Schneider Electric MK-7101 Catalog Page
MK-71xx Series, MK4-71xx
Damper Actuators, Proportional
For proportional pneumatic actuator with 20 sq. in.
(129 cm
and air valves in heating, ventilating, and air
conditioning systems.
Features:
• Rugged cast aluminum body.
• Completely enclosed spring.
• Long lasting rolling diaphragms.
Model Chart
2
) effective area used to control damper
Model No.
Nominal
Operating
Range
Starting
Pressure
Adjustable
to Actuator
Return
Stroke
Based on
1.5 psi
Pressure
Maximum Force
Power Stroke
15 psi
Supply
Dual Press.
System
a
15 psi
Supply
Single
Press.
System
Single or
Dual Press.
c
System
20 psi
Supply
c
b
20 psi
Supply
Single or
Dual
Press.
System
c
Nominal Torque
Proportional Control
15 psi
Supply
Dual
Press.
c
System
15 psi
Supply
Single
Press.
System
psig psig lb lb lb lb lb-in. lb-in. lb-in.
MK-7101
MK-7121
MK4-7121
a
Force and torques based on factory set stroke and starting pressure.
b
Nominal torque for actuators without positioner is based on 1.5 psi (10 kPa) pressure change a t the actuator. MK-7121 requires 15 psi (103 kPa) be
available to actuator.
c
Adjust pressure reducing valve so that listed pressures are available at the actuator. MK4-7121 requires 20 psi (138 kPa) be available to actuator.
d
Factory installed positive positioner (AK-423 09-500) start point adjustable 1 to 12 psi (7 to 83 kPa) with span adjustable 2 to 13 psi (14 to 90 kPa ).
d
3 to 8 3 ±5 30 110 140 240 67.5
8 to 13 8 ±0.5 130 10 40 140 22.5
67.5 67.5MK4-7101
90 293
12
© Copyright 2008 TAC. All Rights Reserved. F-27383-2
MK-71xx Series, MK4-71xx
Specifications
Construction
Housing Die cast aluminum.
Diaphragm Replaceable beaded molded neoprene.
Stroke Nominal 4-1/2 in. (114 mm), adjustable 4 to 5 in. (102 to 127 mm).
Nominal Damper Area Actuator sizing should be done in accordance with damper manufacturer’s specifications.
Start point Adjustable, refer to Description Model Chart.
Spring Retracts actuator crank arm 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).
Air connections 1/8 in. FNPT.
Mounting In any position.
Dimensions 17-5/8 H x 7-3/4 W x 7-5/8 D in. (448 x 197 x 194 mm).
Accessories
Part Number Description
AK-42309-500 Positive positioner and linkage.
AM-301 90 degree mounting bracket for floor mounting.
a
AM-530
AM-532 Bolt-on frame lug and damper blade clip kit.
AM-538 Actuator brace kit.
AM-542 Rod end connector for 5/16 in. (10 mm) rod.
AM-543 Actuator shaft extension.
TOOL-095-1 Pneumatic calibration tool kit.
Maintenance Parts
AM-533 Actuator shaft extension.
AM-534 Pivot stud.
AM-535 Clevis kit.
AM-541 Clevis kit.
AM-536 Mounting plate.
AM-538 Brace kit.
AM-542 Rod end connector.
PND-90 High temperature diaphragm.
PND-202 Diaphragm.
PND-245-103 Green, 3 to 8 psi spring.
PND-245-108 Blue, 8 to 13 psi spring.
a
Required to connect damper actuator to dam per.
b
Maximum length of 5/16 in. (8 mm) rod which can be used with AM-542, 15 in. (381 mm).
Crank arm for 1/2 in. diameter damper shaf t. Holes for 4-1/2 in. stroke.
b
F-27383-2 © Copyright 2008 TAC. All Rights Reserved. 13
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