Schneider Electric VK4-7223-203-4-3 1/2" Normally Closed Control Valve with Positioner

The Schneider Electric (Barber Colman) VK4-7223-203-4-3 is a professional-grade pneumatic control valve designed for HVAC and building automation systems. This 1/2-inch normally closed (N/C) valve features a spring-operated actuator with a 3-7 PSI operating pressure range, providing reliable modulating control for heating and cooling applications.

Key Specifications:

• Valve Size: 1/2 inch NPT female connections
• Valve Configuration: Normally closed (N/C) - closes on loss of air pressure
• Operating Pressure Range: 3-7 PSI pneumatic signal
• Flow Coefficient (Cv): 2.2 for precise flow control
• Integrated positioner for accurate valve positioning and feedback
• Durable brass valve body construction for long service life
• Spring return actuator for fail-safe operation

This valve is ideal for use in hydronic heating and cooling systems, chilled water applications, and other commercial HVAC control scenarios where precise flow modulation is required. The integrated positioner ensures accurate valve positioning in response to pneumatic control signals from building automation systems. The normally closed configuration provides fail-safe protection by shutting off flow when control air pressure is lost.