Technical Instructions
Document No. 155-029P25
AP 331-3
December 3, 2004
POWERS™ Controls
No. 6 Pneumatic Damper Actuator
331-2793 Actuator |
331-2857 Actuator |
331-3012 Extended Shaft and Frame |
|
with Clevis and Pin |
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.
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 |
|
3-13 psi |
8-13 psi |
|
|
(21-55 kPa) |
|
(21-90 kPa) |
(55-90 kPa) |
Actuator, integral pivot |
Pivot |
331-2793 |
|
331-2794 |
331-30601 |
Actuator, integral pivot and forward travel stops (Figure |
Pivot |
— |
|
331-2796 |
331-2988 |
1) |
|
|
|
|
|
Actuator with clevis for frame mounting (Figure 2) or |
Pivot2 |
331-2857 |
|
331-2858 |
331-28561 |
remote extended shaft mounting (Figure 3) |
|
|
|
|
|
Actuator with clevis and positioning relay (Figure 16) |
Pivot2 |
— |
|
— |
332-2856 |
Actuator, integral pivot with pivot post 3 |
Extended Shaft |
331-3012 |
|
331-3013 |
331-30111 |
Actuator, integral pivot with pivot post and positioning |
Extended Shaft with |
— |
|
— |
332-3011 |
relay3 (Figure 16) |
Positioning Relay |
|
|
|
|
1UL Recognized Components for Fire/Smoke Applications.
2Also order frame mounting kit accessories.
3Mounted 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 inches2 (115 cm2) |
|
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. |
POWERS™ Controls No. 6 Pneumatic Damper Actuator |
Technical Instructions |
|
Document No. 155-029P25 |
|
December 3, 2004 |
Accessories |
Damper shaft extension kits: |
331-631 |
|
1/2-inch (13-mm) diameter, 2-1/4 inch (57-mm) rod |
|
|
(See TB-128 POWERS™ Controls Damper Shaft Extension |
|
|
Technical Bulletin 155-205P25) |
|
|
1/2-inch (13-mm) diameter, 9-inch (229-mm) long hollow rod |
333-184 |
|
1/2-inch (13-mm) diameter, 9-inch (229-mm) long rod |
333-042 |
|
1–inch (25–mm) diameter 11-5/8 inch (295-mm) long (Ruskin) |
333–194 |
|
Damper shaft extension kit adapter - 3/8 inch (10 mm) diameter |
331-632 |
|
(for use with Damper Shaft Extension Kit 333-042) |
|
|
Actuator shaft extensions: |
|
|
10-1/8 inch (257-mm) long |
331-434A |
|
Adapter kit for 1/2-inch NPT pipe |
333-030 |
|
Cranks - damper shaft: |
|
|
3/8-inch (10-mm) - 1/2-inch (13-mm) diameter, |
|
|
Selectable radius |
331-941 |
|
5/8-inch (16-mm) diameter |
333-182 |
|
3/4-inch (19-mm) diameter |
333-183 |
|
1-inch (25-mm) diameter |
333-181 |
|
Cast iron crank with set screws |
333-078 |
|
Linkage kit, 4-inch (102-mm) link and crank |
331-958 |
|
Universal mounting plate |
|
|
3/4-inch shaft |
331-623 |
|
1-inch shaft (use with 333-194) |
331-623A |
|
Flange bearing (1/2 inch, 13 mm) |
331-862 |
|
(for 331-623 Universal Mounting Plate) |
|
|
Right angle mounting plate |
333-208 |
|
Remote mounting kit (extended shaft), Figure 3 |
331-618 |
|
Positioning relay |
147-2000 |
|
Positioning relay mounting kit |
147-276 |
|
Frame mounting kits |
|
|
One-section damper (Figure 5) |
751* |
|
Two-section damper (Figure 6) |
752* |
|
* Order frame mounting kits and damper blade clip kit from |
|
|
Arrow United Industries. |
|
|
Frame mounting lug |
331-569 |
|
Mounting lug screws (three required for frame mounting lug) |
034-123K |
|
Offset Mounting Bracket (Figure 14) |
333-176 |
|
Travel Stop Kit (for model 3 and 4 actuators only) |
333-197 |
|
Damper Blade Rocker Arm |
333-034 |
|
Screws (two) |
030 510J |
|
Nuts (two) |
041-230J |
|
|
|
Service Kits |
Silicone diaphragms (package of five) |
333-572 |
|
|
|
Siemens Building Technologies, Inc. |
Page 3 |
Technical Instructions |
POWERS™ Controls No. 6 Pneumatic Damper Actuator |
Document No. 155-029P25 |
|
December 3, 2004 |
|
Actuator Sizing The quantity of actuators required depends on several torque factors. To determine the quantity of actuators required for the installation:
1.Obtain damper torque ratings (ft-lb/ft2) from the damper manufacturer.
2.Determine the area of the damper.
3.Calculate the total torque required to move the damper:
Total Torque = Torque Rating x Damper Area
4. Calculate the total quantity of actuators required:
Number of |
= |
Total Damper Torque Required |
Actuators |
|
SF1 × Actuator Torque (see Table 2) |
1Safety Factor: When calculating the number of actuators required, a safety factor should be included for unaccountable variables such as slight misalignments, aging of the damper, etc. A suggested safety factor is 0.80 (or 80% of the rated torque).
See AB-300 Damper Actuator Sizing and Selection Application Bulletin in the HVAC
Systems/Controls Reference Data (125-1853) for additional sizing information. See
TB-181 Powers™ Controls Maximum Thrust Ratings of Pneumatic Damper Actuators
Technical Bulletin (155-219P25) for additional torque requirements.
Table 2. Thrust and Torque Rating.
Nominal |
|
Maximum Thrust lb. (N) |
|
Torque Rating* lb-in (Nm) |
|
|||||||||
Full Stroke Forward |
Spring |
Gradual |
|
|
2-Position Operation |
|
||||||||
Spring |
|
|
|
Return |
Operation |
|
|
or Positioner |
|
|
||||
Range |
15psi |
18 psi |
25 psi |
(No Stroke) |
|
|
15 psi |
|
18 psi |
|
25 psi |
|||
|
(103 kPa) |
(124 kPa) |
(172 kPa) |
0 psi (0 kPa) |
|
|
(103 kPa) |
|
(124 kPa) |
|
(172 kPa) |
|||
3-8 psi |
125 (556) |
179 (796) |
304 |
54 (240) |
50 (5.6) |
|
75 |
(8.5) |
|
75 |
(8.5) |
|
75 |
(8.5) |
(21-55 kPa) |
|
|
(1352) |
|
|
|
|
|
|
|
|
|
|
|
3-13 psi |
36 (160) |
89 (396) |
214 (952) |
54 (240) |
50 (5.6) |
|
75 |
(8.5) |
|
75 |
(8.5) |
|
75 |
(8.5) |
(21-90 kPa) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
8-13 psi |
36 (160) |
89 (396) |
214 (952) |
144 (640) |
50 (5.6) |
|
202 |
(22.8) |
|
202 |
(22.8) |
|
202 |
(22.8) |
(55-90 kPa) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
* With maximum hysteresis of 2.5 psi (17.2 kPa) @ 90° rotation.
Page 4 |
Siemens Building Technologies, Inc. |
Loading...