The ASCO Series 551 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 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.
Features
Specifications
Valve Actuation | Solenoid - Air Pilot |
Body Material | Brass, Stainless Steel, Aluminum |
Media | Air, Inert Gas |
Pipe / Port Size | 1/4 " |
Port Type | G ISO228/1-G BSPP, NPTF |
Function | 3 way - 3/2 Normally Closed, 4 way - 5/2, 4 way - 5/3 - Closed Center, 4 way - 5/3 - Open Center |
Flow | From 0.5 Cv to 1.0 Cv, From .43 to .86 Kv |
Voltage | 24 AC, 110 AC, 120 AC, 220 AC, 480 AC, 6 DC, 12 DC, 24 DC, 120 DC, 240 DC | 50, 60 |
Max Differential / Max Operating Pressure | Vacuum to 150 PSIG |
Operating Environment | Corrosive, Hazardous, Indoor, Outdoor |
Standards / Regulations | ATEX Zone 1-21, ATEX Zone 2-22, Class I Div 1, Class II Div 1, SIL, Type 1, Type 2, Type 3, Type 3S, Type 4, Type 4X, Type 6, Type 6P, Type 7, Type 9 |
Temperature | -60°C to 80°C |