Johnson Controls V47AB-3 Regulating Valve

The Johnson Controls V47AB-3 is a temperature actuated water regulating valve specifically engineered for heating applications where precise temperature modulation is critical. This direct acting modulating valve features a 1/2" NPT connection and is designed to open on a temperature increase at the bulb, making it an essential component for maintaining optimal thermal balance in heat exchangers, large-scale air compressors, and hydraulic systems. Constructed from rugged cast brass, the valve is built to withstand high hydraulic shock and supply pressures up to 150 psig. The integrated sensing element features a 6-foot capillary and a Style 4 bulb (11/16" x 3 1/4") with a 1/2" NPT external fitting for secure immersion. By utilizing a pressure-balanced design and isolated range spring, the V47AB-3 water regulating valve ensures chatter-free operation and protects internal components from sedimentation and corrosion. Its 115 to 180 degrees F heating point range provides technicians with a reliable field-adjustable solution for demanding commercial HVACR environments.

Key Benefits

• Stable Thermal Regulation: The modulating water valve ensures consistent flow to maintain target temperatures between 115°F and 180°F.
• Enhanced Durability: The bellows-actuated design keeps the range spring isolated from the cooling water, preventing premature fatigue and mineral buildup.
• Anti-Hammer Technology: Engineered to minimize water hammer and chatter, ensuring quiet operation and protecting downstream piping.
• Simplify Maintenance: Features manual flushing capabilities to quickly clear debris from the valve seat without full disassembly.
• Pressure Independence: Valve modulation remains accurate despite fluctuations in water supply pressure.

Common Questions

What is the maximum bulb temperature for the V47AB-3?
The bulb can withstand a maximum temperature of 200°F. Exceeding this limit by more than 20°F above the range maximum may damage the sensing element.

How do I adjust the opening point on this valve?
Technicians can raise the opening point by turning the range adjusting screw counterclockwise; turning it clockwise lowers the point. Note that the 3-5°F differential (closing point) is factory-set and not adjustable.

Can this valve be used with fluids other than water?
While optimized for water, it is compatible with glycol solutions. For other non-corrosive liquids, verify material compatibility with the cast brass body and Buna-N diaphragms.

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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.