ASCO
Solenoid Valves, Pressure and Temperature Switches
ASCO (formerly Numatics), a member of the Emerson family, is a leading innovator in the world of fluid automation. Known for engineering reliable, high-performance solenoid valves, pressure switches, and temperature switches, ASCO products are designed to precisely manage the flow of air, gas, water, oil, and steam across a wide range of industries.
From rugged industrial applications to delicate process control environments, ASCO components are built to last—delivering dependable performance backed by decades of engineering excellence.
Their product portfolio includes everything from micro-miniature solenoid valves and pressure/temperature switches to advanced pneumatic controls, sensors, and position indication technology with integrated network communication capabilities.
Centro is proud to be an authorized distributor of ASCO’s fluid control solutions. Whether you're looking to improve process efficiency, ensure safety, or support automation goals, we can help you find the right ASCO solenoid valves, directional control valves, or pressure switches for your application.
With a legacy built on innovation and reliability, ASCO continues to lead the way in fluid control technology. Let Centro help you take advantage of everything ASCO has to offer—reach out today to get started.
- Choose based on (1) function: 2-way = on/off flow, 3-way = divert/exhaust/control; (2) normal state: Normally Closed (NC) shuts off when de-energized; Normally Open (NO) flows when de-energized; (3) media, temperature, pressure, and required pressure differential (MOPD)
- MOPD is the Maximum Operating Pressure Differential, the maximum pressure drop across the valve at which it can reliably open. It’s essentially the “can this valve shift under my pressure conditions?” spec. ASCO notes MOPD depends on factors like fluid type, and AC coils often allow higher pressure ratings than DC.
- Many ASCO lines (example: 8210 family) offer watertight RedHat II enclosures with multiple ratings (commonly Types 1, 2, 3, 3S, 4, 4X), and explosionproof/watertight options depending on configuration. Options vary by series, always verify the specific catalog sheet for your model.
- ASCO installation/maintenance guidance commonly recommends periodic cleaning, with frequency based on the medium and service conditions. Symptoms like sluggish operation, excessive noise, or leakage can indicate cleaning is required; keeping the media free of dirt/foreign material (filters/strainers) helps prevent failures.