PneumaticPlus PPR4-N06BG Air Pressure Regulator | 3/4" NPT, 210 SCFM | Embedded Gauge & Bracket Included
The PneumaticPlus PPR4-N06BG is a general-purpose, relieving-type compressed air pressure regulator that reduces high, fluctuating supply pressure to a stable, usable level downstream. Rated at 210 SCFM through 3/4" NPT ports, it holds your set pressure steady as demand rises and falls.
An embedded 0–140 PSI gauge gives at-a-glance monitoring, the fully adjustable 0–140 PSI regulating range lets you dial in the working pressure each tool or process needs, and a push-to-lock knob keeps your setting secure under vibration.
ARO® Cross-Reference: PneumaticPlus PPR4-N06BG replaces ARO® R37351-100 (and R37351 variants) and is interchangeable on the same air line.
Common Applications & Use Cases
The PPR4-N06BG is sized for 3/4" NPT shop and production air lines that need a constant downstream setpoint.
- Air tools: Holds a steady working pressure as tool demand changes.
- Spray guns: Keeps line pressure at a constant setpoint for consistent results.
- Actuators and cylinders: Delivers stable pressure to automation and machine circuits.
- Pneumatic machinery: Reduces fluctuating supply pressure to a usable level downstream.
Technical Specifications – PPR4-N06BG
| Feature | Details |
|---|---|
| Model | PPR4-N06BG |
| Type | Relieving-type compressed air pressure regulator |
| Port Size | 3/4" NPT |
| Flow Rate | 210 SCFM @ 90 PSI |
| Regulating Range | 0–140 PSI |
| Max Supply Pressure | 250 PSI |
| Gauge | Embedded 0–140 PSI gauge |
| Adjustment | Push-to-lock adjustment knob |
| Mounting | Panel/wall mounting bracket included |
| Replaces | ARO® R37351-100 and R37351 variants |
| Country of Origin | Made in Korea |
| Warranty | 1 Year Limited Manufacturer Warranty |
What’s Included: PPR4-N06BG regulator with embedded 0–140 PSI gauge and a panel/wall mounting bracket. Ships ready to install with no extra parts to source.
PPR Series Sizes & ARO® Cross-Reference
| PneumaticPlus Model | Port Size | Regulating Range | Replaces ARO® Part No. |
|---|---|---|---|
| PPR2-N02BG | 1/4" NPT | 0–140 PSI | R37121-600 |
| PPR2-N02BG-2 | 1/4" NPT | 3–30 PSI (low pressure) | R37121-400 |
| PPR2-N02BG-4 | 1/4" NPT | 3–60 PSI (low pressure) | R37121-200 |
| PPR3-N02BG | 1/4" NPT (high flow) | 0–140 PSI | R37221-600 |
| PPR3-N03BG | 3/8" NPT | 0–140 PSI | R37231-600 |
| PPR4-N04BG | 1/2" NPT | 0–140 PSI | R37341-600 |
| PPR4-N06BG (this item) | 3/4" NPT | 0–140 PSI | R37351-100 |
Frequently Asked Questions
Q: What does the PPR4-N06BG replace?
A: It is an aftermarket replacement compatible with ARO® R37351-100 and other ARO® R37351 variants, and is interchangeable on the same air line.
Q: What does relieving type mean?
A: When downstream pressure rises above your setpoint, the regulator automatically vents the excess. This helps protect air tools and sensitive equipment.
Q: What is the flow rate and pressure range?
A: The PPR4-N06BG is rated at 210 SCFM at 90 PSI through 3/4" NPT ports. The regulating range is 0–140 PSI, with a 250 PSI maximum supply pressure.
Q: Is a gauge included?
A: Yes. An embedded 0–140 PSI pressure gauge is built into the regulator, so there is no separate gauge to install.
Q: What comes in the package?
A: The PPR4-N06BG regulator with embedded gauge and a panel/wall mounting bracket.
Third-Party Trademark Notice: ARO® is a registered trademark of its respective owner. PneumaticPlus is not affiliated with, sponsored by, authorized by, or endorsed by ARO or any of its affiliates. All trademarks and registered trademarks are the property of their respective owners. References to ARO part numbers are provided for identification and cross-reference/compatibility purposes only.
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PneumaticPlus is proud to support the U.S. businesses and industries that keep the country moving. Headquartered in Carson, California, we help customers find the right products for their applications and back them with dependable support before and after the sale. Our goal is to provide reliable industrial solutions, practical expertise, and responsive service that customers can count on.
