Siemens 331-2856 - Manual (Page 2)

Technical Instructions POWERS™ Controls No. 6 Pneumatic Damper Actuator
Document No. 155-029P25
December 3, 2004
Table 1. Product Numbers for No. 6 Pneumatic Damper Actuators.
Product Numbers
Nominal Spring Range
Description Mounting Style 3-8 psi
(21-55 kPa)
3-13 psi
(21-90 kPa)
8-13 psi
(55-90 kPa)
Actuator, integral pivot Pivot 331-2793 331-2794 331-3060 1
Actuator, integral pivot and forward travel stops (Figure
1) Pivot — 331-2796 331-2988
Actuator with clevis for frame mounting (Figure 2) or
remote extended shaft mounting (Figure 3) Pivot 2 331-2857 331-2858 331-2856 1
Actuator with clevis and positioning relay (Figure 16) Pivot 2 — — 332-2856
Actuator, integral pivot with pivot post 3 Extended Shaft 331-3012 331-3013 331-3011 1
Actuator, integral pivot with pivot post and positioning
relay
3 (Figure 16)
Extended Shaft with
Positioning Relay — — 332-3011
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 Effective diaphragm area 17.9 inches 2 (115 cm 2 )
Stroke 4 inch (102 mm)
Housing Aluminum
Stem
Type 416 stainless steel
Diaphragm Ozone-resistant silicone rubber
Spring Steel
Bearing Bronze oilite
Maximum air pressure 30 psig (210 kPa)
Nominal spring ranges 3 to 8 psi (21 to 55 kPa)
3 to 13 psi (21 to 90 kPa)
8 to 13 psi (55 to 90 kPa)
Ambient temperature range
Operation -20°F to 200°F (-29°C to 93°C)
Air connection 1/8-inch NPT
Type of mounting Pivot, universal (extended shaft or
frame mount)
Thrust and torque rating See Table 2
Dimensions See Figure 13 through Figure 16
Shipping Weight 9 lb (4.08 kg)
Agency Approvals Complies with UL555 and UL555S
Page 2 Siemens Building Technologies, Inc.