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- Bently Nevada
- 24765-02-01
- Case Expansion Transducer Assembly
- USA
- 88.9 × 117 × 241 mm
- 2.3 kg
- Xiamen, China
- New & In Stock
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- 1 Year
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Product Overview
The Bently Nevada 24765-02-01 is a Case Expansion Transducer Assembly used for monitoring changes in the position of a rotating machine casing relative to a defined reference point. It belongs to the measurement hardware used in machinery monitoring systems where casing movement during startup, operation, load changes, and shutdown needs to be observed.
Case expansion is a mechanical condition that develops as large rotating equipment changes temperature and operating state. The machine casing can move relative to its reference structure as the equipment heats, cools, or responds to changing operating conditions. Monitoring this movement provides information that can be used alongside other machinery measurements when evaluating turbine or other large rotating equipment behavior.
The 24765-02-01 forms part of a larger measurement chain rather than operating as a standalone protection controller. Its mechanical installation establishes the relationship between the transducer and the machine/reference structure, while the resulting measurement is carried through the associated signal wiring to monitoring electronics.
For maintenance and replacement work, the transducer assembly should be considered together with its mounting arrangement, reference point, signal wiring, monitoring hardware, and configured measurement channel. Correct mechanical positioning is particularly important because the measurement depends on the physical relationship between the machine casing and the reference structure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 24765-02-01 |
| Product Type | Case Expansion Transducer Assembly |
| Product Family | Bently Nevada Machinery Monitoring Hardware |
| Series | 24765 Series |
| Component Category | Case Expansion Measurement Hardware |
| System Role | Machine Case Expansion Monitoring |
| Measurement Function | Case Movement / Expansion Measurement |
| Interface Function | Mechanical Movement Sensing |
| Application | Rotating Machinery Monitoring |
| Sensing Arrangement | Displacement Measurement |
| Component Type | Transducer Assembly |
| System Integration | Bently Nevada Machinery Monitoring System |
| Installation | Rotating Machinery Monitoring Installation |
| Dimensions | 88.9 × 117 × 241 mm |
| Weight | 2.3 kg |
Product Features
- Used for monitoring relative movement associated with machine case expansion.
- Supports machinery condition monitoring during changing operating conditions.
- Suitable for applications involving large rotating equipment where casing movement is an important operating parameter.
- Forms part of a Bently Nevada machinery measurement architecture.
- Works with associated signal wiring and monitoring electronics.
- Requires a defined mechanical reference for meaningful displacement measurement.
- Suitable for monitoring casing movement during startup, normal operation, load changes, and shutdown.
- Provides a dedicated transducer assembly for case expansion measurement applications.
- Can be incorporated into broader machinery monitoring and protection arrangements.
- Applicable to maintenance and replacement work on established rotating equipment monitoring installations.
Working Principle
The 24765-02-01 operates by monitoring movement of a machine casing relative to an established reference. As a large turbine, compressor, generator, or similar machine changes temperature and operating condition, the casing can move relative to the supporting structure or reference location.
The transducer assembly detects the applicable displacement between the machine case and the reference arrangement. The resulting measurement is then transferred through the associated signal wiring to monitoring electronics, where the information can be displayed, trended, alarmed, or evaluated as part of the overall machinery monitoring system.
Machine Case Movement → 24765-02-01 → Signal Wiring → Monitoring Electronics → Machinery Monitoring / Protection System
During startup, the machine casing may move progressively as temperatures increase. During steady operation, the measurement can be observed as part of the machine’s normal operating condition. Changes in load, temperature, or operating state can produce corresponding changes in casing position. During shutdown and cooling, the movement can occur in the opposite direction.
The transducer assembly therefore depends on both the sensing element and its mechanical reference arrangement. An incorrectly positioned assembly, damaged mounting point, or disturbed reference can affect the measurement even when the electrical signal path appears normal.
Role in a Bently Nevada Machinery Monitoring Architecture
The 24765-02-01 occupies the measurement layer of a machinery monitoring system. It provides information about machine case movement that can be combined with other measurements such as shaft vibration, shaft position, speed, or bearing condition to give maintenance and control personnel a broader view of rotating equipment behavior.
| System Layer | Typical Component | Function |
|---|---|---|
| Machinery Protection | Bently Nevada Protection System | Evaluates configured machinery measurements and protection conditions |
| Monitoring | Machinery Monitoring Module | Receives and processes measurement information |
| Signal Transmission | Transducer Cable / Signal Wiring | Carries the transducer signal to monitoring electronics |
| Measurement | 24765-02-01 | Measures relative machine case movement |
| Mechanical Reference | Machine Case / Reference Structure | Establishes the physical reference for displacement measurement |
| Rotating Equipment | Turbine / Compressor / Generator | Produces the monitored mechanical movement |
| Maintenance Layer | Engineering / Condition Monitoring System | Supports trending, diagnostics, and maintenance analysis |
Industrial Applications
| Application | Typical Use |
|---|---|
| Steam Turbines | Monitoring casing movement during thermal expansion and operating transitions |
| Gas Turbines | Observing machine case movement as operating temperature and load change |
| Compressors | Supporting condition monitoring of casing movement on large rotating equipment |
| Generators | Monitoring mechanical movement associated with thermal operating conditions |
| Power Generation | Providing case expansion information within broader machinery monitoring systems |
| Industrial Process Equipment | Monitoring large rotating machines where casing movement is operationally significant |
| Rotating Machinery Protection | Supplying displacement information to the machinery monitoring architecture |
| Predictive Maintenance | Supporting condition trending and investigation of changes in machine behavior |
Installation and Maintenance
- Verify the model — Confirm that the 24765-02-01 matches the existing machinery monitoring configuration and required measurement application.
