NG # 039440003-HW-ASCO-003
ASCO Series 551 (8551) is a compact, high-flow solenoid spool valve designed for controlling air and inert gas in industrial pneumatic systems. Its unique sealing design combines hard T-seals and flexible O-rings to provide bubble-tight shutoff, dirt resistance and reliable operation over millions of cycles.
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Get A QuoteThe ASCO 551 series is suitable for controlling pneumatic actuators and process valves in demanding industrial environments. Available in 3-way and 4-way configurations, it supports different control functions and mounting requirements. Its compact construction and durable spool design make it suitable for chemical processing, refining, food and beverage, and life science applications. Multiple body materials and electrical coil options provide flexibility for different operating conditions.
Valve function: 3-way (3/2) and 4-way (5/2, depending on configuration)
Actuation: Solenoid-operated or solenoid air-pilot-operated
Media: Air and inert gas
Port size: ¼ inch
Connection types: NPT and BSP
Body materials: Anodized aluminium, brass and stainless steel
Flow capacity: Approximately 0.86 Cv (varies by model)
Sealing: Hard T-seals and flexible O-rings
Voltage options: Multiple AC and DC configurations
Mounting: Inline and NAMUR mounting options
Applications: Pneumatic actuator control, chemical processing, refining, food and beverage, and life science processing
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