Siemens 331-3011 Damper Actuator, Pneumatic, Number 6, 4" Stroke, 3 to 13 psi, Integral Pivot with Pivot Post, Extended Shaft, UL Recognized

Siemens 331-3011 Damper Actuator, Pneumatic, Number 6, 4" Stroke, 3 to 13 psi, Integral Pivot with Pivot Post, Extended Shaft, UL Recognized. Siemens Nos. 3, 4 and 6 Pneumatic Damper Actuators are heavy-duty, spring return actuators designed to drive large dampers and other applications requiring large diaphragm area and long stroke.