Description
The Johnson Controls VG7842NT+3008D is a complete 3-way mixing valve assembly engineered for precise hydronic flow control in commercial HVAC and building automation systems. Combining a robust cast bronze valve body with a spring return exposed pneumatic actuator, this assembly delivers reliable, repeatable performance in heating and cooling applications where accurate mixing or diverting of fluid streams is essential.
Valve Body Features
- 3-way mixing configuration for blending or diverting fluid flow
- 1″ NPT end connections for straightforward pipe installation
- 11.6 Cv flow coefficient for accurate sizing in hydronic systems
- Linear flow characteristic for proportional control response
- Cast bronze body construction for corrosion resistance and long service life
- Brass trim components for durability and compatibility with hydronic fluids
Pneumatic Actuator Features
- Spring return design ensures fail-safe positioning on loss of air signal
- 4–8 PSI spring range for compatibility with standard pneumatic control systems
- Exposed actuator design for easy visual inspection and field adjustment
- Direct-coupled to valve body for a pre-assembled, ready-to-install configuration
Applications
- Hydronic heating and cooling coil control
- Chilled water and hot water mixing systems
- Commercial building automation and pneumatic control systems
- Fan coil units, air handling units, and terminal equipment
Why Choose the Johnson Controls VG7842NT+3008D?
This factory-assembled valve and actuator combination simplifies installation and ensures optimal compatibility between components. The cast bronze body and brass trim provide excellent resistance to corrosion in closed-loop hydronic systems, while the linear flow characteristic allows for smooth, proportional control. The spring return pneumatic actuator provides dependable fail-safe operation, making this assembly a trusted solution for mission-critical HVAC control applications.
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