Siemens Building Technology 331-631 Damper Shaft Extension 1/2" 3-4-6 Acutators

The Siemens 331-631 Damper Shaft Extender in the HVAC Systems. It is made of stainless steel and has flow coefficient of 2. 5 CV, size 1/2". It has been designed with the NPT connections making it easier to fit on pipes or tubes in a secure manner. Its working mechanism includes coupling to a damper shaft which enable the positioning and functionality of dampers to be enhanced. This is most useful where due to space limit or special duct configuration, the extension of the damper-to-shaft lengths are required to be done in order to achieve the better performance of the dampers in HVAC systems.