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Instruction Manual
Form 5062
May 2008
W4742-1/IL
Figure 2. Typical Type 1052 Actuator Adjustable Spring Seat
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.
Description
The Type 1051 and 1052 diaphragm rotary actuators
are pneumatic spring-return actuators for use with
rotary-shaft control valves. The Type 1051 actuator
can be used for on-off service, or it can be used for
throttling service when equipped with a valve
positioner. The Type 1052 actuator can be used for
on-off service, or it can be used for throttling service
when equipped with or without a valve positioner.
The Type 1052 actuator spring is adjustable (see
figure 2).
SPRING
SPRING SEAT
SPRING ADJUSTER
Note
1051 & 1052 F & G Actuators
Table 2. Approximate Actuator Weights
TYPE 1051
SIZE
SIZE
Kg
Lb
40
43
94
60
89
197
70
– – –
– – –
Specifications
Specifications are shown in table 1. Specifications
for actuator operation, as it originally comes from the
factory, are stamped on the nameplate attached to
the actuator.
Installation
When an actuator and valve body are shipped
together, the actuator is normally mounted on the
valve. Follow the valve body instructions when
installing the control valve in the pipeline, and then
perform the procedures presented in the Loading
Connection section. If the actuator is shipped
separately or if it is necessary to mount the actuator
on the valve, perform the procedures presented in
the Actuator Mounting section. And, if the actuator
requires a pipe-away vent, or if a retrofit pipe-away
kit needs to be installed, refer to the Pipe-Away Vent
section.
Always wear protective gloves,
clothing, and eyewear when
performing any installation operations.
Be aware of pinching parts during
installation operations.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
If installing into an existing
application, also refer to the WARNING
at the beginning of the Maintenance
section in this instruction manual.
TOP-MOUNTED
TYPE 1052
HANDWHEEL
Kg
Lb
Kg
45
99
7.3
92
203
11
123
272
21
WARNING
Lb
16
24
47
3
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