Housing. Schneider Electric Damper Actuators
Schneider Electric Damper Actuators are pneumatic actuators used to control dampers, mixing boxes, and air valves in heating, ventilating, and air conditioning systems. They have an 8-inch² effective area and a maximum air pressure of 30 psig. The actuators are constructed from die-cast aluminum and have a beaded molded neoprene diaphragm. They have a spring that retracts the actuator shaft on loss of air pressure and can be mounted in any position. The actuators come with a mounting bracket (except MK-3300 Series end mounting) and a connector for a 5/16" diameter push rod.
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MK-3000 Series, MK2-3000
Series, MK4-3000 Series
Pneumatic Damper Actuators
General Instructions
APPLICATION
Proportional pneumatic actuator with 8 in.
2
(52 cm
2
) effective area used to control dampers, mixing boxes, air valves, etc., in heating, ventilating and air conditioning systems,
MK2-31X1 used for high temperatures.
SPECIFICATIONS
Construction:
Housing, Die cast aluminum.
Diaphragm, Beaded molded neoprene. MK2-31X1 only -
Beaded molded silicone.
Stroke: See Table 2.
Start Point: Adjustable on most models ± 1 psi, see Table 2.
Spring: Retracts actuator shaft on loss of air pressure.
Maximum Air Pressure: 30 psig (207 kPa).
Ambient Temperature Limits:
Shipping, -40 to 160
°F (-40 to 71°C).
Operating, -20 to 160
°F (-29 to 71°C).
MK2-31X1 only,
Shipping, -40 to 250
°F (-40 to 121°C).
Operating, -20 to 250
°F (-29 to 121°C), for 30 minute exposure 450
°F (232°C).
Air Connections: 1/8” FNPT.
Mounting: In any position. Mounting bracket (except
MK-3300 Series end mounting) and connector for 5/16" (8 mm) diameter push rod included with actuator.
Dimensions: 12" high x 5-7/8" wide x 5-1/2" deep (305 mm x 143 mm x 140 mm)
Table-1 Nominal Damper Area For Proportional Control a
ACCESSORIES
AK-42309-500
AM-111
AM-112
AM-113
AM-115
AM-122
AM-123
AM-125
AM-125-048
AM-132
AM-161-3
AM-301
AM-530
AM-532
AM-533
AM-534
AM-535
AM-536
AM-545
TOOL-95
Positive positioner and linkage, do not use with
MK2-3100 series
Crank arm for 5/16 " diameter damper shaft
Crank arm for 3/8 " diameter damper shaft
Crank arm for 1/2 " diameter damper shaft
Crank arm for 7/16 " diameter damper shaft
Linkage connector straight type
Damper clip
5/16 " x 20 " damper rod
5/16 " x 48 " damper rod
Ball joint connector
Damper linkage kit
90
°
mounting bracket for pivot mounting
Crank arm for 1/2 " diameter damper shaft holes for 3-1/2 " and 4-1/2 " stroke
Bolt-on frame lug and damper blade clip kit
Actuator shaft extension
Pivot stud for pivot mounting
Clevis for pivot mounting
Mounting plates for pivot mounting on ducts or damper frame
Rod end connector for 5/16 " (10 mm) dia. rods
Pneumatic calibration tool kit
Actuator Part
Number
MK-3101
MK-3101-108
MK2-3101
MK4-3101
MK-3111
MK2-3111
MK-3121-109
MK-3121
MK2-3121
MK-3141
MK4-3141
MK-3151
MK-3161 b
MK-3201
MK-3211
MK-3221
MK-3311-109
MK-3321-102
MK-3801
MK4-3801
MK-3811
MK-3821
MK-3841
MK4-3841
MK4-3111 c
MK4-3121 d
Parallel Blades ft
2
11.6
23.2
34.8
m
2
1.07
2.15
3.23
Opposed Blades ft
2
15
30
45 m
2
1.39
2.79
4.18
b c d a
For two-position control use proportional rating of the same actuator with positive positioner. Damper ratings are nominal and based on standard
(not low leakage) dampers at 1" (25.4 mm) W.C. static pressure and 2000 fpm (10 m/s) velocity.
Requires 20 psi be available to the actuator.
Requires minimum 15 psi be available to the actuator.
Proportional control with positioner (8-13 spring, 20 psi supply).
Printed in U.S.A. 1/10
© Copyright 2010 Schneider Electric All Rights Reserved.
F-12586-11
Table-2 Specifications.
Maximum Force b
Part Number
Nominal
Operating
Range
Starting
Pressure
Nominal
Stroke a
Return
Stroke
Based on
1.5 psi
(10 kPa)
Pressure to
Actuator lb.
N
15 psi
(103 kPa)
Supply
Dual Press.
System
Power Stroke
15 psi
(103 kPa)
Supply
Single
Press.
System d lb. N
20 psi
(138 kPa)
Supply
Single or
Dual Press.
System lb.
N
MK-3101-108 psig
3-7.2
kPa
21-50 psig
3 ± 1 kPa
21 ± 7 in. (mm)
3 (76)
Adjustable
2 to 4 (51 to 102)
12 53 lb.
