Johnson Controls V47AC-4 Valve

The Johnson Controls V47AC-4 Valve is a temperature actuated water regulating valve engineered for critical heating and cooling applications where precise flow modulation is required. This direct acting valve is built with a rugged cast brass body and utilizes a pressure-balanced design to maintain setpoint accuracy regardless of inlet pressure fluctuations. Featuring a 3/4" NPT connection and a heating point range of 160 to 230 degrees F, it effectively regulates water or glycol flow to prevent overheating in heat exchangers, oil coolers, and industrial engines. The V47AC-4 includes a Style 4 temperature bulb (11/16" diameter x 3 1/4" long) with a 6' capillary for remote sensing. Designed to open on temperature increase, it eliminates chatter and water hammer via a proportioned diaphragm area. This V47 series modulating valve is technically identical to the V47AC-4C, ensuring seamless integration into existing HVACR systems requiring high-temperature setpoints.

• Enhanced Durability: The cast brass construction and corrosion-resistant bellows ensure a long service life in demanding mechanical room environments.
• Operational Stability: The pressure-balanced design minimizes seat hunting and ensures consistent flow modulation even during sudden pressure spikes.
• Simplified Maintenance: Features an easy manual flushing mechanism and a range spring isolated from the liquid stream to prevent sedimentation.
• Versatile Compatibility: Standard 3/4 inch NPT threading and a 1/2 inch NPT external fitting allow for straightforward installation in diverse piping systems.

• Is the V47AC-4 suitable for potable water applications? No, this unit is constructed from copper alloys containing lead and is intended for industrial refrigeration and HVAC process water only.
• What is the maximum bulb temperature for this valve? The sensing element should not be subjected to temperatures exceeding 20°F above the maximum 230°F range.
• How do I adjust the opening point? The opening point adjustment is performed using a standard service wrench on the adjusting screw located atop the spring housing.

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