Johnson Controls VG1841AF Valve

The Johnson Controls VG1841AF is a high-performance 3-way ball valve designed for precise flow control in commercial HVAC systems. This 1/2-inch valve features an NPT threaded connection and a 2.9 Cv rating, utilizing a forged brass body with plated brass trim for reliable operation in chilled and hot water applications. Engineered with an equal percentage flow characteristic through a built-in Amodel flow characterization disk, it ensures linear heat transfer in coils, making it an ideal choice for mixing or diverting service. The VG1000 series design includes dual EPDM stem seals and 15% graphite-filled PTFE ball seats, providing a maintenance-free service life exceeding 200,000 cycles. Standard brass trim models handle fluid temperatures from 23?F to 203?F. This valve is compatible with various Johnson Controls actuators, including the VA9104 and M9106 series, allowing for flexible field or factory mounting to meet specific automation requirements.

• Precise Modulation: The characterizing disk provides equal percentage flow for stable control loop performance.
• High Close-Off Pressure: Rated for up to 200 psi close-off, ensuring tight shut-off and preventing leakage in high-head systems.
• Internal Durability: Dual EPDM O-rings and graphite-reinforced seats offer superior wear resistance and leak-free operation.
• Versatile Piping: Optimized for both mixing and diverting applications with a compact footprint for tight mechanical spaces.
• Reliable Construction: The forged brass body supports a static pressure rating of 580 psig, meeting stringent industrial standards.

Which port is the inlet for the VG1841AF?
In 3-way configurations, Port A contains the flow-characterizing disk and must be used as the coil inlet for proper modulation. Port B serves as the bypass, and Port AB is the common port.

Is the VG1841AF rated for steam service?
This specific model features plated brass trim and is primary rated for water and glycol solutions up to 203?F. For low-pressure steam applications, refer to the stainless steel trim variants within the VG1000 series.

What actuators are compatible with this valve?
The valve is designed for use with Johnson Controls VA9104, M9106, and M9109 non-spring return actuators, as well as VA9203 and VA9208 spring-return models, providing options for on/off, floating, or proportional control.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.