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Damper Actuator
80
customer.honeywell.com
70-6925
MP918A,B Pneumatic Damper Actuators
Used for proportional control of medium- to large-size dampers in
HVAC systems. The MP918A,B are rolling diaphragm, piston-type
actuators. The MP918A has a positive positioner. Replacement
devices are available for Johnson, Powers, Robertshaw, Barber-
Colman, and older Honeywell actuator models.
•
Rolling diaphragm operated.
•
Low friction shaft bearing.
•
Close tolerance on operating range and stroke.
•
Versatile mounting and connecting hardware.
•
Non-overlapping spring ranges for sequencing.
•
Reliable-long life.
Dimensions in inches (millimeters)
Actuator with External Trunnion Mounting Bracket
Dimensions in inches (millimeters)
Actuator with Internal N.C. Trunnion Mounting Bracket
Dimensions in inches (millimeters)
Actuator with Internal N.O. Trunnion Mounting Bracket
MP918A and B Typical Piping
Actuator Type:
Damper
Fail Safe Mode:
Spring Return
Actuator Force:
High
Diaphragm Effective Area:
23.8 sq in. (154 sq cm)
Stroke:
3 1/2 in. (90 mm)
Humidity Range:
5 to 95% RH
Accessories:
14004062-001
External Trunnion Mounting Bracket
14004062-002
Internal N.C. Trunnion Mounting Bracket
14004062-003
Internal N.O. Trunnion Mounting Bracket
14004106-001
Actuator pushrod for conversion of internal N.C. to
external
14004107-001
Crankarm Assembly for conversion from internal N.C. to
external Trunnion mounting
14004210-001
Feedback Spring Kit includes orange spring (3 psi
[21kPa]), yellow spring (5 psi [34 kPa]), and blue spring (10 psi [69
kPa]).
14004241-002
Hitch Pin (Six Sets)
14004242-001
MP918 Top Mount Operator Assembly
14004667-001
Offset Crank arm assembly with 2 screws (304725-062),
nuts (14004102-001), crank arm (14004655-001) for 1/2 in. Drive Axle
14004264-001
MP918 Repair kit including Positive Positioner, bracket
assembly and fittings
14004236-001
Coupler, actuator shaft to 5/16 in, 8 mm, pushrod
CCT2718
Threaded rod for shaft extension
CCT2725
Rod coupling for shaft extension
Replacement Parts:
14004264-002
MP918 Positive Positioner Retrofit Kit - includes 10 psi
feedback spring
18-1/4 (465) MP918B
6-7/8
(175)
4 (102)
MIN.
M27099
20-1/2 (520) MP918A
14004062-001
1-7/16
(36)
M27100
8-1/2
(215)
MP918B
10-7/8
(275)
MP918A
3/8 (10) CLEARANCE
18-3/4 (475) MP918B
21 (535) MP918A
14004062-002
M27101
8 (205)
MP918B
10-3/8
(265)
MP918A
18-3/4 (475) MP918B
21 (535) MP918A
14004062-003
3-3/8
(86)
REF.
B
M
P
M
MP918B
MP918A
FROM
CONTROLLER
M5576
SECTIONS OF LARGE DAMPER REQUIRING
MORE THAN ONE OPERATOR MUST BE LINKED
1
1
Содержание VP525C
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