Specifications; Installation - Emerson Fisher 1051 Instruction Manual

Instruction Manual
D101322X012
The 1052 uses an adjustable spring seat to control spring compression. It may be used for on‐off service without a
positioner, or it may be used for throttling service with or without a positioner, depending on service conditions.
A top‐mounted handwheel may be mounted for infrequent service as a manual override. A manual actuator is
recommended for routine and repeated manual operation. Externally adjustable travel stops are used to limit the
degree of rotation at both ends of the actuator stroke. Provisions are included for integral mounting of optional
magnetic proximity switches. Lever‐operated, mechanical switches are also available.
The lever for the 1051 and 1052 size 33 actuator is supported by bushings. The lever may be changed to
accommodate valve bodies with different size valve shafts and different mounting adaptations. Levers and accessories
are available for mounting valve bodies and equipment with the following mounting adaptations:
F and G mounting adaptations (figures 9 and 10) are for use with Fisher splined‐shaft rotary valve bodies with 12.7,
15.9, and 19.1 mm (1/2, 5/8, and 3/4 inch) valve shaft diameters. A stub shaft is available for installation on the end of
the lever opposite the valve body for use as a wrench‐operated extension (for emergency override) or as a means of
connecting a manual actuator (see figure 14).
H mounting (figure 11) is for use with non‐Fisher products and user‐provided mounting brackets and shaft couplings.
It includes a mounting surface with threaded holes for attaching the user‐provided mounting bracket. A 22.2 mm (7/8
inch) stub shaft with flats is pinned to the lever and is used to couple the actuator to the operated equipment. A
second stub shaft may be installed on the opposite end of the lever for use as a wrench‐operated extension (for
emergency override) or as a means for connecting a manual actuator (see figure 14). Stub shafts are available in
standard and reverse constructions (see figure 12) to provide proper operation with the mounting position and
actuator action desired (see figure 2).
J mounting (figure 13) permits use of the actuator with Fisher keyed‐shaft valve bodies and other keyed‐shaft
equipment with 9.5, 12.7, and 15.9 mm (3/8, 1/2, and 5/8 inch) shaft diameters. A stub shaft is pinned to the lever and
a valve shaft coupling is pinned to the stub shaft. The coupling has multiple keyways (see figure 4) to accommodate
mounting in the desired position. A second stub shaft may be installed on the opposite end of the lever for use as a
wrench‐operated extension (for emergency override) or as a means for connecting a manual actuator (see figure 14).
Table 2. Bolting Torque Requirements
DESCRIPTION KEY NUMBER
Diaphragm Casing 5
Travel Stop 8
Diaphragm to rod 9
Rod end to lever 18
Housing to yoke 23
Housing to cover 34
Yoke to valve 71
Clamped lever 28
Switch Nut 78
1. Exceeding any torque requirements could damage the actuator and impair safe operation.

Specifications

Specifications are shown in table 1 for 1051 and 1052 size 33 actuators. Some specifications for a given actuator as it
originally comes from the factory are stamped on a metal nameplate attached to the actuator.

Installation

WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations.
(1)
BOLT SIZE
3/8‐24
7/16‐14
3/8‐24
3/8‐16
5/16‐18
5/16‐18
3/8‐16
3/8‐16
3/8‐16
1051 and 1052 Size 33 Actuators
TORQUE
S
N m
27
27
54
54
41
41
(See appropriate valve instruction manual)
54
27
June 2017
S
Lbf ft
20
20
40
40
30
30
40
20
3