Description
The Johnson Controls V47AC-29 is a temperature-actuated modulating water valve engineered for precise, self-powered flow control in hydronic heating and cooling systems. Featuring a 3/4″ valve body and a sensing bulb measuring 11/16″ in diameter by 3-1/4″ in length, this valve responds directly to fluid temperature changes — no external power source required — making it an exceptionally reliable choice for a wide range of commercial and residential hydronic applications.
With an operating temperature range of 115°F to 180°F, the V47AC-29 is ideally suited for hot water heating systems, heat exchangers, fan coil units, and unit heaters where accurate temperature-based flow modulation is essential. As fluid temperature rises or falls within the set range, the valve modulates water flow proportionally to maintain system setpoint, improving comfort and energy efficiency.
Key Features
- Temperature-actuated, self-powered operation — no external power required
- 3/4″ valve body for compatibility with standard hydronic piping
- Operating temperature range: 115°F to 180°F
- Sensing bulb dimensions: 11/16″ diameter x 3-1/4″ length
- Modulating control for smooth, proportional flow adjustment
- Eliminates on/off cycling for improved system efficiency and comfort
- Compact, durable construction suited for commercial and residential use
Typical Applications
- Hydronic hot water heating systems
- Fan coil units and unit heaters
- Heat exchangers and boiler systems
- Domestic hot water temperature regulation
- Industrial process temperature control
Why Choose the Johnson Controls V47AC-29?
The V47 Series from Johnson Controls is a trusted line of self-contained, temperature-actuated valves that deliver dependable modulating performance without the complexity or cost of electrically actuated alternatives. The V47AC-29 offers contractors and system designers a straightforward, low-maintenance solution for maintaining precise water temperatures in hydronic systems. Its self-powered design reduces wiring requirements and simplifies installation, while the modulating action helps extend equipment life by avoiding the thermal shock associated with two-position valves.
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