Description
Johnson Controls VG7241GS+3801B — 2-Way Normally Open Valve Assembly with Spring Return Pneumatic Actuator
The Johnson Controls VG7241GS+3801B is a factory-assembled, 2-way normally open control valve paired with a spring-return pneumatic actuator, engineered for precise flow regulation in commercial HVAC hydronic systems. The combination of a durable cast bronze body with brass trim and a reliable pneumatic actuator makes this assembly a trusted solution for heating and cooling coil applications, air handling units, and fan coil systems.
Valve Features
- Configuration: 2-Way, Normally Open (NO)
- Pipe size: 1/2″ NPT connection
- Flow coefficient: 4.6 Cv
- Flow characteristic: Equal Percentage — provides precise modulating control across the full stroke range
- Body material: Cast bronze for corrosion resistance and long service life
- Trim material: Brass for dependable sealing and durability
Pneumatic Actuator Features (3801B)
- Actuator type: Spring Return Pneumatic
- Spring range: 3–6 PSI — provides automatic fail-safe return to the normally open position on loss of air pressure
- Operation: Pneumatic signal modulates valve position; spring returns valve to open on air failure
- Designed for compatibility with standard pneumatic control systems
Applications
- Hydronic heating and cooling coil control
- Air handling units (AHUs) and fan coil units (FCUs)
- Commercial building HVAC systems with pneumatic controls
- Two-pipe and four-pipe hydronic systems
Why Choose the VG7241GS+3801B?
This factory-matched valve and actuator assembly from Johnson Controls eliminates the guesswork of field pairing, ensuring optimal performance and compatibility right out of the box. The equal percentage flow characteristic delivers stable, proportional control across varying load conditions, while the cast bronze body provides reliable service in demanding commercial environments. The spring-return pneumatic actuator ensures fail-safe normally open operation, protecting system components in the event of air supply loss.
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