Product Description
The Bently Nevada 135613-01-00 is a High Temperature Case Expansion Transducer Assembly, specifically designed to monitor the axial position or differential expansion of large rotating machinery, particularly steam turbines, in demanding high-temperature environments. This specialized proximity transducer system, often part of the Bently Nevada 3300 XL 50 mm or similar series, provides an output voltage directly proportional to the distance between the probe tip and the observed conductive surface (e.g., turbine casing or rotor). The Bently Nevada 135613-01-00 is engineered to withstand the challenging conditions of steam turbine environments, ensuring reliable and accurate measurements for machinery protection and condition monitoring. Its high-temperature capabilities and robust construction make the Bently Nevada 135613-01-00 an essential component for safeguarding critical assets and optimizing operational efficiency. The Bently Nevada 135613-01-00 helps detect abnormal expansion or contraction, which can lead to costly damage if not monitored.
Product Parameters
The Bently Nevada 135613-01-00 High Temperature Case Expansion Transducer Assembly features specific technical parameters for its specialized application:
| Parameter | Specification |
|---|---|
| Transducer Type | Proximity Transducer / LVDT (Linear Variable Differential Transformer) for Case Expansion |
| Probe Diameter | Typically 50 mm (depending on specific assembly variations) |
| Linear Range | Typically up to 27.9 mm (1100 mils) for 50 mm systems, representing a very long linear range for eddy current transducers. |
| Average Scale Factor (ASF) | Typically 394 mV/mm (10 mV/mil) nominal (for associated Proximitor Sensor) |
| Operating Temperature (Probe) | Up to 200°C (392°F) continuous; can withstand intermittent high temperatures up to 250°C (482°F) |
| Operating Temperature (Proximitor Sensor & Cable) | Typically 0°C to +65°C (+32°F to +149°F) or -35°C to +120°C (-31°F to +248°F) for system performance over extended temperatures. |
| Power Requirement | Typically -17.5 Vdc to -26 Vdc (for associated Proximitor Sensor) |
| Output Resistance | Typically 50 Ω (for associated Proximitor Sensor) |
| Cable Type | High-temperature fluid-loc cable (standard on 50 mm probes) |
| Connector Type | Special high-temperature ClickLoc connectors |
| Probe Tip Material | Polyphenylene Sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel (SST) |
| Recommended Minimum Target Size | 102 mm (4.0 in) diameter (flat target) for 50 mm systems |
Advantages and Features
The Bently Nevada 135613-01-00 offers several key advantages and features tailored for critical machinery monitoring:
- Exceptional High-Temperature Performance: The primary advantage of the Bently Nevada 135613-01-00 is its ability to operate continuously and accurately in extreme high-temperature environments, specifically up to 200°C (392°F), with intermittent tolerance up to 250°C (482°F). This is crucial for applications like steam turbines where casing expansion is a vital measurement.
- Long Linear Measurement Range: The Bently Nevada 135613-01-00, often associated with 50 mm proximity transducer systems, provides a significantly long linear measurement range (e.g., 27.9 mm or 1100 mils). This extended range is ideal for accurately capturing the large movements associated with differential expansion in large turbines.
- Robust and Durable Construction: Designed to survive the harshest industrial conditions, the Bently Nevada 135613-01-00 features a durable probe tip and case materials (PPS and AISI 304 SST) and special high-temperature cabling and connectors (FluidLoc and ClickLoc). This ensures longevity and consistent performance in aggressive environments.
- Accurate and Reliable Data: The system provides a highly accurate and repeatable voltage output proportional to displacement, enabling precise monitoring of case expansion or differential expansion. This data is critical for preventing thermal-induced stress and potential damage to machinery.
- API 670 Compliance: The Bently Nevada 135613-01-00 assembly and its associated Proximitor Sensor systems (like the 3300 XL 50 mm) are designed to fully comply with API 670 standards, which is the world’s most widely used specification for machinery protection systems. This ensures high reliability and performance for critical applications.
Application Areas and Application Cases
The Bently Nevada 135613-01-00 High Temperature Case Expansion Transducer Assembly is specifically utilized in industries with large rotating machinery operating under significant thermal variations.
- Power Generation (Steam Turbines): This is the primary application area for the Bently Nevada 135613-01-00. It is essential for monitoring the differential expansion (DE) or rotor expansion (RX) of large steam turbine generators. This measurement assesses the difference in growth rates between the turbine rotor and the machine stator (casing) as temperatures change during startup, shutdown, and load changes.
- Oil and Gas Industry: Used in applications involving large turbines or compressors where high temperatures and thermal growth are significant factors affecting machine integrity.
- Heavy Manufacturing: Any industrial setting utilizing large, high-temperature rotating equipment where precise measurement of thermal expansion is critical for operational safety and maintenance.
Application Case: In a large coal-fired power plant, Bently Nevada 135613-01-00 transducer assemblies were installed on the high-pressure and intermediate-pressure sections of a critical steam turbine to monitor its case expansion during startup and shutdown cycles. Due to the high steam temperatures, standard proximity probes were insufficient. The Bently Nevada 135613-01-00‘s ability to withstand continuous temperatures up to 200°C was crucial. The data from the Bently Nevada 135613-01-00 transducers was fed into the plant’s Bently Nevada 3500 Machinery Protection System. This allowed operators to closely monitor the relative thermal movement between the rotor and casing, ensuring that critical clearances were maintained and preventing rubbing or contact. By observing the expansion trends provided by the Bently Nevada 135613-01-00, the plant was able to optimize their startup procedures, reducing thermal stress on components and significantly extending the lifespan of the turbine, while also preventing costly unplanned outages due to thermal-induced damage.
Competitive Comparison
When compared to other general-purpose displacement sensors or high-temperature sensors in the market, the Bently Nevada 135613-01-00 distinguishes itself through its specialized design and integration. While other LVDTs or inductive sensors might offer high-temperature ratings, the Bently Nevada 135613-01-00 is specifically engineered as a complete transducer assembly for the unique requirements of machinery case expansion, often paired with the Bently Nevada 3300 XL Proximitor Sensor series to form a certified system. This integrated system approach ensures precise linearity over very long ranges and robust performance in environments prone to steam, oil, and high temperatures, where other sensors might quickly degrade or lose accuracy. Its compliance with API 670 standards for machinery protection is a significant differentiator, as not all high-temperature sensors meet such stringent industry specifications for critical asset monitoring. The Bently Nevada 135613-01-00 provides a proven, highly reliable solution specifically tailored for turbine applications, offering superior long-term stability and compatibility within the comprehensive Bently Nevada monitoring ecosystem compared to generic offerings.
