---
product_id: 6198521
title: "Ingersoll Rand ARO R37121-600-VS 1/4\" NPT Air Regulator with Gauge"
brand: "ingersoll rand"
price: "¥14242"
currency: JPY
in_stock: true
reviews_count: 13
category: "Ingersoll Rand"
url: https://www.desertcart.jp/products/6198521-ingersoll-rand-aro-r37121-600-vs-1-4-npt-air
store_origin: JP
region: Japan
---

# 0-140 PSI pressure range 59 CFM max flow rate 1/4" NPT precision fit Ingersoll Rand ARO R37121-600-VS 1/4" NPT Air Regulator with Gauge

**Brand:** ingersoll rand
**Price:** ¥14242
**Availability:** ✅ In Stock

## Summary

> ⚡ Regulate with precision, perform with power!

## Quick Answers

- **What is this?** Ingersoll Rand ARO R37121-600-VS 1/4" NPT Air Regulator with Gauge by ingersoll rand
- **How much does it cost?** ¥14242 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/6198521-ingersoll-rand-aro-r37121-600-vs-1-4-npt-air)

## Best For

- ingersoll rand enthusiasts

## Why This Product

- Trusted ingersoll rand brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **High Flow Capacity:** Supports up to 59 CFM, perfect for demanding industrial applications.
- • **Precision Pressure Control:** Maintain optimal air pressure with a 0-140 PSI range for flawless performance.
- • **Robust 1/4" NPT Connection:** Ensures a secure, leak-free fit for professional-grade reliability.
- • **Durable & Lightweight Design:** Compact 7.5 x 3.2 x 2.8 inch build weighing just 5.6 oz for easy installation and longevity.
- • **Integrated Flush-Mount Gauge:** Instantly monitor pressure levels with a sleek, easy-to-read gauge.

## Overview

The ARO R37121-600-VS Air Regulator by Ingersoll Rand offers precise air pressure control with a 0-140 PSI range, a flush-mount gauge for real-time monitoring, and a robust 1/4" NPT connection. Designed for high flow applications up to 59 CFM, this lightweight and durable regulator ensures reliable performance in professional settings, backed by a 2-year limited warranty.

## Description

Product Description ARO-Flo 1000 Series Air Regulator-1/4"" NPT Port-59 SCFM-250 psig Max inlet Pressure-0-140 psig Regulator Pressure Range-Flush Mount Pressure Gauge-23-140°F Temperature Range From the Manufacturer ARO-Flo air line regulators provide controlled, consistent air pressure as required for specific pneumatic equipment connected to the air system. All regulators are offered with a standard adjustment range of 0-140 PSI G.

