Johnson Controls VG1841BL Valve

The Johnson Controls VG1841BL is a high-performance 3/4 inch 3-way ball valve engineered for precise control in hydronic HVAC systems. Featuring a 7.4 Cv flow coefficient and an equal percentage flow characteristic, this valve ensures linear heat output across a wide range of actuator positions, making it an ideal choice for chilled water and hot water applications with up to 50% glycol. Built with a rugged forged brass body and plated brass trim, the VG1841BL is rated for a maximum closeoff pressure of 200 psid, providing reliable shut-off and mixing capabilities in demanding commercial environments.

Designed for seamless integration with VA9104 and VA9203 series actuators, this valve features NPT threaded connections for straightforward installation. The VG1000 series internal characterized disk at Port A maintains stable control even at low flow rates, preventing hunting and extending the life of your HVAC control system. This technician-grade component is rated for fluid temperatures from 23°F to 203°F, ensuring durability and performance in standard hydronic loops.

• Precise Modulation: The equal percentage flow disk provides accurate temperature control and minimizes hunting.
• High Durability: Rated for a life expectancy of 200,000 cycles with a blowout-proof stem design.
• Standardized Fit: 3/4" NPT female threaded connections compatible with common field-mounted actuators.
• Leakage Protection: ANSI Class IV leakage rating ensures tight closure and energy efficiency.

What is the maximum pressure rating for the VG1841BL?
This valve has a static pressure rating of 580 psig (PN40) and a maximum closeoff pressure of 200 psid.

Is this valve compatible with steam applications?
No, the VG1841BL features plated brass trim and is intended for water and glycol. For 15 psig saturated steam, a stainless steel trim model (VG1845 series) is required.

Which port should be used as the inlet for control?
For proper characterization, Port A must be used as the inlet, as it contains the flow-characterizing disk.

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.