Management of Change
Replacement of Fisher™ 1052 Actuators
with 2052 Actuators
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
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Comparison of 1052 and 2052 Actuators ........4
Compact Design ................................................................. 4
Simplied Sizing and Selection ........................................... 5
External Travel Adjustment ................................................. 7
Compatibility and Mounting ............................................... 7
Bench Set ........................................................................... 8
Mounting Orientations ....................................................... 8
Options .............................................................................. 9
Conclusion ......................................................9
Additional Resources .....................................10
Management of Change
Management of Change (MOC) is a procedure used to proactively manage changes
that have the potential to impact safety or the process within a plant. Evaluating
new techniques for improving MOC approval procedures can have an impact on
plant efciency. Historically, upgrading obsolete products or replacing existing
process control equipment had been delayed or abandoned due to the extensive
paperwork involved in completing a complex MOC approval sheet.
Background
Emerson Automation Solutions introduces the Fisher 2052 spring-and-diaphragm
rotary actuator. The small, compact Fisher 2052 actuator reduces valve/actuator
envelope dimensions to provide greater valve installation versatility for both skids
and tight processing lines where space is at a premium.
The Fisher 2052 actuator can be installed on rotary-shaft valve bodies for throttling
or on-off applications. The actuator linkage features a clamped shaft lever and a
single pivot point to reduce lost motion between the actuator and valve. The result
is a 0.5% or less typical variability for a Fisher rotary control valve assembly.
MOC: 2052 Actuators
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In addition to its compact size, the Fisher 2052 actuator delivers several operations
and maintenance advantages. It has an inherent fail-safe position on loss of
operating air. In contrast to piston style actuators that rely on O-ring seals, the
double-sided diaphragm in the 2052 provides extended service life. **
The Fisher 2052 actuator offers a nested spring design that requires no bench set
adjustment, simplifying the actuator selection process. Powder paint coating is
standard and offers an excellent corrosion-resistant nish on all external steel and
cast iron parts. The Fisher 2052 actuator is available in three sizes, accommodating
shaft sizes 12.7 to 38.1 mm (1/2 to 1-1/2 inch).
Contained in this document are two sections. First is a question and answer section
to help end-users complete Management of Change approval documents when
upgrading to a 2052 actuator. Secondly, there is a comparison of the Fisher 2052
and 1052 actuators. In this section, in addition to the similarities between these
two actuators, you will see a number of advantages the 2052 design has compared
to the 1052 design. These comparisons demonstrate why we believe the 2052
actuator will become the standard in rotary pneumatic actuation.
Question & Answer Checklist
Q: Does the proposed modication cause any changes to the piping and
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instrumentation diagram (P&ID)?
A: No. There will be no change in the existing P&IDs.
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Q: Does the proposed modication change process chemistry,
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technology, or operating and control philosophies?
A: No.
Q: Does the proposed modication change how the existing plant is
operated?
A: No.
Q: Does the proposed modication change process ows?
A: No. The modication does not change the process ow direction.
Q: Does the proposed modication change existing pressure relief cases?
A: No.
MOC: 2052 Actuators
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Q: Does the proposed modication change the process description?
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A: No.
Q: Have the codes and standards to which the new equipment was
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designed changed?
A: No.
Q: Does the proposed modication change the materials of construction,
such as a change in material form (cast, forged, or alloy)?
A: No.
Q: Does the proposed modication introduce new equipment items that
require periodic predictive maintenance?
A: No. The new equipment items will require the same periodic
maintenance as required by the old equipment items.
Q: Does the proposed modication change existing operator training
requirements?
A: Yes. The Emerson network of Local Business Partners and sales ofces
offer local training and support to ensure operators, maintenance
personnel, and instrument technicians are fully trained on the 2052
pneumatic actuator.
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