Siemens 331-2963 Damper Actuator, Pneumatic, Number 4, 4" Stroke, 8 to 13 psi, Front Mounting, Non-Pivot Mounting Screws

Siemens 331-2963 Damper Actuator, Pneumatic, Number 4, 4" Stroke, 8 to 13 psi, Front Mounting, Non-Pivot Mounting Screws. 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.