T-4756-201 Johnson Controls Thermostat

Overview

The Johnson Controls VG1845AD+9A4GGA is a factory-assembled 1/2-inch, 3-way forged brass ball valve paired with a VA9104-GGA-2S non-spring return electric actuator. Engineered to regulate fluid flow in HVAC systems, this assembly features a 1.2 Cv rating and an equal percentage flow characteristic to deliver precise temperature control.

Features

• Durable 300 Series stainless steel ball and stem trim for enhanced corrosion resistance.
• Characterized Amodel flow control disk ensures highly accurate equal percentage flow.
• High thermal tolerance allowing it to handle hot water, chilled water, or low-pressure steam.
• High performance with a 200 psi close-off pressure rating and a 580 psig static pressure limit.
• Long operational life with a lifetime expectancy of minimum 200,000 leak-free cycles.

Specifications

• Valve Size: 1/2 inch
• Configuration: 3-Way mixing or diverting
• Flow Coefficient: 1.2 Cv (Port A) / 0.7 Cv (Port B)
• Connection: Threaded Female NPT
• Actuator Model: VA9104-GGA-2S
• Actuator Type: Electric, Non-Spring Return
• Control Input: 0-10 VDC Proportional / 4-20 mA
• Operating Voltage: 24 VAC
• Materials: Forged brass body, stainless steel trim, EPDM O-rings, and graphite-reinforced PTFE seats
• Close-off Rating: 200 psi

Applications

• Used in commercial HVAC systems to respond to demands from central controllers.
• Suitable for managing hot water, chilled water, and water/glycol mixtures up to 50%.
• Approved for low-pressure saturated steam configurations up to 15 psi.
• Ideal for localized temperature management in VAV reheat boxes, fan coil units, and small air handlers.