1. Product Overview
The SMC AR20-01BG is an air pressure regulator designed for industrial pneumatic systems. It is engineered to maintain a constant output pressure regardless of fluctuations in the input pressure or changes in air consumption. This device is crucial for ensuring stable operation of pneumatic equipment.
Key features include:
- Pipe Connection Diameter: RC1/8 mm
- Integrated Pressure Gauge for easy monitoring
- Includes a mounting bracket for secure installation
Note: This product is intended for professional use and requires appropriate knowledge and skill in air pressure systems for safe and effective operation.
2. Safety Information
Always observe the following safety precautions to prevent accidents and ensure proper operation:
- Ensure the air supply is completely shut off and residual pressure is released before installation, maintenance, or inspection.
- Do not exceed the maximum operating pressure specified for the regulator.
- Use only clean, dry compressed air. Contaminants can damage the regulator and connected equipment.
- Install the regulator in a location free from excessive vibration, direct sunlight, or corrosive environments.
- Wear appropriate personal protective equipment (PPE) during installation and maintenance.
- Consult a qualified technician if you are unsure about any installation or operation procedures.
3. Product Components
The SMC AR20-01BG regulator consists of the main body, an integrated pressure gauge, and a pressure adjustment knob. A mounting bracket is also included for installation.
Image 1: Front view of the SMC AR20-01BG air pressure regulator. It shows the silver-colored main body with a circular pressure gauge displaying readings in MPa. Below the gauge, the model number "AR20-02E" is visible. The lower part of the regulator is black, indicating the filter bowl or connection area.
Note: The image provided displays model AR20-02E, which is visually similar to the AR20-01BG. The core functionality and appearance are representative, but specific connection sizes may vary between models.
4. Setup and Installation
- Preparation: Ensure the air supply is turned off and depressurized. Verify that the regulator's specifications match your system requirements.
- Mounting: Use the provided bracket to securely mount the regulator to a stable surface. Ensure it is installed vertically with the pressure gauge facing an easily viewable direction.
- Pipe Connection: Connect the inlet port (typically marked "IN" or with an arrow indicating flow direction) to the main air supply line. Connect the outlet port (typically marked "OUT") to the pneumatic equipment. The pipe connection diameter for this model is RC1/8 mm. Use appropriate thread sealant (e.g., PTFE tape) to ensure airtight connections.
- Leak Check: After installation, slowly turn on the air supply. Check all connections for leaks using a soapy water solution. Tighten connections as necessary.
5. Operating Instructions
- Pressure Adjustment: To adjust the output pressure, pull up the adjustment knob (usually located on top of the regulator). Turn the knob clockwise to increase pressure and counter-clockwise to decrease pressure.
- Monitoring Pressure: The integrated pressure gauge displays the current output pressure. Adjust the knob until the desired pressure is indicated on the gauge.
- Locking Adjustment: Once the desired pressure is set, push the adjustment knob down to lock it in place. This prevents accidental changes to the pressure setting.
- Initial Startup: When starting the system, gradually increase the pressure to the desired operating level to avoid sudden surges that could damage equipment.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your SMC AR20-01BG regulator.
- Daily Check: Visually inspect the regulator for any signs of damage, leaks, or unusual operation. Monitor the pressure gauge to ensure stable output.
- Filter Element (if applicable): If your system includes a filter upstream of the regulator, ensure it is regularly drained and the filter element is replaced as per the filter's instructions. While this regulator does not explicitly state an integrated filter, clean air supply is critical.
- Cleaning: Clean the exterior of the regulator with a soft, damp cloth. Do not use harsh chemicals or solvents, as they may damage the materials.
- Periodic Inspection: Periodically check all connections for tightness. Inspect the pressure gauge for accuracy and readability.
Always depressurize the system before performing any maintenance or inspection.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No output pressure or low output pressure |
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| Output pressure fluctuates |
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| Air leakage from regulator |
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8. Specifications
| Model Number | AR20-01BG |
| Brand | SMC |
| Pipe Connection Diameter | RC1/8 mm |
| Pressure Gauge | Round, Integrated |
| Mounting | Bracket included |
| Package Dimensions | 7.87 x 7.87 x 5.91 inches |
| Item Weight | 3.31 Pounds |
| Manufacturer | SMC (エスエムシー) |
| Date First Available | February 15, 2015 |
9. Warranty Information
Specific warranty details for the SMC AR20-01BG air pressure regulator are not provided in the available product information. Please refer to the official SMC website or contact your authorized distributor for comprehensive warranty terms and conditions.
For general information, you may visit the SMC Store on Amazon.
10. Customer Support
For technical assistance, spare parts, or further inquiries regarding the SMC AR20-01BG regulator, please contact SMC customer support or your local authorized SMC distributor.
Contact information is typically available on the official SMC global or regional websites.

