Johnson Controls V47AB-4 Valve

The Johnson Controls V47AB-4 is a direct acting temperature actuated water regulating valve engineered for precision sensing in heating applications. This 1/2 inch NPT cast brass valve features a heating point range of 160 to 230 degrees F, making it a reliable solution for maintaining specific discharge water temperatures in heat exchangers and cooling towers. The assembly includes a Style 4 sensing bulb (11/16" diameter by 3-1/4" length) and a 6-foot capillary for flexible positioning in demanding mechanical rooms. As a direct-acting component, the V47AB-4 opens on a temperature rise, ensuring consistent fluid bypass or flow regulation. This model is technically identical to the V47AB-4C, allowing for seamless field replacement without repiping. Its rugged construction resists corrosion and provides long-term stability in commercial hydronic systems where accurate temperature control valves are essential for operational efficiency and equipment protection.

• Rugged Material: High-grade cast brass body provides durability and resistance to mineral buildup in hard water conditions.
• Precise Sensing: The 6-foot capillary and Style 4 bulb deliver high-sensitivity thermal response to fluctuating system temperatures.
• Standardized Threading: The 1/2" NPT external fitting ensures compatibility with standard commercial pipe layouts.
• Direct Acting Logic: Designed to prioritize flow as temperatures increase, protecting systems from overheating.
• Interchangeable Specs: Fully replaces the V47AB-4C, simplifying inventory and procurement for service contractors.

Is the V47AB-4 suitable for steam applications?
No, this valve is specifically designed for water regulating services within its 160°F to 230°F setpoint range and should not be used in high-pressure steam lines.

Does this valve require an external power source?
The Johnson Controls V47 series is self-contained and temperature-actuated, utilizing a vapor-charged bulb to physical move the valve trim without the need for electricity.

Can I install the sensing bulb in any orientation?
For maximum accuracy and response time, the Style 4 bulb should be fully immersed in the fluid flow, ideally in a horizontal position or with the capillary pointing upward to ensure proper fluid expansion.

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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.