Siemens Building Technology 331-958 AP331 Linkage Kit for Pneumatic Damper Actuators

The Siemens Building Technology 331-958 is an AP331 linkage kit designed for use with #3, #4, and #6 pneumatic damper actuators. This essential accessory provides the mechanical connection between the actuator and damper shaft, enabling reliable damper control in HVAC applications.

Key Features:

• Compatible with Siemens #3, #4, and #6 series pneumatic damper actuators
• Includes 4-inch link and crank arm assembly for secure mechanical connection
• Designed for damper shafts ranging from 3/8 inch (10 mm) to 1/2 inch (13 mm) diameter
• Durable construction for long-lasting performance in commercial HVAC systems
• Simplifies installation and ensures proper torque transfer from actuator to damper

This linkage kit is an essential component for building automation systems, providing the critical mechanical interface between pneumatic actuators and HVAC dampers. The kit ensures smooth, reliable operation of air handling and ventilation control systems in commercial and industrial buildings.