Product Overview

ManualsBrandsBarber Colman ManualsDampers4" Post Mount Damper Actuator w/ Positioner (8-13 PSI)

APPLICATION

The M556 piston damper actuator, post mounted, is designed

for use in a pneumatic control system to position an air control

damper in response to a signal from a pneumatic controller.

These actuators can be used for either proportional or two

position applications. Other applications include the control of

variable fan inlet vanes, centrifugal refrigeration compressor

inlet vanes, and butterfly valves.

The M573 and M574 Series Piston 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 can be used for either proportional or

two position applications.

The M573 and M574 actuators are equipped with right angle

brackets and are adaptable to air conditioning, multi-zone,

heating, ventilating, fan coil units, unit ventilators, and mixing

boxes.

SPECIFICATIONS

Construction:

Housing, Glass filled nylon.

Diaphragm, Neoprene, rolling type.

Stroke: See Table-1.

Spring: Retract actuator shaft on loss of air pressure.

Maximum Damper Area: See Table-2.

Environment:

Ambient Temperature Limits, -20 to 140 °F (-29 to

60 °C).

Supply Air Pressure: Clean, dry, oil free air required (ref.

EN-123).

Nominal, 20 psig (138 kPa).

Maximum, 30 psig (207 kPa).

Air Consumption (Positioner Models): 0.017 scfm.

Connections: Barbed fitting for 1/4" O.D. plastic tubing.

Mounting: See Mounting Instructions.

Dimensions: See Figures-2, 3 & 5.

ACCESSORIES & REPLACEMENT PARTS

AM-111 Slotted crank arm for 5/16" shaft

AM-112 Slotted crank arm for 3/8" shaft

AM-113 Slotted crank arm for 1/2"

AM-115 Slotted crank arm for 7/16"

AM-122 Straight connector

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

N800-0555-P Positioner kit with 5 & 10 psi springs

N800-1414 3-hole crank arm for 3/8" shaft

N800-1415 3-hole crank arm for 1/2" shaft

M556, M573, M574 Series

Piston Damper Actuators

General Instructions

Summary of content (8 pages)

PAGE 1
M556, M573, M574 Series Piston Damper Actuators General Instructions APPLICATION The M556 piston damper actuator, post mounted, is designed for use in a pneumatic control system to position an air control damper in response to a signal from a pneumatic controller. These actuators can be used for either proportional or two position applications. Other applications include the control of variable fan inlet vanes, centrifugal refrigeration compressor inlet vanes, and butterfly valves.
PAGE 2
Table-1 Specifications. 3" Stroke (7 sq.in.) 4" Stroke (11 sq.in.) 6" Stroke (24.8 sq.in.
PAGE 3
POSITIVE POSITIONER ADJUSTMENT Span Whenever feasible, an M556 piston actuator operating an air control damper should be mounted external to a duct by means of its standard swivel post and plate. If necessary, the mounting surface should be reinforced to withstand the stroke force of more than 700 pounds that the M556 can exert. The signal pressure change required to produce full actuator stroke is determined by the feedback spring. Cataloged models are supplied with factory installed 5 psi springs.
PAGE 4
b. For a normally open damper, apply air pressure to the actuator equal to the high end of its spring range, e.g.: 13 psig (90 kPa) for an 8 to 13 psig (55 to 90 kPa) spring, then close the damper blades against their stops. Clamp the crank arm to the extension shaft as described above. Signal pressure above the spring range will then provide additional close-off force. Figure-2 M556 Actuator Mounting Dimensions & External Installation Detail.
PAGE 5
bracket has two (2) locator holes (dimension E in Figure-3) for 3" (76 mm) stroke actuators and two (2) locator notches (dimension F in Figure-3) for 4" (102 mm) stroke actuators; the choice of a locator being based on whether clockwise or counterclockwise rotation is required as the piston shaft is extended by increasing signal pressure.
PAGE 6
Figure-4 Typical M573/M574 External Actuator Mounting (M574 Shown). MAINTENANCE Regular maintenance of the total system is recommended to assure sustained optimum performance. REPAIR See Replacement Parts and Accessories. 6 © Copyright 2008 TAC All Rights Reserved.
PAGE 8
Copyright 2008, TAC All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change without notice. F-23936-3 TAC 1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940 www.tac.