Product Overview
The SMC AR20-01BG-B is a precision pneumatic pressure regulator from the SMC AR series, engineered to deliver stable, repeatable downstream pressure control in compressed air systems. As a process and pneumatic valve component, it operates on a diaphragm-actuated, spring-loaded regulating principle: an adjusting knob compresses a control spring that balances against downstream air pressure acting on a diaphragm, modulating the internal valve seat to maintain the set outlet pressure regardless of fluctuations in inlet pressure or flow demand. The AR20-01BG-B features a 1/8″ port size, a panel-mount capable body, and an integrated pressure gauge for direct visual monitoring of the regulated output. This regulator serves as a critical control element in pneumatic circuits, protecting downstream actuators, air tools, and instrumentation from over-pressure conditions while ensuring consistent operating pressure for repeatable process performance.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Process & Pneumatic Valve — Pressure Regulator |
| Model Designation | AR20-01BG-B |
| Series | SMC AR Series Modular Regulator |
| Port Size | 1/8 (01) — Rc/PT thread |
| Operating Pressure | Standard Industrial Grade (Up to rated bar) |
| Mounting & Connection | Standard ISO / Manufacturer Interface — panel mount capable |
| Adjustment Type | Knob with locking mechanism |
| Pressure Gauge | Integrated round gauge (B configuration) |
| Media | Compressed air / inert gas |
Engineering Features & Advantages
- Precision Performance: Diaphragm-balanced regulating mechanism delivers stable outlet pressure with minimal droop across varying flow rates, ensuring repeatable pneumatic process control.
- Integrated Pressure Monitoring: Factory-fitted pressure gauge enables immediate visual verification of regulated output, reducing setup time and simplifying troubleshooting.
- Modular Compatibility: Designed for direct integration with SMC modular FRL units, allowing streamlined assembly of filters, lubricators, and regulators on a single manifold.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust body construction and wear-resistant internal sealing.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards for drop-in service replacement.
Typical Industrial Applications
The SMC AR20-01BG-B pneumatic pressure regulator is widely deployed across heavy industrial environments including plastic injection molding machines, CNC machine tools, automated assembly and packaging lines, and general factory automation systems. It is equally suited to pneumatic actuator control circuits,
PRODUCT IMAGES


SMC AR20-01BG-B Pneumatic Pressure Regulator
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- 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 AR20-01BG-B Pneumatic Pressure Regulator. This Japan-made 1/8 ported pneumatic component features a relieving pressure regulation design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.