Honeywell MO953 Series, Service Data, Page: 3 / 24

DESCRIPTION
The MO953 and MP953 Pneumatic Actuators
(“Actuators”) are used with and Valves and
can control older steam and water valves via adapters. The
Actuators are functionally identical to the
Actuators. Therefore, most of this sheet is
directed to the MP953 Actuators.
and B Actuators use a Gradutrol Relay for
positioning, and the and Actuators use a
positive positioner. The relay and the positioner function in
essentially the same way. Positivepositionerretrofitkitsare
available for
and B Actuators (see
ACCESSORIES).
APPLICATION
These Actuators operate the and Valves
and certain other coil, line, and zone valves that
GENERAL
proportionally control steam or hot and cold liquids in
HVAC systems.
SPECIFICATIONS
MODELS:
with Gradutrol Relay
with Gradutrol Relay
without positioner
without positioner
with positive positioner
with positive positioner
MAXIMUM SAFE AIR PRESSURE
25 psi (172
See Table 1 for additional specifications.
Table Specifications.
MP953 I MO953 I Size in
Device Type Active Inactive A c t i v e I n a c t i v e I n . ( m m )
a c t i n g
A1087 A1004 A1210
A l 5 (127)
with Gradutrol Al095 A1012 Al228 A2
Relay
All78 A1053 A7
A1202 All86 A1061 A8 13 (330)
with Gradutrol
C l 0 6 7
8 (203)
I
C l 0 7 5
Cl141 5 (127)
C l 1 5 8
(13) 160 (71)
314 (19)
(19)
(38)
(19)
(38)
314 (19)
103)
(13) 2-7 (14-48) No
8-l 2
1 3-91 75-5500