.

• Key Parameters: The operating pressure ranges from vacuum up to 150 psi, while the medium temperature spans -60℃ to 80℃. Its flow rate ranges from 0.5 to 1.0 Cv (0.43 to 0.86 Kv). The valve supports multiple voltage options including DC voltages like 6VDC, 12VDC, 24VDC, and AC voltages such as 24VAC, 110VAC, and 220VAC, accommodating various power supply environments.
• Structure & Materials: The valve body is available in anodized aluminum, brass, and optional stainless steel. Port types include G ISO228/1 - G BSPP and NPTF, with connections via 1/4-inch NPT or BSP threads. The series offers multiple function modes such as 3/2 Normally Closed (NC), 4/2, 4/3 Center Closed (CC), and 4/3 Normally Open (NO). Both single-coil and double-coil configurations are supported, and installation can be done in any orientation.
• Main Advantages & Applications: Featuring a hybrid sealing design combining hard T-seals with flexible O-rings, these valves ensure excellent sealing and resistance to particulate contamination, allowing stable operation over millions of cycles. Certifications such as ATEX, UL, and CSA attest to their explosion-proof quality. They are especially suitable for chemical processing, oil refining, food and beverage industries, and life science applications.

Known also as the 8553 Series, this model features a larger 1/2-inch port size and higher flow capacity compared to the 551 Series. Like its counterpart, it is primarily used for air and inert gas control.

• Key Parameters: It operates from vacuum up to 150 psi, with an enhanced flow range of 2.0 to 6.0 Cv (1.73 to 5.19 Kv), providing superior flow performance. Voltage configurations align with the 551 Series, ensuring compatibility across different supply scenarios. The valve meets an IP65 protection rating and supports functional safety loops up to SIL3, guaranteeing high safety standards.
• Structure & Materials: The valve body can be constructed from aluminum, brass, or 316L stainless steel. Port types include G ISO228/1 - G BSPP and NPTF, with connections using 1/2-inch NPT or BSP threads. Installation options comprise mounting on actuators with NAMUR interfaces following the VDI/VDE3845 standard or direct pipe mounting via threaded connections.
• Main Advantages & Applications: The exhaust port is pipeable, and NAMUR ports are positioned on the same side, enhancing protection against dust and water ingress. The valve combines waterproof and explosion-proof features with a low power design ideal for remote power supply environments. It finds common use in demanding industrial scenarios requiring high flow rates, such as chemical engineering and refining operations.

The 531 Series centers on safety and dependability, offering both explosion-proof and non-explosion-proof variants. Its primary role is actuator pilot control in chemical and hybrid industries, with notable models including SCG531C001MS.

• Key Parameters: Operating pressure ranges from -0.95 bar to +10 bar, with an ambient temperature tolerance from -10℃ to +60℃. At 6 bar, the valve delivers a flow rate of 1150 L/min (ANR). Interface size is G1/4 with a 6mm port diameter and a flow coefficient of 0.95 m³/h. Common voltages are 220VAC and 24VDC. Coil power consumption features an inrush power of 6 VA and a holding power of 3.5 VA.
• Structure & Materials: It features a black anodized aluminum body, low-friction non-sticking T-seals for optimal sealing, and polyamide top covers and end caps. Internal parts are made from acetal and aluminum. Electrical connections are available in DIN or metal M12 types, with installation via NAMUR standards. The exhaust port uses a threaded interface to reduce impurity ingress.
• Main Advantages & Applications: An internal air circulation design helps prevent moisture entry into the actuator and valve body, minimizing corrosion risk. This series conforms to EN60730 safety standards and holds explosion-proof certifications such as ATEX and IECEx. Its cleanliness and reliability make it well suited for industries with stringent environmental cleanliness demands, such as pharmaceutical and food processing sectors, alongside its use in actuator pilot control within the chemical industry.

Technical Parameters:

Applications:

The ASCO Solenoid Valve is a highly versatile and reliable component widely used in various industrial and commercial applications. As a 2-way solenoid spool valve with a robust aluminium body, it is designed to operate efficiently under a nominal pressure of up to 400 Bar and within a temperature range of -60°C to 80°C. This makes it ideal for controlling the flow of liquids and gases in demanding environments.

One of the primary application occasions for the ASCO solenoid valve is in automated fluid control systems where precise regulation is critical. Industries such as chemical processing, water treatment, and HVAC systems frequently utilize this electron magnetic valve due to its fast response time and dependable performance. Its plate type connection method allows for easy installation and integration into existing systems, enhancing operational efficiency.

In manufacturing plants, the ASCO solenoid spool valve is often employed to manage pneumatic and hydraulic circuits, ensuring smooth operation of machinery and safety mechanisms. Its CE certification guarantees compliance with international safety and quality standards, making it a trusted choice for engineers and system designers. Additionally, the valve’s adaptability to different packaging requirements, including carton packaging or customized solutions as per client demand, facilitates seamless supply chain management.

The ASCO solenoid valve is also popular in automotive and aerospace sectors where precision and durability are paramount. Its ability to function reliably under extreme temperatures and high pressures makes it suitable for controlling fuel systems, cooling circuits, and other critical fluid pathways. Furthermore, with a supply ability of 5000 pieces per month and a minimum order quantity of just one unit, customers can easily procure this valve for both large-scale projects and smaller maintenance needs.

Customers benefit from flexible payment terms including T/T, Western Union, and Paypal, and can expect prompt delivery within 1-7 work days after payment confirmation. Pricing is negotiable, allowing for tailored solutions that meet budgetary constraints without compromising on quality. Overall, the ASCO solenoid valve represents a dependable, efficient, and adaptable solution for a wide range of application scenarios requiring precise fluid control.

Packing and Shipping:

Each ASCO Solenoid Valve is carefully packaged to ensure protection during transit. The valve is first placed in a protective plastic bag to prevent moisture and dust contamination. It is then securely positioned within a custom-fitted foam insert inside a sturdy cardboard box to minimize movement and potential damage.

The packaging includes all necessary documentation such as installation instructions, warranty information, and a product certification card. For bulk shipments, valves are packed in larger cartons with adequate cushioning between individual boxes to provide additional protection.

Shipping is handled through reliable carriers with options for expedited or standard delivery to meet customer requirements. Each shipment is labeled with handling instructions and tracking information to ensure safe and timely delivery of the ASCO Solenoid Valves to the customer’s location.