Description
Overview
The Schneider Electric (Barber Colman) VK-7211-201-4-2 is a complete valve and actuator assembly engineered for precise flow control in commercial HVAC hydronic and pneumatic systems. This factory-matched assembly pairs a 2-way, normally open bronze body globe valve with a spring return pneumatic actuator, delivering reliable, repeatable performance in heating and cooling applications.
Valve Features
- Configuration: 2-Way, Normally Open (N/O)
- Pipe Size: 1/2″ with NPT x Union end connections for easy installation and serviceability
- Flow Coefficient: Cv = 1.3 for accurate flow sizing
- Flow Characteristic: Equal Percentage — ideal for precise modulating control across a wide load range
- Body Material: Bronze for excellent corrosion resistance in hydronic systems
- Trim Material: Brass for durability and long service life
- Valve Style: Globe valve design for tight shutoff and smooth modulation
Pneumatic Actuator Features
- Actuator Type: Spring Return Pneumatic
- Control Signal Range: 3–7 PSI
- Spring return action ensures fail-safe positioning on loss of air signal
- Factory-matched to the valve body for optimized performance and simplified installation
Applications
- Commercial HVAC hydronic heating and cooling coil control
- Fan coil unit and air handling unit water-side control
- Pneumatic building automation and control systems
- Two-pipe and four-pipe hydronic systems requiring modulating flow control
Why Choose the VK-7211-201-4-2
As a pre-assembled, factory-matched valve and actuator package, the VK-7211-201-4-2 eliminates field-matching guesswork and reduces installation time. The equal percentage flow characteristic provides excellent controllability at partial load conditions — the most common operating point in HVAC systems. The bronze body and brass trim construction ensure long-term reliability in closed-loop hydronic systems, while the NPT x union connections allow for straightforward installation and future valve servicing without cutting pipe.
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