VG7842ES+3801B Johnson Controls Valve / Actuator

Overview

The Johnson Controls VG7842ES+3801B is a factory-assembled actuated valve combination featuring a 1/2-inch 3-way mixing bronze globe valve paired with a V-3801 compact pneumatic actuator. Designed for commercial HVAC and building automation systems, this assembly provides reliable, linear flow control of hot water, chilled water, glycol solutions, or low-pressure saturated steam. Its compact footprint makes it ideal for installation in tight mechanical spaces, such as baseboard radiators and convectors.

Features

• Compact design fits easily into tight configurations and space-constrained environments.
• Rugged actuator features a die-cast enclosure with an enclosed spring for added durability.
• Long-life replaceable ring pack packings deliver industry-leading reliability and service life.
• Every valve is factory-tested for tight shutoff to support energy conservation and comfort.
• Built with a standard small bonnet and slotted stem design for simplified field servicing.

Specifications

• Valve Size: 1/2 inch
• Connection Type: NPT (Threaded)
• Piping Configuration: 3-Way Mixing
• Flow Capacity: 1.8 Cv
• Flow Characteristic: Linear
• Body Material: Cast Bronze with Brass Linear Trim
• Actuator Type: V-3801 Compact Pneumatic Actuator
• Actuator Spring Range: 3 to 6 psig
• Effective Diaphragm Area: 4 sq. in.
• Maximum Static Pressure: 400 psi (ASME Class 250)
• Maximum Supply Air Pressure: 25 psig
• Fluid Temperature Range: 35°F to 248°F (2°C to 120°C)
• Maximum Steam Pressure: 15 psig saturated steam

Applications

• Hydronic heating and cooling systems in commercial buildings.
• Control of hot water, chilled water, and glycol solutions.
• Low-pressure steam applications up to 15 psig.
• Baseboard radiators, convectors, and zone control loops within building automation networks.