Description
Product Overview
The Schneider Electric (Barber Colman) VK-7211-201-4-4 is a complete valve and actuator assembly designed for precise flow control in commercial HVAC hydronic systems. This factory-matched combination pairs a 2-way, normally open bronze body globe valve with a 3–7 PSI spring return pneumatic actuator, delivering reliable, fail-safe operation in heating and cooling applications.
Valve Specifications
- Configuration: 2-Way, Normally Open (NO)
- Pipe Size: 1/2 inch
- End Connections: NPT x Union
- Flow Coefficient: 4.4 Cv
- Flow Characteristic: Equal Percentage
- Body Material: Bronze
- Trim Material: Brass
- Valve Type: Globe Valve
Actuator Specifications
- Actuator Type: Spring Return Pneumatic
- Control Signal: 3–7 PSI pneumatic input
- Fail-Safe Action: Spring return to normally open position on loss of air pressure
Key Features & Benefits
- Factory-assembled valve and actuator combination for simplified installation
- Equal percentage flow characteristic provides precise, proportional flow control across the full operating range
- Normally open fail-safe design ensures system protection on loss of pneumatic signal
- Bronze body construction offers excellent corrosion resistance for hydronic water service
- Brass trim for durability and long service life
- NPT x Union end connections allow for easy field installation and future serviceability
- Spring return pneumatic actuator provides reliable, repeatable positioning
- Compatible with standard 3–7 PSI pneumatic control systems common in commercial building automation
Typical Applications
- Commercial HVAC hydronic heating and cooling coil control
- Fan coil unit (FCU) water flow regulation
- Air handling unit (AHU) heating and cooling coil service
- Pneumatically controlled building automation systems
- Hot water and chilled water distribution systems
