Johnson Controls V47AC-39 Water Valve

The Johnson Controls V47AC-39 is a heavy-duty, temperature actuated modulating water valve designed specifically for heating applications requiring precise thermal regulation. Featuring a 3/4 inch NPT connection and a broad 160-230 degree range, this valve effectively manages the flow of water or glycol to maintain consistent operating temperatures in heat exchangers, large internal combustion engines, and industrial air compressors. As a veteran-grade PENN V47 series component, it utilizes a pressure-balanced design with synthetic rubber diaphragms to ensure the setpoint remains stable despite fluctuating inlet water pressures. The 6-foot capillary and heating bulb are engineered with a "bulb-higher-than-bellows" requirement to prevent refrigerant migration and ensure responsive modulation. Because the range spring and sliding mechanics are isolated from the process fluid, the V47AC-39 significantly reduces the risk of scale build-up and mechanical sticking commonly found in inferior HVAC water regulating valves.

• Stable Thermal Regulation: The modulating water valve sensitivity ensures smooth temperature transitions without the rapid cycling that leads to premature wear.
• Debris Resistance: Designed without close-fitting sliding parts in the flow path to minimize clogging and hysteresis from sediment or mineral deposits.
• High Flow Efficiency: The 3/4" angled body provides a high Kv value, delivering superior flow capacity within a compact physical footprint.
• Hydraulic Protection: Built-in protection against water hammer and high-pressure surges prevents system damage during sudden flow changes.
• Field Serviceable: All internal components can be replaced in-line, allowing for rapid repairs without complete pipe disassembly.

What is the action of the V47AC-39 valve?
This specific model is designed to open on temperature increase at the sensing bulb, making it ideal for cooling high-temperature equipment or discharging heat from a system.

Can this valve be used with automotive fluids?
Yes, the Johnson Controls V47AC-39 is frequently used to maintain optimum temperatures for hydraulic oil and internal combustion engines, provided the fluid is compatible with the brass and synthetic diaphragm materials.

Is a bypass orifice included?
Typically, these valves feature a removable bypass plug that can be swapped for a specific orifice to maintain a minimum flow even when the valve is technically "closed."

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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.