Review: First rate design and construction - This may well be the best regulator I've seen. If I have one complaint, it's that the gauge seems small. That's no surprise, though. It's integrated into the regulator, and the whole block is rather small. Even so, it's a small complaint. Everything is well-marked and legible, and I am most impressed with everything else about it. I use a 30-gallon, oil-lubricated automotive compressor to run an airbrush. This is probably overkill, but for 5 minutes of noise, I get 2-3 hours of quiet work time. Unfortunately, my compressor has been eating regulators at the rate of one a year, though the last one only lasted 2 months. They work fine at 40 lbs, and may even work well at higher pressures. But sooner or later, when I run the pressure up to 80 or 90 lbs to fill a tire, the thing fails. As you may know, a regulator usually costs $20 to $60. It's a bother. The regulators I've bought at the Big Box stores seem really cheap. Their performance has been lackluster with several pounds of pressure loss when I actually start spraying. I've had replacement regulators fail right out of the package, too. Not good! With respect to most of the actual failures, I've since learned that it is extremely important to raise and lower the pressure slowly - more slowly than I've been doing it. Raising and lowering the pressure too quickly puts undue stress on the springs and seals. But the pressure and quality issues are still a bother, and I still needed a new regulator. So, I chose this one because I-R is a respected brand, this looked well-made, and the price was right. I'm happy to report that this is an outstanding piece of hardware, and apparently bargain priced. Other sites want $40 to $50 for the same unit. First, this has a very handsome, modular design. Second, all the parts seem well-made and fit together nicely. To adjust the inner range band, you do need to carefully remove the front housing, It snaps off and reveals the gauge assembly. Then, you move the yellow arrows as desired to set your pressure range. You pop the housing back into place and all is good. If you want the pressure knob on top, you remove the housing, remove a couple screws, carefully turn the gauge assembly 180 degrees, replace the screws, and replace the housing. Done! Once installed, I found the regulator has very little pressure drift - maybe a pound or two. Very Happy! Visiting the I-R site, I found that the company recommends putting a dirt & water filter between the air source and the regulator. No stock consumer compressor I've seen has this, and I've noticed buildup of contaminants in a couple of my worn regulators. So, this seems prudent and I will soon install a good filter unit to better protect my regulator. I recommend this as a very good, bargain-priced replacement regulator. I expect this to perform better and last longer than any other regulator I've tried. I will try to post updates over time. Thanks for reading.
Review: Medium Size - High Quality - Great All Around But Very Small Dial - High quality build and materials. Quality trusted brand. Feels very sturdy. Good size for a small semi-portable compressor. Combined with the matching water separator, it will make a great combination. Adjustment is smooth and the locking mechanism feels positive. My only complaint would be that the gauge is tiny. You'll need good eyesight, but I like how compact and protected it is, making it less vulnerable to damage if the compressor tips over in the truck bed. Follow Up After Installing: This is the best regulator I have ever owned on a compressor. Hands down. It is compact but very well made. The adjustment is smooth and easy to dial in to whatever pressure you want, from max pressure right down to 0 and all points in between. Very smooth and controlled, lets you be very precise. Maintains a consistent pressure wherever you set it. Fantastic! For the price and quality, it's a bargain.

## Features

- HAWA
- 1/4-Inch NPT
- 0-140 PSI Pressure Range
- Flush-mount gauge
- Relieving - standard knob control
- 59 CFM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0057D8LMY |
| Best Sellers Rank | #123,984 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #383 in Air-Compressor Accessories |
| Brand | Ingersoll Rand |
| Brand Name | Ingersoll Rand |
| Connector Type | Threaded |
| Customer Reviews | 4.4 out of 5 stars 431 Reviews |
| Global Trade Identification Number | 00663023080086 |
| Included Components | Air Regulator |
| Inlet Connection Size | 0.25 inches |
| Inlet Connection Type | Threaded |
| Item Dimensions | 7.5 x 3.2 x 2.8 inches |
| Item Highlight | Features a 1/4" NPT connection, pressure gauge, and 250 PSI max inlet, ideal for precise compressed air regulation |
| Item Type Name | Air Regulator |
| Item Weight | 5.6 ounces |
| Item dimensions L x W x H | 7.5 x 3.2 x 2.8 inches |
| Manufacturer | Ingersoll Rand |
| Manufacturer Part Number | R37121-600-VS |
| Manufacturer Warranty Description | 2 Year Limited Warranty |
| Material | Air Line Regulator |
| Material Type | Air Line Regulator |
| Maximum Pressure | 250 psi |
| Model Number | R37121-600-VS |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Outlet Connection Size | 0.25 inches |
| Outlet Connection Type | NPT |
| Size | 1/4" NPT |
| Thread Size | 1/4 |
| Thread Type | Npt |
| UPC | 663023080086 785479951649 |
| Unit Count | 1 Count |
| Valve Type | Air Control Valve |

## Product Details

- **Brand:** Ingersoll Rand
- **Material:** Air Line Regulator
- **Item dimensions L x W x H:** 7.5 x 3.2 x 2.8 inches
- **Item Weight:** 0.35 Pounds
- **UPC:** 663023080086 785479951649

## Images

![Ingersoll Rand ARO R37121-600-VS 1/4" NPT Air Regulator with Gauge - Image 1](https://m.media-amazon.com/images/I/91uQ5n2j27L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ First rate design and construction
*by A***L on June 7, 2012*

