Schneider Electric VK-7211-203-3-4 Pneumatic Globe Valve Assembly 1/2" Union Angle 8-13 PSI

The Schneider Electric VK-7211-203-3-4 is a 2-way pneumatic globe valve assembly designed for precise control of chilled water, hot water, or steam in HVAC applications. This 1/2-inch union angle valve features a normally open configuration with stem-up-open action, making it ideal for both two-position on/off control and proportional modulating applications.

Key Specifications:

• Body Size: 1/2 inch NPT union angle connection
• Flow Coefficient: 5.0 Cv for efficient fluid control
• Actuator: MK-2690 pneumatic spring return actuator
• Spring Range: 8-13 PSIG (blue spring)
• Close-Off Pressure: 90 PSI maximum
• Valve Body: VB-7211 series bronze construction
• Trim Material: Brass with soft seat for tight shutoff
• Linkage: AV-7400 valve linkage assembly
• Air Connection: 1/8 inch FNPT
• Temperature Rating: Water 20°F to 281°F (-7°C to 138°C), steam to 281°F (138°C)

Features and Benefits:

• High rangeability precision plug provides fine control for efficient, responsive regulation
• Soft seating ensures tight sealing with ultra-low energy leakage on shutoff
• Spring return fail-safe operation returns valve to normally open position on loss of air pressure
• Linear mechanical movement for smooth, precise control
• NEMA 1 protection rating suitable for indoor HVAC installations
• Meets ANSI, PED, ASTM, and CRN standards for safety and reliability

This pre-assembled valve and actuator combination is ready to install, eliminating field assembly requirements. The VB-7211 series valves are known for their long history of quality and reliability in commercial HVAC and building automation systems.