Johnson Controls V46AS-2 Regulating Valve

The Johnson Controls V46AS-2 Regulating Valve is a heavy-duty, direct-acting solution designed for precise head pressure control in high-capacity water-cooled condenser systems. Built with a rugged cast iron body and a 2" ASME four-hole flange, this pressure actuated water regulating valve is engineered to withstand demanding commercial environments. It features a high opening point range of 160 to 260 PSI, making it compatible with high-pressure, non-corrosive refrigerants like R-22 and R-410A. The integration of a Style 5 pressure element with a 1/4" external flare fitting ensures rapid response to refrigerant fluctuations, maintaining stable condensing temperatures even under varying heat loads. By modulating water flow based on direct compressor discharge pressure, the V46AS-2 prevents system cycling and optimizes overall refrigeration efficiency. Its pressure-balanced design ensures that the water flow regulation remains consistent regardless of sudden fluctuations in the water supply pressure.

• High-Range Performance: Specifically calibrated for an opening range of 160 to 260 PSI to handle modern high-pressure refrigerant applications.
• Standard Flow Capacity: The 2-inch flanged connection supports high-volume water throughput for large-scale commercial condensers and chillers.
• Balanced Valve Design: Eliminates setpoint drift caused by varying inlet water pressures, ensuring reliable operation in unstable municipal water systems.
• Field Serviceability: Designed for easy maintenance with an accessible range spring and take-apart construction that allows for internal inspections without removing the body from the line.
• Internal Durability: Features corrosion-resistant internal components and a robust bellows assembly capable of withstanding significant hydraulic shock and high ambient temperatures.

What is the difference between direct-acting and reverse-acting V46 valves?
Direct-acting models like the V46AS-2 open on an increase in refrigerant pressure to provide more cooling water to the condenser. Reverse-acting models close on pressure increase and are typically utilized for bypass or specialized heat pump applications.

Is this valve compatible with seawater applications?
No. This specific model features a cast iron body intended for standard water and glycol mixtures. For maritime or corrosive salt-water environments, a bronze-body version with monel trim (Maritime Type) is required.

How do I adjust the opening point of the valve?
The opening point is adjusted using the range screw located at the top of the valve. Turning the screw clockwise lowers the opening point, while counterclockwise increases it. It is recommended to set the opening point approximately 7 PSI above the refrigerant pressure equivalent of the highest ambient temperature expected during the off-cycle.

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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.