Johnson Controls VG1845DR Valve

The Johnson Controls VG1845DR is a high-performance 1 1/4" 3-way ball valve designed for precision flow bypass and mixing in commercial HVACR systems. Built with a forged brass body and 300 series stainless steel trim, this VG1000 Series valve is engineered to handle chilled water, hot water, and 50% glycol solutions, as well as 15 psig saturated steam. Its equal percentage flow characteristic, provided by the Amodel flow characterizing disk, ensures stable temperature control and linear response even under varying load conditions. With a 29.2 Cv rating and a 500:1 rangeability, it offers the fine-tuned modulation required for demanding terminal unit applications. The EPDM double O-ring stem seal and graphite-reinforced PTFE seats provide exceptional durability, rated for over 200,000 cycles in harsh, iron-oxide contaminated environments. This NPT threaded valve supports a close-off pressure of 200 psi and a static pressure rating of 580 psig, making it a reliable choice for high-rise and industrial hydronic circuits.

• Superior stainless steel trim offers enhanced protection against corrosion and cavitation compared to standard brass.
• Maintenance-free design with a blowout-proof stem increases safety and reduces long-term operational costs for contractors.
• Wide fluid temperature range from -22°F to 284°F allows for versatile deployment in both cooling and low-pressure steam heating stages.
• High rangeability of 500:1 ensures precise control at the lower end of the flow curve, preventing hunting in the control loop.
• Easily pairs with VA9104, VA9203, and VA9208 series actuators for seamless field or factory mounting.

Is the VG1845DR suitable for steam applications?
Yes, because this model features stainless steel trim, it is rated for 15 psig saturated steam. Ensure your actuator and linkage are also rated for elevated steam temperatures.

What is the difference between equal percentage and linear flow in this 3-way valve?
The VG1845DR provides an equal percentage flow characteristic on Port A (the control port) to match the heat exchange curve of the coil, while providing linear flow on Port B (the bypass port) to maintain constant total system flow.

Can I install this valve in any orientation?
While the valve body can be oriented in various positions, it is best practice to install the actuator at or above the centerline of the horizontal piping to prevent moisture or condensation from damaging the electronics.

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.