V47AA-1C Johnson Controls MODULATING Valve

Overview

The Johnson Controls V47AA-1C is a commercial-grade, temperature-actuated modulating water valve designed to regulate the flow of water or glycol to maintain a desired temperature. Operating as a direct-acting device, the valve opens on a temperature increase at the sensing bulb, making it highly effective for heating and cooling applications that rely on precise thermal management.

Features

• Pressure-balanced valve design ensures the setpoint remains independent of water inlet pressure.
• No close-fitting sliding parts in water passages minimize hysteresis and prevent the valve from sticking due to contamination.
• Valve design minimizes chatter and water hammer for smooth operation.
• Easy manual flushing and an easily disassemblable body allow for simple in-line repairs and parts replacement.

Specifications

• Connection Size: 3/8 inch NPT, threaded
• Control Action: Direct acting (opens on temperature increase)
• Temperature Range: 115 to 180 °F
• Maximum Bulb Temperature: 200 °F (20 °F above temperature range)
• Maximum Supply Water Pressure: 150 psig
• Body Material: Cast brass/bronze
• Bulb Dimensions: 11/16 inch diameter x 3-1/4 inch length
• Capillary Length: 6 feet
• Bypass Orifice Diameter: 0.062 inch

Applications

• Heat Exchangers: Regulates cooling water to maintain optimal operating temperatures.
• Compressors and Engines: Controls jacket water and gas systems to prevent overheating.
• Hydraulic Systems: Regulates oil cooling loops to protect pumps and fluid integrity.
• Industrial Printing: Stabilizes ink and paint temperatures for consistent quality.
• Condenser and Water Conservation: Used in systems where expensive fluids are recovered or where cooling water usage is restricted, such as swimming pool temperature regulation.