Siemens Building Technology 331-631 1/2" Shaft Extender for Actuators

The Siemens Building Technology 331-631 is a precision-engineered 1/2-inch shaft extender designed for use with Siemens #3, #4, and #6 series HVAC actuators. This component provides an extension solution when the standard actuator shaft length is insufficient to reach the damper or valve linkage.

Key Features:

• 1/2-inch diameter shaft extension for proper mechanical coupling
• Compatible with Siemens actuator models #3, #4, and #6
• Durable construction for reliable HVAC control applications
• Facilitates proper installation in tight or offset mounting situations

This shaft extender is an essential accessory for building automation and HVAC control systems where standard actuator shaft dimensions require modification to achieve proper mechanical connection to dampers, valves, or other controlled devices.