Watts FluidAir R119-03A Pneumatic Pressure Regulator

Description:

The Watts FluidAir R119-03A M3 Pneumatic Pressure Regulator is a 3/8 inch NPT air regulator designed to provide accurate and stable downstream pressure control in compressed air systems. Featuring a low-pressure adjustment range of 0–25 PSI, it automatically reduces incoming air pressure to a controlled level, protecting downstream pneumatic equipment and ensuring consistent operation. It is commonly installed in manufacturing facilities, automation systems, pneumatic control panels, packaging machinery, instrumentation systems, and industrial compressed air networks.

Applications:

The Watts FluidAir R119-03A M3 is widely used in pneumatic automation equipment, assembly lines, process control systems, air-operated tools, instrumentation panels, OEM machinery, material handling equipment, and manufacturing plants. Its diaphragm-operated, relieving design provides fast response and precise pressure regulation, helping improve equipment performance and extend the service life of downstream valves, cylinders, actuators, and other pneumatic components. It is particularly well suited for applications requiring low-pressure air control in the 0–25 PSI range.

Technical Specifications:

• Manufacturer Part Number (MPN): R119-03A M3
• Brand: Watts FluidAir / Parker
• Product Type: Pneumatic Pressure Regulator
• Series: R119
• Connection Size: 3/8 in. NPT
• Connection Type: Female NPT Threaded
• Pressure Adjustment Range: 0–25 PSI
• Maximum Inlet Pressure: 300 PSI
• Flow Capacity: Approximately 110 SCFM
• Regulator Type: Relieving
• Adjustment Style: Heavy-Duty Tee Handle
• Gauge Ports: Two 1/4 in. NPT
• Body Material: Zinc
• Bottom Plug Material: Brass or Nylon (configuration dependent)
• Spring Cage Material: Aluminum
• Seal Material: Buna-N
• Operating Temperature Range: 40°F to 125°F (4°C to 52°C)
• Service Media: Compressed Air
• Function: Downstream Air Pressure Regulation
• Installation: Inline Pneumatic Systems
• Application: Industrial Air Preparation and Pneumatic Control Systems

Common Replacements:

• Watts FluidAir R119-03C 
• Watts FluidAir R119-03CG 
• Watts FluidAir R11-03A