Johnson Controls V48AB-2 Regulating Valve

The Johnson Controls V48AB-2 Regulating Valve is a technical-grade 3-way water regulating valve precision-engineered for cooling tower systems and condenser applications. This pressure-actuated water valve features a 1/2" NPT connection and is designed for use with non-corrosive refrigerants such as R-22 and R-500. Constructed with a rugged cast brass body, the V48AB-2 maintains an opening point range of 145 to 190 PSI on the normally closed side, ensuring precise head pressure control. The internal pressure-balanced design utilizes high-quality rubber sealing diaphragms to achieve stability against water pressure fluctuations while protecting the range spring from sedimentation and corrosion. The unit is equipped with a 30-inch capillary and a 1/4" flare nut (Style 45) pressure element for reliable high-side sensing. This valve is essential for technicians managing condenser head pressure in diverse HVACR environments to prevent compressor inefficiency and ensure optimal refrigerant cycle performance.

Key Benefits:

• Optimized Tower Efficiency: Designed for single or multiple condenser hook-ups to maximize cooling tower performance.
• Pressure-Balanced Internals: Features rubber diaphragms that balance the valve against sudden pressure changes, preventing internal water submersion of mechanical parts.
• Field Serviceable: Engineered for maintenance with replaceable sensing elements and internal seat kits for extended component life.
• Broad Refrigerant Compatibility: Suitable for use in standard high-pressure systems utilizing non-corrosive refrigerants.
• Precise Adjustment: Includes an easily accessible adjustment screw for fine-tuning the 145 to 190 PSI opening point in the field.

Common Questions:

• How do you adjust the opening point on the V48AB-2? The opening point is modified by turning the adjustment screw on the top of its range spring housing using a standard service wrench.
• Can this valve be used for potable water systems? No, this valve is manufactured from a copper alloy and is not rated for drinking water applications.
• What is the purpose of the 3-way configuration in this model? The 3-way design allows the valve to bypass water around the condenser to the tower during low-load conditions, maintaining stable head pressure.

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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.