Brochure
MK-3xxx Series, MK4-3xxx Series
F-27383-1 © Copyright 2006 TAC. All Rights Reserved. 49
Model Chart (Continued)
Specifications
Model No.
Nominal Operating
Range
Starting Pressure
Nominal
Stroke
a
a
Factory setting required for published operating range.
Maximum Force
b
b
Force and torques based on factory set stroke and starting pressure.
Nominal Torque
c
Proportional Control
b
c
Nominal torque for actuators without positive positioner is based on 1.5 psi pressure change at the actuator.
Return
Stroke
Power Stroke
Based on
1.5 psi
(10 kPa)
Pressure
to
Actuator
15 psi
(103 kPa)
Supply
Dual
Press.
System
15 psi
(103 kPa)
Supply
Single
Press.
System
d
d
Adjust pressure reducing valve so that listed pressures are available at the actuator.
20 psi
(138 kPa)
Supply
Single or
Dual
Press.
System
d
15 psi
(103 kPa)
Supply
Dual
Press.
System
15 psi
(103 kPa)
Supply
Single
Press.
System
d
20 psi
(138 kPa)
Supply
Single or
Dual
Press.
System
d
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)
MK-3121
8 to 13 55 to 90 8r155r7
3-1/2 (89),
adjustable
2 to 4
(51 to 102)
52
(231)
4
(18)
16
(71)
56
(249)
7
(0.79)
21
(2.37)
21
(2.37)
MK4-3121
e
e
Factory installed positive positioner (AK-42309-500) start point adjustable 2 to 10 psi with span adjustable 2 to 10 psi.
28
(3.16)
91
(10.28)
MK-3141 3 to 13 21 to 90 3 non-adj.
21
non-adj.
12
(53)
21
(2.37)
21
(2.37)
MK-3151
3 to 6,
9 to 12
21 to 41,
62 to 83
3 to 6 21 to 41
2-3/4 (70),
adjustable
2 to 2-3/4
(51 to 70)
12
(53)
24
(107)
64
(285)
21
(2.37)
MK-3161
3 to 6,
11 to 17
21 to 41,
76 to 117
0
(0)
0
(0)
24
(107)
0
(0)
0
(0)
MK-3821 8 to 13
55 to 90 8r155r1
3-1/2 (89),
adjustable
2 to 4
(51 to 102)
52
(231)
4
(18)
16
(71)
56
(249)
7
(0.79)
21
(2.37)
MK4-3821
e
8 to 13
28
(3.16)
91
(10.28)
Construction
Housing Die cast aluminum.
Diaphragm Beaded molded neoprene.
Stroke Refer to Model Chart.
Nominal Damper Area Actuator sizing should be done in accordance with damper manufacturer’s specifications.
Start point Adjustable on most models r1 psi, refer to Model Chart.
Spring Retracts actuator shaft on loss of air pressure.
Maximum air pressure 30 psig (207 kPa).
Ambient temperature limits
Shipping -40 to 160qF (-40 to 71qC).
Operating -20 to 160qF (-29 to 71qC).
Air connections 1/8 in. FNPT.
Mounting
In any position. Mounting bracket (except MK-3300 Series end mounting) and connector for 5/16 in.
(8 mm) diameter push rod included with actuator.
Dimensions
MK-3100, MK4-3100 Series 12 L x 5-7/8 W x 5-1/2 D in. (305 x 149 x 140 mm).
MK-3800 Series 20-3/16 L x 7-1/4 W x 6-1/2 D in. (513 x 184 x 165 mm).