Siemens 331-2905 Damper Actuator Pneumatic No.4 3-7 PSI

The Siemens 331-2905 Damper Actuator Pneumatic No.4 is a computerized device using air to regulate the air flow of air conditioning and heating units (HVACs). It operates in a spring range of 3-7 PSI, giving the damper positions control over air distribution and system performance. The damper of the instrument is actuated by air pressure, using its pneumatic mechanism, and is smooth and accurate. This model is a 4" stroke and pivot mounting model that is versatile and easy to install in a variety of HVAC applications. It is enough to be robust. The primary use of the actuator is in ventilation and air conditioning systems where precise air flow control is required.