Schneider Electric MK2-3000 Series, MK4-3000 Series Data Sheet

APPLICATION

Proportional pneumatic actuator with 8 in.2 (52 cm2) 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 T a ble 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)

ACCESSORIES

AK-42309-500 Positive positioner and linkage, do not use with
AM-111 Crank arm for 5/16" diameter damper shaft

AM-112 Crank arm for 3/8" diameter damper shaft
AM-113 Crank arm for 1/2" diameter damper shaft
AM-115 Crank arm for 7/16" diameter damper shaft
AM-122 Linkage connector straight type
AM-123 Damper clip
AM-125 5/16" x 20" damper rod
AM-125-048 5/16" x 48" damper rod
AM-132 Ball joint connector
AM-161-3 Damper linkage kit
AM-301 90° mounting bracket for pivot mounting
AM-530 Crank arm for 1/2" diameter damper shaft holes

AM-532 Bolt-on frame lug and damper blade clip kit
AM-533 Actuator shaft extension
AM-534 Pivot stud for pivot mounting
AM-535 Clevis for pivot mounting
AM-536 Mounting plates for pivot mounting on ducts or

AM-545 Rod end connector for 5/16" (10 mm) dia. rods
TOOL-95 Pneumatic calibration tool kit

MK2-3100 series

for 3-1/2

" and 4-1/2" stroke

damper frame

MK-3000 Series, MK2-3000

Series, MK4-3000 Series

Pneumatic Damper Actuators

General Instructions

Table-1 Nominal Damper Area For Proportional Control

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

b

MK-3161

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
MK4-3811

MK4-3121
MK4-3821

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.

b

Requires 20 psi be available to the actuator .

c

Requires minimum 15 psi be available to the actuator.

d

Proportional control with positioner (8-13 spring, 20 psi supply).

c
c

d
d

Parallel Blades Opposed Blades

2

ft

11.6 1.07 15 1.39

23.2 2.15 30 2.79

34.8 3.23 45 4.18

2

m

2

ft

2

m

a

Printed in U.S.A. 1/10 © Copyright 2010 Schneider Electric All Rights Reserved. F-12586-11

Table-2 Specifications.

Maximum Force

Return

Part Number

Nominal

Operating

Range

Starting

Pressure

Nominal

Stroke

a

Stroke

Based on

1.5 psi

(10 kPa)

Pressure

to

Actuator

15 psi

(103 kPa)

Supply

Dual Press.

System

psig kPa psig kPa in. (mm) lb. N lb. N lb. N lb. N lb-in. N-m lb-in. N-m lb-in. N-m

3 (76)

MK-3101-108 3-7.2 21-50 3 ± 1 21 ± 7

MK-3101

MK2-3101

MK4-3101

MK-3111

MK2-3111

3-8 21-55 3 ± 1 21 ± 7

e

3-8 21-55 3 ± 1 21 ± 7 12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

5-10 34-69 5 ± 1 3 ± 7 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK4-3111 5-10 34-69 5 ± 1 34 ± 7 28 125 28 125 40 178 80 356 49 5.54 49 5.54 49 5.54

MK-3121

MK-3121-109

MK2-3121

8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 79 21 2.37 21 2.37

e

Adjustable

2 to 4 (51

to 102)

3 1/2 (89)

Adjustable

2 to 4 (51

to 102)

12 53 50 226 62 276 102 454 18 2.03 18 2.03 18 2.03

12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

MK4-3121e8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 79 28 3.16 91 10.28

MK-3141

MK4-3141

MK-3151

MK-3161

e

11-17

3-13 21-90

3-6

21-41

9-12

62-83

3-6

21-41

76-117

MK-3201 3-8 21-55 3 ± 1 21 ± 7 90o
MK-3211 5-10 34-69 5 ± 1 34 ± 7 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK-3221 8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 .79 21 2.37 21 2.37

MK-3311-109 5-10 34-69 5 ± 1 34 ± 7 3-1/2 (89)

MK-3321-102 8-13 55-90 8 ± 1 55 ± 7 52 231 4 18 16 71 56 249 7 .79 21 2.37 21 2.37

MK-3801

MK4-3801

3-8 21-55 3 ± 1 21 ± 7

e

MK-3811 5-10 34-69 5 ± 1 34 ± 1 28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

MK4-3811 5-10 34-69 5 ± 1 34 ± 1 28 125 28 125 40 178 80 356 49 5.54 49 5.54 49 5.54

MK-3821 8-3 55-90 8 ± 1 55 ± 1 52 231 4 18 16 71 56 249 7 79 21 2.37 21 2.37

MK4-3821e8-13 55-90 8 ± 1 55 ± 1 52 231 4 18 16 71 56 249 7 79 28 3.16 91 10.28

MK-3841

MK4-3841

a

Factory setting required for published operating range.

b

Force and torques based on factory set stroke and starting pressure.

c

Nominal torque for actuators without positive positioner is based on 1.5 psi pressure change at the actuator.

d

Adjust pressure reducing valve so that listed pressures are available at the actuator.

e

Factory installed positive positioner (AK-42309-500) start point adjustable 2 to 10 psi with range adjustable 2 to 10 psi.

e

3-13 21-90

3

non-adj

3-6

3-6

3

non-adj

21

non-adj

21 to

41

21 to

41

21

non-adj

2-3/4 (70)

Adjustable

2 to 2-3/4
(51 to 70)

Rotation
Typical,

Adjustable

1.2 to 4.4

(30 to 111)

Adjustable

2 to 4 (51

to 102)

3-1/2 (89)

Adjustable

2 to 4 (51

to 102)

12 53 4 18 16 71 56 249 7 79 21 2.37 21 2.37

12 53 12 53 24 107 64 285 21 2.37 21 2.37 21 2.37

12 53 0 0 0 0 24 107 0 0 0 0 21 2.37
12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

28 125 28 125 40 178 80 356 21 2.37 21 2.37 21 2.37

12 53 44 196 56 249 96 427 21 2.37 21 2.37 21 2.37

12 53 4 18 16 71 56 249 7 79 21 2.37 21 2.37

b

Power Stroke

15 psi

(103 kPa)

Supply

Single
Press.

d

System

20 psi

(138 kPa)

Supply

Single or

Dual Press.

System

15 psi

(103 kPa)

Supply Dual

Press.

System

Nominal Torque

Proportional Control

15 psi

(103 kPa)

Supply

Single Press.

System

c

b

20 psi

(138 kPa)

Supply

Single or

Dual Press.

System

d

2 © Copyright 2010 Schneider Electric All Rights Reserved. F-12586-11

Figure-1 MK-3100 Series Dimensions.

Mounting plate for MK-3101-108 and MK-3300-102
Series Actuators

Figure-2 MK-3200 Series Dimensions.

1

Figure-3 MK-300 Series Dimensions2.

1.

All dimensions shown in the Instruction Sheet are in inches.

F-12586-11 © Copyright 2010 Schneider Electric All Rights Reserved. 3

Figure-4 MK-3800 Series Dimensions.

2.

Typical Model shown. Linkage, and air connection details may vary from

Model to Model.