Damper Actuator
74 customer.honeywell.com 70-6925
MP909D Pneumatic Damper Actuator
Used for pneumatic proportional control of variable volume
terminal units and small damper. Available in various operating
ranges for either individual or sequence operation with other
actuators. Replacement devices are available for Johnson,
Powers, Robertshaw, and older Honeywell actuator models.
• Rugged ribbed aluminum body.
• Low-friction shaft bearing.
• Close tolerance on operating range and stroke.
• Protected barb connector.
• Versatile mounting and connecting hardware options.
• Positive leakproof seal.
Dimensions in inches (millimeters)
MP909D Piping Diagram
MP909D Ball Joint Linkage
Actuator Type: Damper
Actuator Force: Low
Fail Safe Mode: Spring Return
Temperature Range:
50 F to 140 F (10 C to 60 C)
Maximum Operating Pressure: 30 psi (207 kPa)
Humidity Range: 5 to 95% RH
Accessories:
14002850-001 Angle Bracket 5 3/8 in, 137 mm, long, 5 in, 127 mm,
wide
14003640-001 Angle Bracket 3 in. (76 mm) long, 3 3/4 in. (95 mm)
wide, 2 3/4 in. (70 mm) high
26025B Damper crank arm for 3/8 in. (9.5 mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 40-50-60-75-90
degrees.
27174B Damper crank arm for 7/16 in. (11.1 mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 40-50-60-75-90
degrees.
27520C Push Rod (5/16 in. dia., 12 in. length)
27520G Push Rod (5/16 in. dia., 24 in. length)
27520K Push Rod (5/16 in. dia., 36 in. length)
27520L Push Rod (5/16 in. dia., 48 in. length)
312867C Damper Crank Arm for 1/2 in. (12.7mm) diameter axle.
Elongated slot for linkage connection. Slot scaled for 45-60-75-90
degrees
315321 Crankarm Balljoint (with 1/4 in male threads), fits 5/16 in.
diameter pushrod
315781 Motor shaft balljoint with 3/8 - 16 UNC female threads, fits 5/16
inch diameter pushrods.
1/4 DIA (6)
1/2 (13)
1-3/16
(46)
5-11/16 (145)
2-3/8
(61)
OR
1-1/16
(27)
3/8-16 UNC-2A
13/16 (20) LONG
MIN.
C484-2
MP909D
M
M5577
DISCHARGE
AIR
PRIMARY
AIR
ROOM
THERMOSTAT
VARIABLE VOLUME
AIR TERMINAL UNIT
DAMPER
AXLE
SETSCREW
CRANKARM
BALLJOINT
5/16 in.
PUSHROD
MOUNTING
BRACKET
LOCKNUT
OPERATOR SHAFT
M16438
MOTOR
SHAFT
BALLJOINT
INLET
PORT
CRANKARM
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