Johnson Controls VG74K1ST Reconditioning Kit

The Johnson Controls VG74K1ST is a comprehensive field reconditioning kit designed for 2-inch VG7000 Series Bronze Control Valves. Engineered specifically for 2-way normally closed configurations with a push-down-to-open action, this kit restores the internal trim to factory specifications, maintaining a 46.2 Cv rating. Featuring brass trim and a precision-machined threaded stem, the internal components are designed for equal percentage flow characteristics, ensuring stable modulating control in hydronic systems. This kit is essential for addressing stem seal leaks or seat leakage without replacing the entire valve body, making it a cost-effective solution for large-scale preventive maintenance. By replacing the plug and stem assembly, packing, and relevant gaskets, technicians can restore shutoff integrity and flow modulation precision in applications using chilled water or hot water setups. The VG7000 reconditioning kit ensures the actuator interface remains consistent, preventing torque-related stem failures and performance bottlenecks in existing commercial HVAC loops.

Key Benefits

• Direct OEM Compatibility: Specifically sized for 2-inch VG7000 bronze valves to ensure exact tolerance matching and reliable linear stroke.
• Optimized Flow Control: The equal percentage flow design maintains consistent heat transfer rates during partial load conditions.
• Durable Brass Internals: High-grade brass trim provides excellent corrosion resistance and mechanical strength in closed-loop systems.
• Maintenance Efficiency: Replaces internal wear components like the valve seat and stem, significantly reducing downtime compared to full valve replacements.

Common Questions

Is this kit compatible with 3-way VG7000 valves?
No, the VG74K1ST is specifically calibrated for 2-way normally closed/push-down-to-open valves with 46.2 Cv; always verify the valve model number on the brass casting before installation.

Why is the threaded stem critical for this reconditioning kit?
The threaded stem design is required for legacy and specific modern actuators that utilize a mechanical linkage; ensuring the stem type matches prevents actuator calibration errors.

Does this kit resolve packing leaks in VG7000 series valves?
Yes, the reconditioning process includes the necessary internal seals and packing components needed to stop leaks at the stuffing box and restore pressurized integrity.

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.