Siemens Building Technology 331-4513 No. 3 Pneumatic Damper Actuator 5-10 PSI 2-3/8" Stroke Fixed Mount

The Siemens Building Technology 331-4513 is a No. 3 pneumatic damper actuator (also called a pneumatic damper operator). It has a 5-10 psi nominal spring range, a 2-3/8 inch stroke and a fixed bracket mount. It is a compact, totally enclosed, rolling diaphragm actuator. It is made for modulating or two-position control of HVAC dampers and air valves.

Key Features:

• Actuator type: No. 3 pneumatic, rolling diaphragm design
• Spring range: 5-10 psi (35-69 kPa) nominal
• Stroke: 2-3/8 inches (60 mm)
• Mounting style: Fixed bracket mount
• Output shaft: 3/8 inch-24 thread for linkage assembly

Installation note: For this actuator, Siemens lists Clevis 333-207 and Linkage Kit 331-958 as separate order items.

Typical uses include mixing box dampers, air valves, and damper control for unit ventilators and unit conditioners. The Powers Controls No. 3 actuator line is used in commercial HVAC pneumatic control systems.