Schneider Electric (Barber Colman) AV-497 Linkage

The Schneider Electric (Barber Colman) AV-497 is a critical pneumatic actuator linkage kit designed for seamless field assembly of MK-6811 and MK-6911 actuators onto large-scale valve bodies. This robust mechanical interface allows for the precise conversion of pneumatic signals into linear force, specifically coupling the MK-6811 actuator to VB-8xxx series valves in the 2-1/2" to 5" size range. For larger 6" applications, this kit facilitates the connection of the MK-6911 actuator, ensuring a reliable valve-actuator mounting solution that maintains factory-level performance in high-demand HVAC automation systems.

Constructed from heavy-duty die-cast aluminum, the AV-497 linkage is built to withstand the rigorous vibrations and thermal stresses of commercial boiler rooms and mechanical sheds. The assembly includes a factory-integrated indicator plate for immediate visual valve position indication, enabling technicians to verify stem travel at a glance without specialized tools. Whether you are performing a field retrofit or replacing a legacy Schneider Electric valve linkage, this kit ensures the proportional pneumatic control of chilled or hot water systems remains accurate and responsive.

• Optimized Compatibility: Verified for use with MK-6811 (2-1/2" to 5") and MK-6911 (6") actuators on VB-8xxx globe valves.
• Rugged Durability: The die-cast aluminum mounting bracket resists corrosion and mechanical fatigue in industrial environments.
• Precision Alignment: Features standard valve position indication to assist in rapid diagnostics and commissioning.
• Installation Versatility: Suitable for field assembly, allowing for the salvage of existing valve bodies while upgrading actuators.

What is the primary function of the AV-497 linkage?
This kit provides the necessary hardware—including the bracket, stem extension, and connecting pins—to mechanically link a 50 sq. in. effective area pneumatic actuator to 2.5" through 6" VB-8000 series valve bodies.

Can this be used for steam applications?
Yes, however, for steam service, it is recommended to mount the actuator at a 45-degree angle from vertical to protect the diaphragm from excessive heat rising through the valve stem.

Does this kit include the actuator?
No, the AV-497 is a linkage kit only. Actuators like the MK-6811 or MK-6911 must be sourced separately based on your specific spring range requirements.

This item is not eligible for free shipping.

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.