VG1845AF+9A4GGA Johnson Controls Valve / Actuator

Overview

The Johnson Controls VG1845AF+9A4GGA is a high-performance 1/2-inch 3-way ball valve assembly engineered to regulate the flow of hot water, chilled water, glycol solutions (up to 50%), and low-pressure steam in commercial HVAC systems. This assembly combines a rugged forged brass valve body with a 300 Series stainless steel ball and stem for enhanced corrosion resistance. It features an integrated VA9104-GGA-2S non-spring return electric actuator, which provides accurate proportional (0-10 VDC) control.

Features

• Features a 1/2-inch 3-way body pattern configuration with NPT threaded end connections
• Utilizes an Amodel flow characterizing disk to maintain equal percentage flow characteristics
• Equipped with a blowout-proof stem to safeguard operators and building systems
• Employs an EPDM double O-ring stem seal tested to remain leak-free after 200,000 cycles
• Provides tight shutoff with a closeoff pressure rating of 200 psi
• Delivers a 500:1 rangeability for exceptional temperature control under variable load conditions

Specifications

• Valve Size: 1/2 inch (DN15)
• Port Flow Capacity: 2.9 Cv (Port A) / 1.9 Cv (Port B)
• Body Pattern: 3-Way mixing or diverting
• Body Material: Forged brass
• Ball and Stem Material: 300 Series stainless steel
• Seal and Seat Material: EPDM O-rings and graphite-reinforced PTFE seats
• Actuator Type: Electric, non-spring return (VA9104-GGA-2S)
• Control Signal: 0-10 VDC proportional / modulating
• Supply Voltage: 24 VAC nominal
• Maximum Closeoff Pressure: 200 psid (1378 kPa)
• Fluid Temperature Range: -22°F to 284°F (-30°C to 140°C)

Applications

• Designed for demand-responsive flow regulation within commercial building automation systems
• Suitable for monitoring and controlling hot or chilled water loops in hydronic heating and cooling configurations
• Ideal for variable load air handling units, fan coil units, and re-heat coils
• Applicable for low-pressure saturated steam systems up to 15 psi (103 kPa) due to its stainless steel trim upgrade