Description
Overview
The Johnson Controls VG7241CS+3801B is a factory-assembled, 2-way normally open globe valve and spring return pneumatic actuator combination designed for precise flow control in commercial HVAC hydronic and steam systems. The cast bronze body with brass trim provides excellent corrosion resistance and long service life, while the equal percentage flow characteristic delivers stable, responsive control across the full range of valve travel.
Valve Features
- 2-way, normally open (N/O) configuration
- 1/2″ NPT end connections for easy pipe installation
- 0.73 Cv flow coefficient for accurate, low-flow applications
- Equal percentage flow characteristic for stable modulating control
- Cast bronze body construction for durability and corrosion resistance
- Brass trim for reliable seating and long cycle life
Pneumatic Actuator Features
- Spring return pneumatic actuator (Model 3801B)
- 3–6 PSI spring range for fail-safe, normally open operation
- Spring return action ensures valve returns to open position on loss of air signal
- Factory-mounted and calibrated for reliable out-of-box performance
Applications
- Commercial HVAC hydronic heating and cooling systems
- Fan coil unit and air handling unit control
- Pneumatically controlled building automation systems
- Hot water and chilled water coil control
Why Choose the VG7241CS+3801B
This pre-assembled valve and actuator package from Johnson Controls simplifies installation and ensures proper component matching. The equal percentage flow characteristic provides excellent controllability at partial loads — ideal for variable flow hydronic systems. The spring return pneumatic actuator offers a reliable fail-safe open position, protecting coils and system components in the event of air supply loss.
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