Watts FluidAir R119-03A Pneumatic Pressure Regulator

The Watts FluidAir R119-03A M3 Pneumatic Pressure Regulator is a 3/8 in NPT inline regulator with a relieving, diaphragm-operated design that automatically reduces incoming compressed-air pressure to a controlled downstream level for accurate, fast-response operation in pneumatic systems. It provides a 0–25 PSI adjustment range, a maximum inlet pressure of 300 PSI, and an approximate 110 SCFM flow capacity, with heavy-duty tee-handle adjustment, two 1/4 in NPT gauge ports, and a zinc body paired with Buna-N seals, an aluminum spring cage, and configuration-dependent brass or nylon bottom plugs. Commonly used in automation equipment, assembly lines, process control systems, air-operated tools, instrumentation panels, OEM machinery, and material handling equipment, it is suited for inline installation within industrial air preparation and pneumatic control systems across manufacturing facilities. Common replacements include Watts FluidAir R119-03C, R119-03CG, and R11-03A.