- Review equipment documentation — Check machine drawings, transducer installation details, reference locations, wiring diagrams, and monitoring-channel documentation before replacement.
- Isolate the equipment — Follow the approved plant procedure to place the monitored machine and associated monitoring circuit in a safe maintenance condition.
- Identify the measurement arrangement — Confirm the transducer location, machine reference point, signal cable, and corresponding monitoring channel before removing the existing assembly.
- Inspect the assembly — Check the transducer housing, mounting surfaces, accessible connections, and associated hardware for damage, contamination, or signs of mechanical disturbance.
- Remove the existing assembly carefully — Avoid disturbing the machine reference arrangement or damaging the connected signal wiring during removal.
- Inspect the mounting and reference surfaces — Verify that the mounting point and reference structure remain secure and suitable for the intended measurement arrangement.
- Install the replacement assembly — Position the 24765-02-01 according to the applicable machine and installation documentation, maintaining the required mechanical relationship to the reference point.
- Reconnect the signal wiring — Confirm that the associated cable and electrical connections are correctly identified, securely connected, and protected from unnecessary mechanical stress.
- Verify the reference relationship — Check the installed position against the applicable installation procedure before returning the measurement channel to service.
- Perform a controlled monitoring check — Restore the measurement system and confirm that the channel responds as expected while observing for abnormal readings, signal instability, or unexpected alarms.
- Record the maintenance work — Document the installed model, measurement location, wiring status, reference arrangement, test results, and any relevant observations for future machinery maintenance.
Related Components
| Component | Function in the System |
|---|---|
| Bently Nevada Machinery Monitoring System | Receives and evaluates machinery measurement information |
| Case Expansion Transducer Cable | Transfers the transducer signal to associated monitoring electronics |
| Machinery Monitoring Module | Processes applicable transducer measurement information |
| Machine Case / Reference Structure | Provides the mechanical relationship required for case movement measurement |
| Rotating Equipment | Generates the casing movement being monitored |
| Machinery Protection System | Uses configured measurements for machinery protection functions |
| Monitoring Cabinet | Houses associated monitoring and signal-processing hardware |
| Machinery Condition Monitoring System | Supports measurement trending and maintenance analysis |
Recommended Related Models
| Model / Product Family | Product Type | Typical Relationship |
|---|---|---|
| Bently Nevada 24765 Series | Case Expansion Transducer Assembly | Related case expansion measurement family |
| Bently Nevada Case Expansion Transducers | Displacement Measurement Hardware | Related measurement hardware |
| Bently Nevada Proximity Measurement Systems | Machinery Measurement System | Related non-contact displacement monitoring technology |
| Bently Nevada Machinery Monitoring Modules | Monitoring Hardware | Associated signal-processing and monitoring equipment |
| Bently Nevada Machinery Protection Systems | Machinery Protection Hardware | Higher-level system used with machinery measurements |
Key Advantages
- Provides dedicated measurement of machine case movement.
- Supports monitoring of thermal and operating-condition-related casing movement.
- Integrates into broader Bently Nevada machinery monitoring architectures.
- Provides a defined measurement point between the machine case and reference structure.
- Useful for rotating machinery condition monitoring and maintenance analysis.
- Suitable for established machinery monitoring installations requiring transducer replacement.
Technical FAQs
What does the Bently Nevada 24765-02-01 measure?
The 24765-02-01 is used for case expansion measurement, monitoring relative movement of a machine casing with respect to an established reference arrangement.
Why is case expansion monitored on large rotating equipment?
Large machines can experience casing movement as temperatures, operating loads, and thermal conditions change. Monitoring this movement provides additional information for evaluating machine behavior during startup, operation, load transitions, and shutdown.
Does the 24765-02-01 perform the complete machinery protection function?
No. The transducer assembly is one part of the measurement chain. Signal wiring, monitoring electronics, configured monitoring channels, and the broader machinery protection or condition monitoring system perform the associated signal processing, monitoring, alarming, and protection functions.
What should be checked when replacing a 24765-02-01?
The replacement should be checked against the existing monitoring configuration, mechanical mounting arrangement, reference location, signal wiring, and monitoring channel. After installation, the physical reference relationship and the resulting measurement should be verified through a controlled test.