The Parker Watts Fluid Air R119-04C 1/2" Air Regulator is a precision pressure control device that maintains consistent air pressure between 0–125 PSI for HVAC pneumatic systems. It regulates incoming compressed air to deliver stable pressure to actuators, valves, and controls, ensuring smooth operation. Commonly used in air-driven control systems, economizers, and damper actuators, i... https://www.partshnc.com/r119-04c-parker-watts-fluid-air-12-air-reg-0125