Johnson Controls V47AS-1 Valve

The Johnson Controls V47AS-1 Valve is a heavy-duty temperature actuated water regulating valve engineered for demanding hydronic and industrial heating systems. As a direct acting, modulating water valve, it provides high-precision flow control of water or glycol solutions to maintain stable process temperatures. Built with a rugged cast iron body and a 2" ASME flange connection, this valve is designed for 150 psi maximum water pressure and is rated for a heating point range of 115 to 180 degrees F. The assembly features a Style 4 sensing bulb (11/16" diameter x 10" length) paired with a 6' capillary for flexible remote sensing, ensuring the internal valve orifice responds accurately to thermal fluctuations. Whether you are balancing a commercial boiler loop or managing industrial heat exchangers, the V47AS-1 provides the consistent temperature regulation required for system efficiency.

Key Benefits for Contractors

• Robust Flanged Construction: The 2-inch ASME flanged inlet and outlet allow for secure, leak-proof integration into high-capacity piping systems.
• Precise Thermal Response: Uses a direct acting mechanism that opens on temperature rise, making it ideal for cooling down overheated loops or maintaining specific setpoints.
• Application Versatility: Compatible with both water and glycol, spanning a wide 115°F to 180°F range for various HVACR heating applications.
• Easy Field Service: Features a 1/2" NPT external fitting and a removable bypass plug to simplify maintenance and system calibration.
• Industrial Durability: The cast iron construction is designed to withstand the stress of constant modulation in commercial environments.

Common Questions

What is the difference between direct acting and reverse acting for this model?
The V47AS-1 is direct acting, meaning the valve opens as the temperature at the bulb increases. This is the standard configuration for most temperature actuated modulating valves used in heating-limit applications. For systems requiring the valve to close on temperature rise, a reverse acting model would be necessary.

Can the capillary be shortened or modified if 6 feet is too long?
No, the 6' capillary is a sealed component containing a specific volatile charge. Cutting or kinking the capillary will destroy the temperature sensing capability and render the valve inoperable. Excess tubing should be carefully coiled and secured away from heat sources.

What media can be used with the V47AS-1?
This water regulating valve is specifically designed for use with water or inhibited glycol solutions. Using it with corrosive chemicals or steam without verifying metallurgy compatibility may lead to premature seal or body failure.

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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.