The ASCO 551 series is a line of compact solenoid spool valves that are ideal for controlling air or inert gas in challenging environments. The valves unique design combines hard T-seals and flexible O-rings that provide bubble-tight shut-off, dirt resistance and multi-million cycle reliability. The 551 series comes in anodized aluminum, brass and stainless steel bodies with 1/4 IN NPT and BSP connections. It is suitable for the harsh conditions found in chemicals, refining, food and beverage applications and life science processing.

Asco Asco In-Line Spool Valve, Type: Combination General-Purpose And Watertight, Direct Mount, Pilot Operated, In-Line Spool Valve, Series/Model: WT8551A001MS, 1/4 IN Nominal, Connection Type: NPT, Number of Ports/Ways: 4, Solenoid Actuation, 30 - 150 PSI, 0.7 CMH Flow Rate, 5 - 140 DEG F, 1/4 IN Orifice, Aluminum Body, NBR/PUR Seal, Coil Insulation Class: Class FT, 6.3 W, 110 - 120 VAC, NEMA 1, 2, 3, 3S, 4, 4X Enclosure, Finish/Color: Black, Industry Standards: UL Listed, CSA Certified, CE Marked, 1.77 IN Width, 1.3 IN Height, Other Physical Dimension: 7.56 IN Length, Additional Specifications: Frequency Rating: 50/60 HZ, Lead Length: 18 IN, Asco

• Compact spool valve convertible from 3/2 to 5/2 with a single flow plate design (551 series only)
• NAMUR-mount construction
• Standard manual operator
• Single and dual solenoid constructions
• Mountable in any position
• Vents air from spring side of actuator to prevent corrosion of actuator

• Specification Name https://www.macombgroup.com//ASSETS/DOCUMENTS/ITEMS/EN/ASCOEF8551A001MS120AC_Spec.pdf