TAC Pneumatic Products Catalog

MK-3xxx Series, MK4-3xxx Series
Pneumatic Damper Actuators
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.
Features:
• Rugged cast aluminum bodies.
• Long lasting rolling diaphragm.
• Provisions for adjustable stroke-stop.
Model Chart
Model No.
Nominal
Operating
Range
Starting Pressure
a Factory setting required for published operating range.
Nominal
Stroke a
psig kPa psig kPa in. (mm)
MK-3101 3 to 8 21 to 55 3��1 21��7 3-1/2 (89),
adjustable
MK-3111 5 to 10 34 to 69 5��1 34��7
2 to 4
(51 to 102)
b Force and torques based on factory set stroke and starting pressure.
Return
Stroke
Based on
1.5 psi
(10 kPa)
Pressure
to
Actuator
Maximum Force b
15 psi
(103 kPa)
Supply
Dual
Press.
System
Power Stroke
15 psi
(103 kPa)
Supply
Single
Press.
System d
c Nominal torque for actuators without positive positioner is based on 1.5 psi pressure change at the actuator.
lb
(N)
12
(53)
28
(125)
d Adjust pressure reducing valve so that listed pressures are available at the actuator.
MK-31xx Series
20 psi
(138 kPa)
Supply
Single or
Dual
Press.
System d
15 psi
(103 kPa)
Supply
Dual
Press.
System
Nominal Torque c
Proportional Control b
15 psi
(103 kPa)
Supply
Single
Press.
System d
20 psi
(138 kPa)
Supply
Single or
Dual
Press.
System d
48 © Copyright 2006 TAC. All Rights Reserved. F-27383-1
lb
(N)
44
(196)
28
(125)
lb
(N)
56
(249)
40
(178)
lb
(N)
lb-in.
(N-m)
96
(427) 21
80
(356)
MK-38xx Series
(2.37)
lb-in.
(N-m)
21
(2.37)
lb-in.
(N-m)
21
(2.37)
MK-3xxx
Series,
MK4-3xxx
Series