Johnson Controls V47AB-27 Regulating Valve

The Johnson Controls V47AB-27 is a heavy-duty, direct acting temperature actuated water regulating valve designed specifically for demanding HVACR and industrial applications. Built with a rugged cast brass body, this 1/2" NPT valve excels in maintaining precise setpoints by modulating water or glycol flow in response to temperature changes at the sensing bulb. Featuring a 40 to 85 degrees F cross ambient point range, it is engineered for systems where the bulb temperature may fluctuate above or below the valve body temperature without losing control accuracy. The assembly includes a high-sensitivity 11/16" diameter by 10" long Style 1 bulb connected via a 4' capillary, ensuring reliable thermal response for heat exchangers, hydraulic oil cooling, and air compressor circuits. As a modulating water valve, it opens on temperature increase to provide efficient cooling and water conservation. Note that this specific configuration does not include 1/2" external NPT fitting components for the bulb immersion.

Key Benefit List:

• Precise Thermal Modulation: Utilizes a temperature actuated design to maintain tight system tolerances, preventing liquid-hammer through smooth, proportional flow Control.
• Debris-Resistant Internals: Engineered with no close-fitting sliding parts in the water passages, reducing the risk of HVAC valve sticking or hysteresis caused by sediment.
• Extreme Durability: The cast brass construction and pressure-balanced design allow the valve to withstand high hydraulic shock and varying inlet pressures.
• Maintenance Friendly: Features a manual flushing mechanism that allows technicians to clear out mineral deposits without disturbing the opening point settings.
• Application Versatility: Ideal for cooling water regulation in condenser applications, industrial printing machines, and engine cooling systems.

Common Questions:

How do I adjust the opening point on the V47AB-27?
The opening point is field-adjustable by turning the screw located at the top of the range spring housing. Use a standard service wrench to set the temperature at which the valve starts to modulate flow.

Can this valve be used for sea water applications?
For sea water or corrosive fluids, a version with a naval bronze body and monel internal parts is typically required. Standard V47 series cast brass valves are intended for fresh water and glycol solutions.

Does the V47AB-27 close on temperature increase?
No, this is a direct-acting model, meaning it opens on temperature increase. It is primarily used for cooling applications to increase water flow as the equipment temperature rises.

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.