V-3974-6008 Johnson Controls Spring Kit

Overview

The Johnson Controls VG7842GT+3008EP is a high-performance pneumatic control valve and actuator assembly from the VG7000 Series. Designed for precise flow control in commercial HVAC systems, this assembly combines a 1/2-inch three-way mixing globe valve with an exposed yoke pneumatic actuator featuring a built-in positioner. It features a rugged cast bronze body with durable stainless steel trim, engineered to manage demanding water and steam applications.

Features

• High Reliability: Built with a cast bronze body and stainless steel trim for superior corrosion resistance and an extended operational life cycle tested over one million times.
• Precise Modulation: Incorporates a linear flow characteristic ideal for precise three-way mixing applications.
• Serviceability: Features an in-place valve repacking design to extend longevity and simplify maintenance.
• Robust Actuation: Equipped with a pneumatic actuator providing reliable operation with an 8 square inch effective diaphragm area and a spring-return fail-safe configuration.
• Enhanced Control: Includes a factory-mounted pneumatic positioner (indicated by the “P” suffix) for optimized response and positioning accuracy.

Specifications

• Valve Size: 1/2 in.
• Connection Type: Female NPT
• Piping Configuration: 3-Way Mixing
• Flow Capacity: 4.6 Cv
• Body Material: Cast Bronze
• Trim Material: Stainless Steel
• Nominal Spring Range: 9 to 13 psig
• Maximum Closeoff Pressure: Actuator dependent (typically 225 psi for water / 49 psi for steam configurations)
• Fluid Temperature Range: 35°F to 284°F (2°C to 140°C) for water, up to 338°F (170°C) for steam depending on actuator configuration
• Maximum Pressure Ratings: Water: 400 psi up to 150°F, decreasing to 308 psi at 338°F; Steam: 100 psi at 338°F
• Pressure Rating Compliance: ANSI Class 250 (Meets ASME B16.15 requirements)

Applications

• Commercial HVAC Systems: Ideal for regulating flow in building automation and temperature control systems.
• Hydronic Control: Designed for mixing hot water, chilled water, and glycol solutions (up to 50% concentration).
• Steam Regulation: Suitable for low and medium-pressure saturated steam applications in mechanical systems.