Air line regulator for controlled, consistent air pressure as required for specific pneumatic equipment connected to the air system. view larger Ingersoll Rand R37121-600-VS 1/4-Inch Regulator Clean air is a key ingredient that enables effective and efficient use of tools, equipment, and machinery in almost every industry. As such, the use of air preparation devices, such as filters, regulators, and lubricators (FRLs), is an excellent means of keeping your air supply in top condition, as well as enabling your tools and equipment to operate at their peak performance. The ARO-Flo series FRLs from Ingersoll Rand continue the tradition of offering premium products for your operation, and also raises the bar in the industry for safety, flow performance, and modularity. R37121-600 Features: Flush-mount gauge 0-140 PSI pressure range Relieving - standard knob control Industry-leading flow rates Low leak rates All modular design Full line accessory set 5-micron standard filter Locking bowls for safety 2-year warranty