ASCO 551 Series

Pipe / Port Size – 1/4″
Body Material – Brass, Stainless Steel, Aluminum
Function – 3 way – 3/2 Normally Closed, 4 way – 5/2, 4 way – 5/3 – Closed Center, 4 way – 5/3 – Open Center
Voltage – 24 AC, 110 AC, 120 AC, 220 AC, 480 AC, 6 DC, 12 DC, 24 DC, 120 DC, 240 DC | 50, 60

The ASCO Series 551, also known as 8551, is a line of 1/4″ 3-way and 4-way 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 shutoff, dirt resistance, and multi-million cycle reliability. The 551 Series comes in anodized aluminum, brass, and stainless steel bodies with ¼-inch NPT and BSP connections. It is suitable for the harsh conditions found in chemicals, refining, food & beverage applications and life science processing.

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