Ingersoll Rand ARO R37121-100 Air Regulator 1/4 In NPT

Ingersoll Rand ARO R37121-100 is a 1/4" NPT air regulator from the ARO-Flo 1000 Series, designed as a relieving regulator with a compact aluminum body and standard knob control. It delivers regulated compressed air to tools and actuators, with ports sized for 1/4" NPT connections for easy integration into shop or industrial lines. The unit provides adjustable output from 0 to 140 psi and tolerates inlet pressures up to 250 psi, while offering a flow capacity of up to 59 SCFM at typical operating pressures. With its relieving function, excess pressure is vented to atmosphere to prevent over-pressurization, a key safety feature in many pneumatic systems. Ideal for compact installations where space is at a premium, this regulator is commonly used to set operating pressure for general pneumatic tooling, spray equipment, and automation components.