This may well be the best regulator I've seen. If I have one complaint, it's that the gauge seems small. That's no surprise, though. It's integrated into the regulator, and the whole block is rather small. Even so, it's a small complaint. Everything is well-marked and legible, and I am most impressed with everything else about it. I use a 30-gallon, oil-lubricated automotive compressor to run an airbrush. This is probably overkill, but for 5 minutes of noise, I get 2-3 hours of quiet work time. Unfortunately, my compressor has been eating regulators at the rate of one a year, though the last one only lasted 2 months. They work fine at 40 lbs, and may even work well at higher pressures. But sooner or later, when I run the pressure up to 80 or 90 lbs to fill a tire, the thing fails. As you may know, a regulator usually costs $20 to $60. It's a bother. The regulators I've bought at the Big Box stores seem really cheap. Their performance has been lackluster with several pounds of pressure loss when I actually start spraying. I've had replacement regulators fail right out of the package, too. Not good! With respect to most of the actual failures, I've since learned that it is extremely important to raise and lower the pressure slowly - more slowly than I've been doing it. Raising and lowering the pressure too quickly puts undue stress on the springs and seals. But the pressure and quality issues are still a bother, and I still needed a new regulator. So, I chose this one because I-R is a respected brand, this looked well-made, and the price was right. I'm happy to report that this is an outstanding piece of hardware, and apparently bargain priced. Other sites want $40 to $50 for the same unit. First, this has a very handsome, modular design. Second, all the parts seem well-made and fit together nicely. To adjust the inner range band, you do need to carefully remove the front housing, It snaps off and reveals the gauge assembly. Then, you move the yellow arrows as desired to set your pressure range. You pop the housing back into place and all is good. If you want the pressure knob on top, you remove the housing, remove a couple screws, carefully turn the gauge assembly 180 degrees, replace the screws, and replace the housing. Done! Once installed, I found the regulator has very little pressure drift - maybe a pound or two. Very Happy! Visiting the I-R site, I found that the company recommends putting a dirt & water filter between the air source and the regulator. No stock consumer compressor I've seen has this, and I've noticed buildup of contaminants in a couple of my worn regulators. So, this seems prudent and I will soon install a good filter unit to better protect my regulator. I recommend this as a very good, bargain-priced replacement regulator. I expect this to perform better and last longer than any other regulator I've tried. I will try to post updates over time. Thanks for reading.

### ⭐⭐⭐⭐⭐ Medium Size - High Quality - Great All Around But Very Small Dial
*by A***E on June 12, 2015*

High quality build and materials. Quality trusted brand. Feels very sturdy. Good size for a small semi-portable compressor. Combined with the matching water separator, it will make a great combination. Adjustment is smooth and the locking mechanism feels positive. My only complaint would be that the gauge is tiny. You'll need good eyesight, but I like how compact and protected it is, making it less vulnerable to damage if the compressor tips over in the truck bed. Follow Up After Installing: This is the best regulator I have ever owned on a compressor. Hands down. It is compact but very well made. The adjustment is smooth and easy to dial in to whatever pressure you want, from max pressure right down to 0 and all points in between. Very smooth and controlled, lets you be very precise. Maintains a consistent pressure wherever you set it. Fantastic! For the price and quality, it's a bargain.

### ⭐⭐⭐⭐ It works
*by F***N on June 30, 2012*

This is a small and light weight air regulator with 1/4 NPT fittings. I'm using it on my home garage compressor (150PSI Max 5.4CFM @90 from HF). It seems to be holding up and doing it's job. I use the setup probably once to twice a week. It is hooked with a filter, T fitting (for full pressure feed to cleaning hose) and NPT quick conects. This is not the type of unit that you want to be mounting to the wall (although you could) expecting heavy use out of. So far so good. I figured for the price I could give it a shot. Also using the Matching filter.. it works as well. Four stars because it is very 'light duty' and feels like I could break it without a lot of effort. This is being use with Air Tools like impact wrenches, rachets and grinders. Could feel a little more solid.

## Frequently Bought Together

- ARO R37121-600-VS Air Regulator 1/4" NPT, w/Gauge - 250 psi Max Inlet
- TAILONZ PNEUMATIC Elbow and Straight Combination 1/4 Inch Tube OD x 1/4 Inch NPT Thread Push to Connect Fittings PC-1/4-N2+PL-1/4-N2(Pack of 12)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-26*