High Temperature Dual Transducer Case Expansion Transducer with Weatherproof LVDT Assembly for Thermal Growth Measurement
Price:
1600
MOQ:
1
Delivery Time:
12-16weeks
Brand:
BENTLY NEVADA
Product Description
135613-13 135613-01 24765 and 135613 Case Expansion Transducer Systems - Bently Nevada Machinery Condition Monitoring
Thermal Case Growth Measurement for Large Turbines
Case expansion (also known as shell expansion) is a critical position measurement in Turbine Supervisory Instrumentation (TSI). This parameter tracks the thermal growth of the machine casing as it expands during startup and online operations. The transducer system is typically mounted on the foundation opposite the turbine casing attachment point, providing precise measurement of machine case growth relative to the foundation.
Dual Transducer Configuration Benefits
- Dual transducer arrangement provides comprehensive monitoring of sliding feet positions on the machine case
- Detects potential foot obstruction or jamming conditions that could distort the case and cause machine damage
- Integrated with 3300 or 3500 monitors to provide immediate alarm notification for abnormal conditions
- High temperature dual case expansion configuration is exclusively compatible with the 3500/45 Position Monitor
Operational Advantages
Case expansion measurements enable operators to determine if machine conditions exceed expected temperature growth differentials. This is particularly important during startup to ensure the machine casing and rotor grow thermally at nearly identical rates. Different thermal growth rates between rotating and stationary components can lead to dangerous rubbing conditions.
System Design
The case expansion transducer assembly incorporates a linear variable differential transformer (LVDT) housed within a robust, weatherproof protective enclosure for reliable operation in industrial environments.
24765 DC LVDT Assembly Specifications
| Parameter | Specification |
|---|---|
| Input Power | +24 Vdc, 30 mA minimum |
| Scale Factor | 24765-01: 0.346 V/mm (8.79 V/in) 24765-02: 0.404 V/mm (10.25 V/in) 24765-03: 0.143 V/mm (3.63 V/in) |
| Linear Range | 24765-01: ±12.7 mm (±0.5 in) 24765-02: ±25.4 mm (±1.00 in) 24765-03: ±51 mm (±2.00 in) |
| -3 dB Frequency | 24765-01: 20 Hz 24765-02: 15 Hz 24765-03: 10 Hz |
| Output Impedance | 7 kΩ nominal, all models |
| Minimum Load Resistance | 24765-01: 50 kΩ 24765-02: 100 kΩ 24765-03: 200 kΩ |
135613 DC LVDT High Temperature Case Expansion Transducer System
| Parameter | Specification |
|---|---|
| Input Power | +13.5 to +26 Vdc unregulated, 30 mA minimum |
| Voltage Output | +1 to +6 Vdc, all models |
| Output Noise | <10 mV |
| Scale Factor | 135613-01/-11: 0.20 V/mm (5.0 V/in) 135613-02/-12: 0.10 V/mm (2.5 V/in) 135613-03/-13: 0.049 V/mm (1.25 V/in) |
| Linear Range | 135613-01/-11: 25.4 mm (1.00 in) 135613-02/-12: 50.8 mm (2.00 in) 135613-03/-13: 101.6 mm (4.00 in) |
| -3 dB Frequency | 200 Hz typical, all models |
| Stability | 0.125% full-scale |
| Non-Linearity | Less than 0.25% full-scale |
| Temperature Coefficient | 0.05%/°C (0.028%/°F) maximum |
135613 DC LVDT Dimensions
| Dimension | Specification |
|---|---|
| Body Length | 135613-01/-11: 171 mm (6.75 in) 135613-02/-12: 209 mm (8.24 in) 135613-03/-13: 297.4 mm (11.71 in) |
| Body Diameter | 19.2 mm (0.75 in), all models |
| Body End to Null Center | 135613-01/-11: 65.4 mm (2.57 in) 135613-02/-12: 84.3 mm (3.32 in) 135613-03/-13: 129 mm (5.07 in) |
| Core Length | 135613-01/-11: 87.6 mm (3.45 in) 135613-02/-12: 87.6 mm (3.45 in) 135613-03/-13: 135 mm (5.30 in) |
| Core Diameter | 4.8 mm (0.19 in), all models |
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Company
GREAT SYSTEM INDUSTRY CO. LTD
Location
Flat 10, 6/F, Block A, Hi-Tech Ind. Ctr. 5-21 Pak Tin Par St, Tsuen Wan, HK
Contact Person
Jim