VG7251ES+3801B Johnson Controls Valve / Actuator

Overview

The Johnson Controls VG7251ES+3801B is a 1/2-inch pneumatic control valve and actuator assembly designed to accurately regulate the flow of hot water, chilled water, or up to 15 psig saturated steam in heating, ventilating, and air conditioning systems. This assembly pairs a VG7000 Series bronze control valve with a V-3801 compact pneumatic actuator, offering an excellent price-to-performance ratio for commercial building environments. Housed in a compact design, it easily fits into tight spaces while providing reliable, long-term operational efficiency.

Features

• Compact design allowing for easy installation in confined spaces such as baseboard radiators and convectors
• Rugged actuator die-cast enclosure featuring an enclosed spring for enhanced durability and safety
• Standardized bonnet and stem design facilitating straightforward field retrofits or mounting adjustments
• High-quality cast bronze body pattern with reliable brass trim and a stainless steel stem

Specifications

• Pipe Size: 1/2 inch
• Connection Type: NPT Threaded / Union Angle
• Body Pattern: 2-Way
• Flow Characteristic: Equal Percentage
• Flow Capacity: 1.8 Cv
• Actuator Type: Pneumatic
• Fail-Safe Mode: Spring Normally Open
• Spring Range: 3 to 6 psig
• Maximum Static Pressure: 400 psi
• Maximum Supply Air Pressure: 25 psig
• Medium Temperature Range: 35°F to 248°F (2°C to 120°C)

Applications

• Commercial HVAC systems for precise environmental control
• Hydronic heating and cooling systems regulating hot or chilled water distribution
• Baseboard radiators and convectors where mechanical space is limited
• Low-pressure steam applications up to 15 psig saturated steam within building automation networks