Schneider Electric (Barber Colman) AV-401 Linkage Kit

The Schneider Electric AV-401 Linkage kit is engineered for field-mounting MK-4600 series pneumatic actuators onto VB-7000 and VB-9000 series valve bodies. Providing a precise mechanical interface, this Barber Colman linkage ensures stable stroke transmission and reliable valve modulation in pneumatic control systems. The heavy-duty construction is designed to withstand the high-cycle demands of HVAC applications, accommodating VB-7xxx valves in sizes ranging from 1/2" to 2" and VB-9xxx valves from 1/2" to 1-1/4". A critical component for pneumatic actuator retrofit projects, the AV-401 facilitates seamless integration between legacy valve bodies and modern pneumatic actuators. Using this HVAC valve linkage ensures proper stem extension and alignment, preventing premature packing wear and ensuring the actuator force is efficiently applied to the valve plug for accurate flow control in steam or water systems.

Key Benefits

• Compatible with Schneider Electric MK-4601, MK-4611, and MK-4621 pneumatic actuators for versatile field installation.
• Supports a wide range of globe valve sizes, providing a standardized solution for 1/2" through 2" valve bodies.
• Maintains mechanical linkage precision to ensure linear travel and tight shut-off performance.
• Durable materials resist corrosion and mechanical fatigue in demanding mechanical room environments.
• Simplifies the pneumatic valve assembly process during maintenance or control system upgrades.

Common Questions

Which valve bodies are compatible with the AV-401?
This linkage is specifically designed for VB-7xxx series (1/2" to 2") and VB-9xxx series (1/2" to 1-1/4") valve bodies when paired with MK-46xx actuators.

Does the AV-401 include the actuator or valve body?
No, this is a linkage kit only. It includes the necessary brackets and hardware to connect an existing actuator to a valve body.

What is the primary function of the AV-401 linkage?
It converts the linear motion of the pneumatic actuator into the specific stroke required to modulate the valve stem accurately.

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.