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Specifications - Siemens 331-2856, 332-2856 AP 331-3 Technical Instructions

Powers controls no. 6 pneumatic damper actuator
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Technical Instructions
Document No. 155-029P25
December 3, 2004
Table 1. Product Numbers for No. 6 Pneumatic Damper Actuators.
Description
Actuator, integral pivot
Actuator, integral pivot and forward travel stops (Figure
1)
Actuator with clevis for frame mounting (Figure 2) or
remote extended shaft mounting (Figure 3)
Actuator with clevis and positioning relay (Figure 16)
Actuator, integral pivot with pivot post
Actuator, integral pivot with pivot post and positioning
3
relay
(Figure 16)
1
UL Recognized Components for Fire/Smoke Applications.
2
Also order frame mounting kit accessories.
3
Mounted on plate for extended shaft with clevis and crank for 3/8-inch (10-mm), 7/16-inch (11-mm), or 1/2-inch
(13-mm) diameter shaft. Parts for frame mounting (blade drive) included with kit.
NOTE:
When the actuator is ordered with universal mounting, the mounting plate, pivot post and hardware, clevis,
damper crank, rocker arm, and all screws/nuts are included. Order other frame mounting accessories as
required, if not supplied by damper manufacturer.

Specifications

Page 2
Pivot
Pivot
Pivot
Pivot
3
Extended Shaft
Extended Shaft with
Positioning Relay
Effective diaphragm area
Stroke
Housing
Stem
Diaphragm
Spring
Bearing
Maximum air pressure
Nominal spring ranges
Ambient temperature range
Operation
Air connection
Type of mounting
Thrust and torque rating
Dimensions
Shipping Weight
Agency Approvals
POWERS™ Controls No. 6 Pneumatic Damper Actuator
Mounting Style
3-8 psi
(21-55 kPa)
331-2793
2
331-2857
2
331-3012
Product Numbers
Nominal Spring Range
3-13 psi
(21-90 kPa)
331-2794
331-2796
331-2858
331-3013
2
2
17.9 inches
(115 cm
)
4 inch (102 mm)
Aluminum
Type 416 stainless steel
Ozone-resistant silicone rubber
Steel
Bronze oilite
30 psig (210 kPa)
3 to 8 psi (21 to 55 kPa)
3 to 13 psi (21 to 90 kPa)
8 to 13 psi (55 to 90 kPa)
-20°F to 200°F (-29°C to 93°C)
1/8-inch NPT
Pivot, universal (extended shaft or
frame mount)
See Table 2
See Figure 13 through Figure 16
9 lb (4.08 kg)
Complies with UL555 and UL555S
Siemens Building Technologies, Inc.
8-13 psi
(55-90 kPa)
1
331-3060
331-2988
1
331-2856
332-2856
1
331-3011
332-3011

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