Schneider Electric VK4-7223-203-4-4 Pneumatic Globe Valve Assembly with Positioner

The Schneider Electric VK4-7223-203-4-4 is a 2-way normally closed pneumatic globe valve assembly designed for control of chilled water, hot water, or steam in HVAC applications. This valve features a 1/2-inch threaded NPT connection, 4.4 Cv flow coefficient, brass trim with soft seats, and a pneumatic actuator with an 8 to 13 psig spring range.

Key Features:

• 1/2-inch NPT threaded connection with 6 sq. in. diameter actuator and 1/2-inch stroke
• 4.4 Cv flow capacity for precise flow control
• Normally closed (N/C) configuration - fails closed on loss of air pressure
• 8 to 13 psig pneumatic spring range for proportional control
• Brass trim with soft seats and 1/8-inch FNPT air connections
• Integrated positive positioner (W/POS) for accurate valve positioning
• Bronze body construction from the VB-7XXX series
• NEMA 1 enclosure rating for indoor applications

This valve assembly comes pre-assembled with the pneumatic actuator and positioner, ready for installation. The positive positioner provides enhanced control accuracy by ensuring the valve position corresponds precisely to the control signal. Operating temperature range of -20 to 220°F (-29 to 104°C) makes it suitable for a wide variety of HVAC applications. The VK4 series is part of Schneider Electric's legacy Barber Colman product line, known for reliability in commercial building automation systems.