Watts R119-04C Air Reg.

For high-demand pneumatic systems requiring reliable pressure stabilization, the Watts R119-04C Air Regulator is a standard-tier industrial component engineered for precision. This 1/2 inch NPT pressure regulator balances high flow performance with a rugged zinc body, making it a staple for contractors managing compressed air lines. Featuring a diaphragm-operated design and a balanced poppet, the R119-04C ensures quick response times and accurate regulation even when your system faces wide variations in flow. With a 300 PSIG maximum inlet pressure and a 0-125 PSI reduced pressure range, this unit is optimized for industrial air preparation. The heavy-duty T-handle adjustment provides tactile control for setting precise secondary pressures. This model is a direct cross-reference replacement for the Barber Colman K-384, AL-484, and 0498400, allowing for seamless integration into existing HVACR and pneumatic assemblies without re-piping.

• Superior Flow Capacity: Delivers up to 150 SCFM, ensuring downstream tools and valves receive consistent air volume under load.
• Relieving Type Design: Automatically vents downstream overpressure for enhanced system safety and easier pressure downstream adjustments.
• Industrial-Grade Construction: Built with a durable zinc body, aluminum spring cage, and Buna-N seals for long-term reliability in mechanical rooms.
• Dual Gauge Ports: Includes two 1/4 inch NPT gauge ports for flexible monitoring configurations (plugs or gauges sold separately).

Is the Watts R119-04C compatible with Barber Colman K-384?
Yes, this unit is the designated technical replacement for the K-384 (32 CFM) and AL-484 models, offering superior flow characteristics and the same 1/2" porting.

What is the maximum operating temperature for this regulator?
This regulator is rated for a temperature range of 40°F to 120°F (4°C to 49°C), suitable for most indoor industrial air service environments.

Does this unit require a specific mounting orientation?
While it can be mounted in any position, it must be installed with the air flow following the direction of the arrow on the regulator body, ideally as close as possible to the device it serves.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.