Product Overview
The SMC AS420 is a precision pneumatic speed controller (flow control valve) engineered by SMC Corporation, a global leader in pneumatic and industrial automation components. Operating on a unidirectional flow control principle, the AS420 integrates a needle valve for precise flow metering with a built-in check valve that permits free reverse flow. This configuration enables accurate, repeatable adjustment of actuator rod speed in one direction while allowing unrestricted return flow, making it an essential component for controlling cylinder stroke velocity in automated pneumatic systems. The AS420 is designed for inline or elbow mounting directly at the cylinder port, minimizing air volume between the valve and actuator for optimal response characteristics.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pneumatic Speed Controller (Flow Control Valve with Check Valve) |
| Model Designation | AS420 |
| Series | SMC AS Series — Speed Controller |
| Operating Pressure | 0.1 – 1.0 MPa (1 – 10 bar) — Standard Industrial Grade |
| Proof Pressure | 1.5 MPa (15 bar) |
| Fluid Medium | Compressed Air (non-lubricated or lubricated) |
| Flow Control Method | Needle valve with calibrated adjustment — unidirectional metering |
| Check Valve Function | Integrated — free reverse flow bypass |
| Port Size | 1/4 Rc (PT) — standard SMC port thread |
| Mounting & Connection | Inline / elbow body — direct cylinder port mounting |
| Adjustment Type | Manual needle adjustment with lock nut |
| Body Material | Die-cast zinc / resin body — corrosion-resistant finish |
| Seal Material | NBR (Nitrile) — standard pneumatic sealing |
Engineering Features & Advantages
- Precision Performance: The pneumatic speed controller (flow control valve with check valve) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Precision-manufactured to original SMC specifications for direct replacement, minimising downtime and eliminating fitment issues.
- Rated Capability: Rated for pressure ratings of 0.1 – 1.0 MPa (1 – 10 bar) — Standard Industrial Grade, supporting stable operation across the full working range.
Typical Industrial Applications
This configuration enables accurate, repeatable adjustment of actuator rod speed in one direction while allowing unrestricted return flow, making it an essential component for controlling cylinder stroke velocity in automated pneumatic systems.
PRODUCT IMAGES
SMC AS420 Pneumatic Speed Controller
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SMC AS420 Speed Control Valve. This Japan-made pneumatic flow control valve features a compact, precise needle design, delivering reliable, leak-free air flow regulation for industrial automation systems.