VG7251GS+3801B Johnson Controls Valve / Actuator

Overview

The Johnson Controls VG7251GS+3801B is a 1/2-inch 2-way union globe valve assembly designed for precise flow control in commercial HVAC applications. It features a cast bronze body with brass/stainless steel trim paired with a V-3801 compact pneumatic actuator, operating in a normally open configuration. Its compact footprint makes it highly efficient for installation in tight spaces.

Features

• Compact design ideal for confined spaces such as baseboard radiators and convectors
• Rugged die-cast aluminum actuator enclosure with an enclosed spring
• 2-way normally open configuration for reliable fail-safe operation
• Equal percentage flow characteristic for stable control

Specifications

• Valve Size: 1/2 inch
• Connection Type: Union Globe End (NPT)
• Flow Coefficient (Cv): 4.6
• Spring Range: 3 to 6 psi
• Static Pressure Rating: ANSI Class 250
• Close-off Pressure: 105 psig
• Fluid Temperature Range: 35°F to 248°F (2°C to 120°C)
• Actuator Operating Temperature: -20°F to 150°F (-29°C to 66°C)

Applications

• Designed for precise fluid and flow regulation in HVAC and building automation systems
• Suitable for baseboard radiators, convectors, and hydronic heating or cooling loops
• Compatible with hot water, chilled water, glycol solutions, and low-pressure steam applications up to 15 psig