Johnson Controls V47AS-2 Valve

The Johnson Controls V47AS-2 is a heavy-duty, direct-acting temperature actuated water regulating valve designed for precision modulation in high-demand heating applications. Built with a rugged cast iron body and a 2" ASME flange connection, this valve is engineered to maintain setpoint integrity within a 160 to 205 degrees F heating point range. The V47AS-2 (identical to the V47AS-2C) utilizes a Style 4 temperature bulb measuring 11/16" in diameter and 10" in length, connected by a 6-foot capillary for flexible remote sensing. This two-way forward acting valve is a standard for contractors managing industrial heat exchangers and commercial cooling systems where reliable flow regulation based on thermal load is critical. The inclusion of a 1/2" NPT external fitting ensures straightforward integration into existing piping architectures, providing a robust solution for water-based HVAC systems requiring consistent modulating temperature control.

Technical Benefits for Contractors

• Optimized Thermal Regulation: The direct acting mechanism ensures immediate response to temperature fluctuations between 160°F and 205°F.
• Industrial Build Quality: High-grade cast iron construction provides the durability needed for high-pressure ASME flanged installations.
• Flexible Sensing: The 6-foot capillary and high-surface-area bulb allow for accurate temperature detection even in restricted equipment layouts.
• System Compatibility: Cross-compatible with V47AS-2C specifications, simplifying inventory and replacement parts sourcing.

Common Questions

Is the V47AS-2 suitable for steam applications?
This valve is specifically designed as a water regulating valve. For steam service, verify that the fluid medium and pressure ratings align with the cast iron body limits and temperature bulb tolerances.

How does the "forward acting" motion impact flow?
In this configuration, the valve is forward acting, meaning it opens on a temperature rise. This is typically used to increase cooling water flow to a heat exchanger as the process temperature increases.

Can the capillary tube be kinked during installation?
No, the 6-foot capillary must be handled carefully. Kinking or crushing the tube will obstruct the fluid expansion needed to actuate the valve, resulting in failure to modulate.

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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.