Johnson Controls VG1841FS Valve

The Johnson Controls VG1841FS is a professional-grade 2-inch 3-way ball valve engineered for precision bypass and mixing in commercial HVAC systems. This VG1000 Series valve features a rugged forged brass body and a specialized Amodel flow-characterizing disk, ensuring a true equal percentage flow characteristic for stable temperature control. With a high Cv rating of 46.8 and a static pressure rating of 580 psig, this unit is built to handle high-demand chilled and hot water applications with up to 50% glycol concentration.

The VG1841FS utilizes plated brass trim and a chrome-plated brass ball, providing a transition-free internal surface that resists mineral buildup. Designed for long-term reliability in iron-oxide contaminated water, the dual EPDM o-ring stem seals and graphite-reinforced PTFE seats have been tested to exceed 200,000 cycles. The NPT threaded connections allow for a secure, direct fit with standard piping, while the universal mounting flange supports seamless integration with VA9104, VA9203, and VA9208 series actuators.

• Precision Control: The equal percentage flow disk matches the heat exchanger's curve, preventing hunting and system oscillation.
• High Close-Off: Rated for a 200 psi close-off pressure, ensuring zero leakage and high system efficiency during bypass.
• Durable Construction: The forged brass housing and chrome-plated trim offer superior mechanical strength and corrosion resistance.
• Chemical Compatibility: Safe for use with hot water, chilled water, and glycol solutions up to 203°F (95°C).

What is the proper port configuration for the VG1841FS?
For this 3-way mixing valve, Port A must always be the inlet when using the flow-characterizing disk to maintain accurate control and prevent premature wear.

Which actuators are compatible with this 2-inch NPT valve?
The VG1841FS is designed to work with Johnson Controls VA9104, VA9203, and VA9208 electric actuators. It can be ordered as a standalone valve body or as a complete factory-mounted assembly.

Can this valve be used for steam applications?
This specific model features plated brass trim, which is optimized for water and glycol. For low-pressure steam applications, a stainless steel trim model from the VG1000 series is required.

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.