Description
Unboxing & Physical Snapshot
- Brand & Model: Bently Nevada 24765-02-01, DC Case Expansion Transducer Assembly (LVDT)
- Physical Dimensions: 241 mm × 117 mm × 88.9 mm (9.50 × 4.60 × 3.50 in)
- Estimated Shipping Weight: 2.3 kg (packaged with anti-static foam inside rigid export carton)
- What’s in the Box: 24765-02-01 LVDT transducer assembly, stainless steel enclosure, spring return probe assembly, mounting hardware, factory serial test certificate; monitoring rack module, extension cable sold separately.
Product Introduction (Structure A: Environmental hook)
Bently Nevada 24765-02-01 is a DC-powered LVDT casing expansion transducer assembly, widely installed on large steam turbines in power plants. It is engineered to withstand continuous mechanical vibration, thermal cycling, EMI interference and wide temperature fluctuations that degrade ordinary linear displacement sensors. This LVDT transducer precisely measures turbine casing thermal expansion displacement during unit startup, load variation and shutdown. The 02 suffix represents 50.8 mm (2.0 inch) linear range, and 01 denotes built-in spring return probe. It converts mechanical casing movement into proportional DC analog signal and feeds data to Bently Nevada 3500/33 machinery monitoring system for casing expansion protection and trending. Onboard high linearity signal conversion ensures accurate thermal growth measurement. Displacement linearity, repeatability and long-term stability are mandatory audit points for turbine machinery safety reviews. The rugged sealed metal housing protects internal LVDT winding from dust, moisture and turbine bay ambient contaminants.
Core Technical Specifications
| Parameter | Value |
|---|---|
| Platform | Bently Nevada 3500 Machinery Protection System |
| Part Number | 24765-02-01 |
| Product Type | DC Casing Expansion LVDT Transducer Assembly |
| Linear Measuring Range | 50.8 mm (2.0 inch) |
| Scale Factor | 0.404 V/mm (10.25 V/in) |
| Linearity | ±0.5% Full Scale |
| Repeatability | ≤ ±0.01% FS |
| Probe Style | Spring return (suffix 01) |
| Supply | 24 VDC |
| Operating Ambient Temp | -18 °C ~ +77 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Relative Humidity (operating) | 5% ~ 95%, non-condensing |
| Construction | Sealed stainless steel enclosure, LVDT linear variable differential transformer |
Global Compliance & Industry Certifications
- CE Mark
- UL/cUL Listed
- API 670 Machinery Protection Standard
- ISA-S71.04 G3 environmental contaminant rating
- RoHS compliant for applicable batches
UL / API 670 certification verifies measurement accuracy, vibration resistance and thermal ratings for continuous turbine compartment operation. Serial-number specific certificates should be validated per individual unit.
Long-Term Storage & Asset Preservation Guide
Store the 24765-02-01 transducer assembly sealed inside original ESD shielding bag and reinforced shipping crate in a dry, temperature-stable warehouse. Electrostatic discharge can damage internal LVDT windings and signal conditioning circuits, causing sensitivity drift, signal offset or loss of displacement measurement after field installation. Inspect spare units every 24 months. For assemblies stored more than three years, perform bench linearity calibration test before commissioning; spring fatigue and winding aging may degrade measurement performance. Do not stack heavy hardware on the transducer enclosure. Mechanical impact can bend the spring probe rod, damage internal LVDT coil and lead to displacement reading errors.
Physical Installation Prerequisites
Prepare rigid fixed reference mounting bracket on turbine foundation and contact point on turbine casing. Loose mounting will introduce false displacement readings. Mount 24765-02-01 assembly firmly, preload spring return probe correctly per OEM installation procedure. Separate LVDT signal cable from high-voltage power wiring to minimize EMI interference. Bond transducer enclosure and turbine rack chassis to protective earth. Complete loop calibration, full-range stroke test and channel configuration on the 3500 monitor after physical installation.
Buyer’s FAQ
Q: What HS tariff code applies to Bently Nevada 24765-02-01 for cross-border shipments? A: Primary HS classification falls under 8543 for industrial displacement transducers. Confirm classification with your customs broker before export filings, as rulings depend on supporting technical documentation.
Q: What country of origin is marked on Bently Nevada 24765-02-01? A: Country of Origin is United States. This marking appears on the unit nameplate and must be reproduced on commercial invoices for cross-border compliance audits.
Q: What does 02 and 01 in 24765-02-01 stand for? A: 02 = 50.8 mm (2 inch) linear travel range; 01 = spring return probe variant. Different suffix combinations cannot be swapped directly.
Q: Should I purchase all-risk shipping insurance for this spare Bently Nevada casing expansion transducer? A: Yes. Transit shock can bend the probe rod or damage delicate LVDT coils. Hidden mechanical faults may only manifest after field mounting and calibration. All-risk insurance covers full replacement value for transit handling defects.
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