ARO 651790-A1D-B Downstream Pressure Regulator

ARO 651790-A1D-B is a downstream regulator in ARO’s 65179X family (the -B suffix denotes downstream models) that maintains a stable downstream pressure in pneumatic circuits. It uses a 3/8 in NPTF port (3/8-18) and features a zinc/aluminum body with a tungsten carbide seat for durability in demanding service. The downstream setpoint ranges from 50 to 200 psi (3.4 to 14 bar), while the maximum inlet pressure is up to 800 psi (55 bar), making it suitable for low‑to‑mid‑pressure regulation in compact installations. The A1D-B designation specifies the tungsten carbide seating option within this family, distinguishing it from other material configurations. Typical applications include protecting downstream components and delivering consistent pressure in compressed‑air lines or similar non‑corrosive gas services where precise regulation is essential. In a robust metal package, this regulator provides reliable, repeatable performance with a clearly defined pressure window for systems requiring tight control.