Справочник Пользователя для Siemens 331-2856

 

 

 
 

 
 

Document No. 155-029P25

AP 331-3

December 3, 2004

 

 

331-2793 Actuator 

 

 

331-2857 Actuator 

with Clevis and Pin 

331-3012 Extended Shaft and Frame 

Mounting 

 

The POWERS Controls No. 6 Pneumatic Damper Actuator is a heavy-duty, rolling 
diaphragm, spring return actuator designed to drive large dampers, centrifugal 
refrigeration inlet vanes, and other applications requiring a large, effective diaphragm 
area and long stroke. 

•  All metal body construction 
•  Replaceable ozone-resistant, silicone rubber, rolling diaphragm 
•  Pivot mounting for extended shaft or frame mounting 
•  Positioning relay (optional) 
•  Adjustable forward travel stops (optional) 
•  Three spring ranges for sequencing with other control devices 

See Table 1. 

The No. 6 Pneumatic Damper Actuator controls outdoor, return air, exhaust, face and 
bypass, and fan discharge dampers. It is recommended for heavy-duty applications 
using multi-section dampers where either unison or sequence operation is required. 

 

 

Certain actuators in Table 1 are UL Recognized Components for 
fire/smoke applications under category EMKU2. This category covers 
pneumatic damper actuators used on fire dampers and leakage rated 
dampers. 

 

Siemens Building Technologies, Inc.