Siemens 331-3000 Damper Actuator, Pneumatic, Number 4, 4" Stroke, 3 to 7 psi, Integral Pivot with Pivot Post, Universal Kit Mounting

Siemens 331-3000 Damper Actuator, Pneumatic, Number 4, 4" Stroke, 3 to 7 psi, Integral Pivot with Pivot Post, Universal Kit Mounting. 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.