The Johnson Controls V47AB-5 is a direct acting temperature actuated water regulating valve engineered for precision flow control in refrigeration and HVAC systems. Featuring a 1/2" NPT connection and a robust cast brass body, this valve is designed to modulate water flow through a condenser based on sensing bulb temperature. The cross ambient point range of 75 to 135 degrees Fahrenheit ensures stability across varying ambient conditions, preventing fluctuations in head pressure. This model utilizes a Style 4 sensing bulb (11/16" x 10") with a 6-foot capillary and a 1/2" NPT external fitting, providing ample reach for remote mounting. The internal bellows assembly is built to withstand high-pressure water systems, ensuring reliable condenser water regulation without constant manual adjustment. Contractors favor the V47 series for its high-flow capacity and seat design, which resists mineral buildup and debris interference in open or closed-loop cooling applications. Key Benefits Precision Temperature Control: Maintains optimal head pressure by modulating water flow within a 75°F to 135°F range. Durable Construction: The cast brass valve body and corrosion-resistant internal components ensure longevity in harsh mechanical rooms. Versatile Compatibility: The 1/2" NPT sizing and Style 4 bulb configuration allow for standard integration into existing HVACR piping systems. High Sensitivity: The 6-foot capillary and liquid-filled bulb provide rapid response to temperature changes, protecting compressor efficiency. Ease of Service: Designed with a field-adjustable set point screw for fine-tuning performance based on specific site requirements. Common Questions How do I adjust the set point on the V47AB-5? Adjustments are made via the range screw located at the top of the valve. Turning the screw clockwise increases the temperature at which the valve begins to open, allowing for precise calibration to the condenser's requirements. Can this valve be used for heating applications? The V47AB-5 is a direct-acting valve, meaning it opens on a rise in temperature. While primarily used for water-cooled condensers, it is suitable for any cooling application requiring increased flow as temperature climbs. What mounting orientation is recommended for the sensing bulb? For accurate sensing, the Style 4 bulb should be fully immersed in the medium being measured. Ensure the capillary is protected from vibration and sharp bends to maintain the integrity of the thermal charge. 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.
