Arrow Pneumatics R398 High Flow Regulator is a 1-inch FNPT inline pressure regulator designed for high-volume air systems, delivering up to 600 CFM of flow at a maximum inlet pressure of 250 psi. It belongs to Arrow’s R39 family of high-flow regulators, built to regulate downstream pressure in industrial compressed-air circuits where large flow capacity is required. The R398 uses a robust valve-based design suited to demanding applications and is also available as a gauge-equipped variant (R398G) for direct pressure monitoring. Typical use cases include feeding large-diameter lines and high-flow tool manifolds in manufacturing environments where consistent airflow is critical.
