Aro
ARO R37121-100 Air Regulator 1/4 NPT 59 cfm 250 psi
Regulates compressed air lines at up to 59 cfm and 250 psi with a 1/4 NPT female inlet and outlet, aluminum body and knob adjustment
- MaterialHAWA
- Precise pressure control with 250 psi maximum operating pressure
- High-volume airflow up to 59 cfm for demanding tools
- Durable aluminum body with EPDM seals resists wear
- Compact 2 7/16 in width fits tight panel spaces
- 1/4 NPT female ports integrate directly into air lines
1/4 NPT Air Regulator for Pneumatic Lines
The ARO R37121-100 is a compressed air regulator built for 1/4 inch NPT female connections on both inlet and outlet. It suits workshops and industrial plants that need reliable pressure control on a main air line or branch circuit. The aluminum body and EPDM seals handle standard shop air up to the rated limits. Buyers who need a larger port size or integrated gauge should look elsewhere.
Sustained Flow at 59 cfm and 250 psi
Rated for a maximum flow of 59 cfm and a maximum operating pressure of 250 psi, the regulator maintains set pressure during continuous demand rather than only in short bursts. The knob adjustment lets operators dial in the working pressure while the system runs. Maximum operating temperature is 140 degrees F, so the unit stays stable in warm compressor rooms. No pressure gauge is included.
Panel Mount with Included Nut
A panel nut is supplied for through-panel mounting, and the 2 7/16 inch overall width fits standard cut-outs. Installation requires only threading the NPT ports and tightening the panel nut from the front. The most common issue is forgetting thread sealant on the 1/4 inch connections, which causes leaks at full pressure. Verify flow direction arrows before final tightening.
Highlights
- Precise pressure control with 250 psi maximum operating pressure
- High-volume airflow up to 59 cfm for demanding tools
- Durable aluminum body with EPDM seals resists wear
- Compact 2 7/16 in width fits tight panel spaces
- 1/4 NPT female ports integrate directly into air lines
Specifications
| Brand | ARO |
|---|---|
| Material | HAWA |
Questions about this item
How much air can the R37121-100 pass continuously at its 250 psi rating?
The regulator is rated for a maximum flow of 59 cfm at up to 250 psi operating pressure.
What fittings do I need on my air line to install this 1/4 in NPT regulator?
Both inlet and outlet are 1/4 in female NPT, so you need male 1/4 NPT connectors on your hose or piping.
Will the 140 °F temperature limit handle the output from my older compressor that runs hot?
The unit is rated to 140 °F; if your compressor discharge exceeds that, add cooling or a separator upstream.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
SIEMENS
SIEMENS 52PP2D2AB 30 mm Illuminated Push Button Red 24 V LED 1NO/1NC
$179.99
0.0021313BTC
In stock