Schneider Electric (Barber Colman) AV-7400 Linkage Kit

The Schneider Electric (Barber Colman) AV-7400 Linkage Kit is a specialized field-assembly solution designed to interface MK-2690 pneumatic actuators with VB-7xxx series valve bodies ranging from 1/2" to 2". As a veteran technician knows, maintaining precise stroke and seat pressure is critical in pneumatic systems; this kit simplifies that process by requiring no stem height setting during installation on compatible VB-7xxx valves. The AV-7400 includes multiple actuator springs—yellow (3-7 psig), black (5-10 psig), and blue (8-13 psig)—to accommodate various control signal requirements and ensure proper valve close-off across direct-acting or reverse-acting configurations. Built for durability in demanding HVACR mechanical rooms, the linkage assembly uses a rugged hexagon coupler and spring compression screw to provide a secure mechanical bond, ensuring reliable proportional control for hot water, chilled water, and steam applications. When replacing older pneumatic valve linkages, verify your valve body series to confirm the proper seating within the 1/16" stem tolerance required for peak performance.

• Precise Actuation: Engineered specifically for the MK-2690 actuator to provide seamless operation with VB-7xxx globe valves.
• Simplified Installation: Eliminated stem height adjustments reduce field labor and potential setup errors for contractors.
• Signal Versatility: Includes color-coded springs for 3-7, 5-10, and 8-13 psi ranges, streamlining inventory for multiple pneumatic control signals.
• Robust Construction: Heavy-duty die-cast and steel components withstand the vibration and thermal cycling common in industrial HVAC systems.

• Which valve bodies are compatible with the AV-7400? This kit is designed for 1/2" through 2" Schneider Electric VB-7xxx series valves. It is not intended for the discontinued VB-9xxx series, which may require the AV-400 linkage instead.
• Does this kit include the pneumatic actuator? No, the AV-7400 is the hardware linkage kit only; the MK-2690 pneumatic actuator must be purchased separately.
• How do I select the correct spring for my application? Choose the spring based on your controller's output: use the yellow spring for 3-7 psig, black for 5-10 psig, and blue for 8-13 psig.

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.