Description
The Johnson Controls V47AB-28 is a temperature-actuated modulating water valve engineered for precise flow control in hydronic heating and cooling systems. Responding directly to sensed fluid temperature — with no external power required — this self-contained valve continuously modulates water flow to maintain system setpoints and maximize comfort and efficiency.
Key Features
- Self-actuating, temperature-driven modulating control — no external power source required
- 1/2″ valve body for compatibility with standard hydronic piping configurations
- Operating temperature range of 75°F to 135°F for broad hydronic application coverage
- 11/16″ x 3-1/4″ sensing bulb provides accurate, responsive temperature detection
- Modulating action delivers smooth, continuous flow adjustment to prevent temperature swings
- Compact, durable construction suited for commercial and light industrial hydronic systems
Product Specifications
- Brand: Johnson Controls
- Model / SKU: V47AB-28
- Valve Size: 1/2″
- Temperature Range: 75°F – 135°F
- Bulb Dimensions: 11/16″ diameter x 3-1/4″ length
- Actuation Type: Temperature actuated (self-contained)
- Control Action: Modulating
- Media: Water / hydronic fluid
Typical Applications
- Hydronic heating and cooling coil control
- Hot water heating systems requiring proportional flow regulation
- Fan coil units and unit ventilators
- Commercial HVAC water distribution systems
The V47AB-28 is an ideal drop-in solution for installers and engineers seeking reliable, self-contained temperature-actuated modulation without the complexity of electric or pneumatic actuators. Its proven Johnson Controls design ensures long service life and dependable performance across a wide range of hydronic applications.
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