Johnson Controls V47AC-8 Valve

The Johnson Controls V47AC-8 Valve is a professional-grade direct acting temperature actuated water regulating valve specifically engineered for heating applications where precise fluid control is critical. Featuring a 3/4" NPT threaded connection and a robust cast brass body, this valve is designed to sense temperature increases at the Style 4 bulb and modulate water or glycol flow accordingly to maintain system setpoints. It operates within a heating point range of 75 to 135 degrees F, making it an ideal choice for heat exchangers, engine cooling systems, and industrial process control. The inclusion of a 6' capillary provides the flexibility needed for remote sensing in complex mechanical rooms. Built to handle a maximum supply water pressure of 150 psig, the V47AC-8 utilizes a pressure-balanced design with rubber diaphragms to protect internal springs and sliding parts from sedimentation and corrosive scale, ensuring reliable performance in demanding hydronic environments. This model is technically identical to the V47AC-8C.

• Precise Modulation: Direct-acting logic ensures the valve opens consistently as bulb temperature rises, providing accurate thermal regulation for HVAC water regulation.
• Corrosion Resistance: The cast brass construction and unique diaphragm seal prevent water from contacting the range spring, mitigating mineral buildup and mechanical binding.
• Reduced Maintenance: Designed without close-fitting sliding parts in the water passages, this valve significantly minimizes the risk of chatter, water hammer, and localized clogs.
• Field Adjustability: Features an accessible adjusting screw for fine-tuning the opening point, allowing technicians to calibrate the direct acting valve to specific site conditions.
• Industrial Durability: Capable of withstanding high hydraulic shock and operating in systems with up to 150 psig supply pressure.

What is the difference between the V47AC-8 and the V47AC-8C?
Technically, these two parts are identical. The "C" suffix often denotes commercial packaging or minor regional SKU variations, but the technical specifications and physical dimensions remain the same.

Can this valve be used for cooling applications instead of heating?
No. The V47AC-8 is a direct acting valve designed for heating, meaning it opens as temperature increases. For cooling applications where the valve must open as temperature decreases, a reverse-acting model would be required.

What is the proper mounting orientation for the V47 series?
For optimal performance and to ensure the bellows do not trap air or sediment, the valve should be mounted vertically with the bellows facing downward and the spring housing at the top.

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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.