VG7251GT+3008E Johnson Controls Valve / Actuator

Overview

The Johnson Controls VG7251GT+3008E is a pneumatic actuator valve assembly designed for the precise control of hot water, chilled water, glycol solutions, and low-pressure steam in commercial and industrial HVAC systems. It consists of a 1/2-inch 2-way normally open globe valve paired with an exposed spring-return pneumatic actuator, ensuring reliable performance and tight close-off capability.

Features

• Rugged die-cast actuator enclosure with an enclosed spring for extended durability.
• Long-life replaceable ring packing providing exceptional reliability and leak protection.
• Factory or field assembly options to fit various installation requirements.
• Straightforward installation and serviceability with in-place valve repacking.

Specifications

• Valve Size: 1/2 inch
• Flow Coefficient (Cv): 4.6
• Connection Type: Union Globe
• Fail Position: Normally Open
• Actuator Spring Range: 9 to 13 psi
• Trim Material: Brass
• Body Material: Cast Bronze
• Valve Stem: Stainless Steel
• Body Pressure Rating: ANSI Class 250 (up to 400 psi for water depending on temperature)
• Fluid Temperature Range: 35°F to 284°F (2°C to 140°C)
• Leakage Rating: ANSI Class IV (0.01% of maximum flow)
• Maximum Supply Air Pressure: 25 psig (172 kPa)

Applications

• Commercial HVAC systems for heating and cooling control.
• Hydronic systems utilizing hot water, chilled water, or glycol solutions (up to 50%).
• Low-pressure saturated steam applications (up to 15 psig).
• Baseboard radiators, convectors, and zone heating configurations where space is tight.