Johnson Controls V48AC-2 Regulating Valve

The Johnson Controls V48AC-2 is a heavy-duty, 3-way pressure actuated water regulating valve engineered for precision head pressure control in water-cooled condenser systems. Built with a rugged cast brass body, this valve is designed to handle non-corrosive refrigerants and maintain stable system performance in high-demand HVACR environments. It features a 3/4" NPT connection and is specifically calibrated for a high-pressure opening point range of 145 to 190 PSI, making it ideal for systems requiring elevated operating thresholds.

This Normally Closed (NC) side valve utilizes a Style 45 pressure element, consisting of a 30-inch capillary and a 1/4" flare nut for secure integration into your refrigerant line. The pressure-balanced design ensures that the HVAC water regulating valve provides smooth, modulating flow that is unaffected by fluctuations in water supply pressure. For the technician in the field, the V48AC-2 allows for easy manual flushing and range adjustment without requiring system shutdown, ensuring long-term reliability and simplified maintenance for industrial cooling towers and commercial refrigeration racks.

• Optimized Head Pressure: Maintains consistent refrigerant head pressure by modulating water flow between the condenser and bypass.
• Durable Construction: High-grade cast brass assembly resists corrosion and stands up to hydraulic shock.
• Precision Control: The Style 45 pressure element with internal bellows ensures fast, accurate response to pressure changes.
• Versatile Application: Designed for use in cooling tower systems, helping to prevent nozzle fouling by maintaining continuous water flow.
• Serviceability: Features an accessible adjustment screw for field-tuning the 145-190 PSI setpoint.

• How do I adjust the opening point? Use a standard service wrench to turn the adjustment screw at the top of the spring housing; clockwise lowers the setpoint, while counterclockwise raises it.
• Can this be used for salt water? No, this standard brass model is intended for non-corrosive fresh water; maritime versions are required for salt water applications.
• What is the maximum water pressure rating? This valve is designed to operate safely within standard commercial water systems, typically rated up to 150 PSI water pressure.

This item is not eligible for free shipping.

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.