50
N
226 62 276 102 454
MK-3101
MK2-3101
MK4-3101 e
MK-3111
MK2-3111
MK4-3111
MK-3121
MK-3121-109
MK-3141
3-8
3-8
5-10
5-10
8-13
21-55
21-55
34-69
34-69
55-90
3 ± 1
3 ± 1
5 ± 1
5 ± 1
8 ± 1
21 ± 7
21 ± 7
3 ± 7
34 ± 7
55 ± 7
3 1/2 (89)
Adjustable
2 to 4 (51 to 102)
12
12
28
28
52
53
53
125
125
231
44
44
28
28
4
196
196
125
125
18
56
56
40
40
16
249
249
178
178
71
96
96
80
80
56
427
427
356
356
249
MK-3151
MK-3161
MK-3201
MK-3211
MK-3221
MK-3311-109
MK-3321-102
8-13
3-13
3-6
9-12
3-6
11-17
3-8
21-41
62-83
21-41
76-117
21-55
5-10 34-69
8-13
5-10
8-13
55-90
21-90
55-90
34-69
55-90
8 ± 1
3 non-adj
3-6
3-6
3 ± 1
5 ± 1
8 ± 1
5 ± 1
8 ± 1
55 ± 7
21 non-adj
21 to
41
21 to
41
21 ± 7
2-3/4 (70)
Adjustable
2 to 2-3/4
(51 to 70)
34 ± 7
55 ± 7
90 o
Rotation
Typical,
Adjustable
1.2 to 4.4
(30 to 111)
34 ± 7 3-1/2 (89)
Adjustable
55 ± 7
2 to 4 (51 to 102)
52
12
12
12
12
28
52
28
52
231
53
53
53
53
125
231
125
231
4
4
12
0
44
28
4
28
4
18
18
53
0
196
125
18
125
18
16
16
24
0
56
40
16
40
16
71
71
107
0
249
178
71
178
71
56
56
64
24
96
80
56
80
56
249
249
285
107
427
356
249
356
249
MK-3801
MK-3811
3-8 21-55 3 ± 1 21 ± 7 12 53 44 196 56 249 96 427
MK4-3811
MK-3821
5-10 34-69
5-10 34-69
8-3 55-90
5 ± 1
5 ± 1
8 ± 1
34 ± 1
34 ± 1
55 ± 1
55 ± 1
21 non-adj
3-1/2 (89)
Adjustable
2 to 4 (51 to 102)
28 125 28
28 125 28
52 231 4
125
125
18
40
40
16
178
178
71
80
80
56
356
356
249 c d a b e
MK-3841
8-13
3-13
55-90
21-90
8 ± 1
3 non-adj
52
12
231
53
4
4
18
18
16
16
71
71
56
56
Factory setting required for published operating range.
Force and torques based on factory set stroke and starting pressure.
Nominal torque for actuators without positive positioner is based on 1.5 psi pressure change at the actuator.
Adjust pressure reducing valve so that listed pressures are available at the actuator.
Factory installed positive positioner (AK-42309-500) start point adjustable 2 to 10 psi with range adjustable 2 to 10 psi.
249
249
79
79
Nominal Torque c
Proportional Control
15 psi
(103 kPa)
Supply Dual
Press.
System
15 psi
(103 kPa)
Supply
Single Press.
System
20 psi
(138 kPa)
Supply
Single or
Dual Press.
System
lb-in.
N-m lb-in.
N-m lb-in.
N-m
18
21
21
21
49
7
7
7
21
0
21
21
7
21
7
21
21
49
7
7
7
2.03
2.37
2.37
2.37
5.54
79
79
79
2.37
0
2.37
2.37
.79
2.37
.79
2.37
2.37
5.54
79
18
21
21
21
49
21
28
21
21
0
21
21
21
21
21
21
21
49
21
28
21
2.03
2.37
2.37
2.37
5.54
2.37
3.16
2.37
2.37
0
2.37
2.37
2.37
2.37
2.37
2.37
2.37
5.54
2.37
3.16
2.37
18
21
21
21
49
21
91
21
21
21
21
21
21
21
21
21
21
49
21
91
21
2.03
2.37
2.37
2.37
5.54
2.37
10.28
2.37
2.37
2.37
2.37
2.37
2.37
2.37
2.37
2.37
2.37
5.54
2.37
10.28
2.37
2 © Copyright 2010 Schneider Electric All Rights Reserved.
F-12586-11
Figure-1 MK-3100 Series Dimensions.
1
Figure-2 MK-3200 Series Dimensions.
Mounting plate for MK-3101-108 and MK-3300-102
Series Actuators
Figure-3 MK-300 Series Dimensions
2
.
1.
All dimensions shown in the Instruction Sheet are in inches.
F-12586-11
Figure-4 MK-3800 Series Dimensions.
2.
Typical Model shown. Linkage, and air connection details may vary from
Model to Model.
© Copyright 2010 Schneider Electric All Rights Reserved.
3
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