Siemens 331-2856 User Manual

Powers™ controls, Technical instructions, No. 6 pneumatic damper actuator

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POWERS™ Controls

Technical Instructions

Document No. 155-029P25

AP 331-3

December 3, 2004

No. 6 Pneumatic Damper Actuator

331-2793 Actuator

331-2857 Actuator

with Clevis and Pin

331-3012 Extended Shaft and Frame

Mounting

Description

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.

Features

• 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

Product Numbers

See Table 1.

Application

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.

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