Product Overview

M556 Series (2466 Series), M572 Series (2472 Series), M573 Series (2473
Series), M574 Series (2474 Series)
42
Pneumatic Damper Actuators
Model Chart
These actuators are designed for use in pneumatic
control systems to position air control dampers in
response to signals from pneumatic controllers.
The M556 is a large swivel-mounted actuator with
an adjustable crank arm having a clamp to fit a
1/2 in. O.D. damper shaft.
The M570 Series damper actuators are used in
pneumatic control systems to position automatic
air dampers upon receipt of an air pressure signal
from a control device. These actuators are
equipped with right angle brackets and are
adaptable to air conditioning, multi-zone, heating,
ventilating, fan coil units, unit ventilators, mixing
boxes, and VAV terminal boxes. M573 and M574
are also available as post-mounted actuators.
The M583 is used in classroom type unit
ventilators. Special mounting kits are available for
adapting the actuator to the various makes and
models of classroom type units. The M584 is
designed for use on large volume unit ventilators.
An internal spring arrangement permits the
actuator to operate gradually to a preset
percentage of total stroke, hesitate for a preset
pressure range, and then complete its full travel.
When combined with other control devices, these
actuators may be adjusted to perform as required
by ASHRAE control cycles for unit ventilators.
Features:
• Rigid, corrosion-resistant glass-filled nylon bodies.
• M556, M573 and M574 have 303 stainless steel shafts.
• M556, M573 and M574 available with or without
N800-0555 (2850-xxx) positioner.
2 in. Stroke (3 sq. in.).
Model No.
Spring Range
psig
Mounting Description
M572-2308
3 to 12
Right-angle
Actuator with ball joint to accept 5/16 in. push rod.
M572-2311 Actuator with complete linkage for 1/2 in. damper shafts.
M572-8308
4 to 8
Actuator with ball joint to accept 5/16 in. push rod.
M572-8311 Actuator with complete linkage for 1/2 in. damper shafts.
M572-3308
5 to 10
Actuator with ball joint to accept 5/16 in. push rod.
M572-3311 Actuator with complete linkage for 1/2 in. damper shafts.
M572-5308
8 to 13
Actuator with ball joint to accept 5/16 in. push rod.
M572-5311 Actuator with complete linkage for 1/2 in. damper shafts.
M572-6308
10 to 15
Actuator with ball joint to accept 5/16 in. push rod.
M572-6311 Actuator with complete linkage for 1/2 in. damper shafts.
M556
Series
(2466
Series),
M572
Series
(2472
Series),
M573
Series
(2473
M556
Shown with Positive Positioner
M572/M573/M574
Right Angle Mounted
Shown without Positive Positioner
M573/M574
Post Mounted Actuator
Shown with N800-0555
Positive Positioner