Fisher 1052 Spring Return Diaphragm Rotary Actuator
Fisher 1052 spring-return diaphragm rotary actuators operate
splined shaft rotary valves and are suitable for on/off or
throttling service. Designed for easy installation of a broad range
of options: limit switches, position indicating switches,
positioners, and manual over-rides.
The primary difference between these actuators is that the 1052
actuator has a spring adjuster which means it may be used with or
without a positioner, depending on service requirements. The 1051
actuator, in throttling service, is normally equipped with a valve
positioner. Refer to separate bulletins for valve and positioner
information.
Both actuator types are designed for easy installation of a broad
range of options: limit switches, position indicating switches,
positioners, and manual over-rides. Option applicability varies
with actuator size. Refer to the specifications table and table 4
for
information concerning option applicability and specifications.
Features
Application Flexibility—Type 1051 and 1052 rotary actuators are available with fail-open or
fail-close construction and can be mounted in any of four
actuator-valve mounting positions. For mounting positions. These
actuators can be mounted on a broad range of Fisher_ valves (style
F or G mounting), or used with other equipment (style H or J
mounting).
Minimal Dead Band—Single joint linkage with splined and clamped lever minimizes lost
motion and improves control accuracy.
Long Service Life—Rugged construction provides stability, corrosion resistance, and
protection from deformation should over-pressurization occur.
Safety—Actuator-valve linkage is completely enclosed, yet the valve
packing adjustment remains accessible without removing any
parts.For safety during disassembly, spring
compression is controlled on the Type 1051 actuator. The Type 1052
actuator has an externally accessible spring adjuster to relieve
spring compression.
| Actuation | Spring-return, Quarter-turn, Rotary |
| Control Type | On/Off, Throttling |
| Power Source | Pneumatic |
| Valve Type | Ball Valve, Butterfly Valve, Eccentric Plug Valve, Triple Offset
Valve |
Available Configurations
Type 1051: For on-off service or for throttling
Type 1052: For on-off service without a positioner or for throttling services
with or without
a positioner.
Direct Acting: Increasing loading pressure extends the diaphragm rod out of the
spring barrel.
Actuator Sizes
Type 1051: Size 33, Size 40, and Size 60
Type 1052: Size 20, Size 33, Size 40, Size 60, and Size 70
Standard Diaphragm Pressure Ranges
Sizes 20 and 60: 0 to 1.2 bar (0 to 18 psig), 0 to 2.3 bar (0 to 33 psig), and 0 to
2.8 bar(0 to 40 psig)
Sizes 33 and 40: 0 to 1.2 bar (0 to 18 psig), 0 to 2.3 bar (0 to 33 psig),
0 to 2.8 bar(0 to 40 psig), and 0 to 3.8 bar (0 to 55 psig)
Size 70: 0 to 2.3 bar (0 to 33 psig), 0 to 2.8bar (0 to 40 psig), and 0 to
3.8 bar
(0 to 55 psig)
Maximum Diaphragm Sizing Pressure
Size 20: 3.4 bar (50 psig)
Size 33: 3.8 bar (55 psig)
Size 40: 4.5 bar (65 psig)
Size 60: 2.8 bar (40 psig)
Size 70: 3.8 bar (55 psig)
Maximum Diaphragm Casing Pressure
Size 20: 4.1 bar (60 psig)
Size 33: 4.5 bar (65 psig)
Size 40: 5.2 bar (75 psig)
Size 60: 3.4 bar (50 psig)
Size 70: 4.5 bar (65 psig)
