Bently Nevada 991-06-50-01-CN Thrust Transmitter | Axial Position Monitoring | 3500 Series Platform
Engineering Background
The Bently Nevada 991-06-50-01-CN is a precision thrust (axial position) transmitter engineered for the 3500 Series machinery protection platform. Designed to work in conjunction with 3300 XL 8mm proximity probe systems, this transmitter converts raw eddy-current gap signals into industry-standard 4–20 mA outputs, enabling real-time axial displacement monitoring on critical rotating equipment including steam turbines, gas turbines, compressors, and pumps.
Product Positioning
As a core component of Bently Nevada’s 3500 Series rack-based protection system, the 991-06-50-01-CN is the preferred choice for OEM integrators and plant engineers who require certified, traceable, and drop-in-compatible thrust monitoring hardware. Konmask.com supplies this module with full traceability documentation, making it suitable for both greenfield installations and MRO replacement programs.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 991-06-50-01-CN |
| Brand / OEM | Bently Nevada (Baker Hughes) |
| Platform | 3500 Series Machinery Protection System |
| Module Function | Thrust / Axial Position Transmitter |
| Compatible Probe | 3300 XL 8mm Proximity Probe System |
| Output Signal | 4–20 mA (standard) |
| Measurement Range | Axial displacement per probe system calibration |
| Power Supply | 24 VDC (from 3500 rack backplane) |
| Communication | Rack-integrated (3500 Series backplane bus) |
| Enclosure / Form Factor | 3500 Series plug-in module card |
| Operating Temperature | 0°C to +65°C (module); probe per probe spec |
| Approvals / Certifications | CE, SIL-capable (per system configuration) |
| Weight | 440 g (approx.) |
| Country of Origin | USA (Bently Nevada OEM) |
| Konmask SKU | 991-06-50-01-CN |
Proven Application Environments
- Steam & Gas Turbines – Continuous axial shaft position monitoring to detect thrust bearing wear and rotor migration
- Centrifugal Compressors – Real-time thrust load measurement for surge and overload protection
- Boiler Feed Pumps – Axial displacement trending for predictive maintenance scheduling
- Gearboxes & Expanders – Integration with 3500 rack for multi-channel protection schemes
- LNG & Petrochemical Plants – SIL-rated protection loops requiring certified transmitter modules
- Power Generation – OEM-specified replacement in GE, Siemens, and Mitsubishi turbine trains
Engineering Advantages
- OEM Compatibility – Direct plug-in replacement for existing 3500 Series racks; no reconfiguration required
- High Signal Integrity – Eddy-current proximity technology immune to oil contamination and mechanical contact
- 4–20 mA Output – Universal analog output compatible with DCS, SCADA, and safety PLC inputs
- Rack-Level Diagnostics – Integrates with 3500 rack’s built-in self-test and OK relay functions
- Long Service Life – Solid-state design with no moving parts; rated for continuous industrial duty
- Traceable Supply Chain – Konmask sources from verified OEM channels with full documentation
System Architecture & Signal Flow
The 991-06-50-01-CN operates within the Bently Nevada 3500 rack architecture as follows:
- Proximity Probe (3300 XL 8mm) → detects rotor axial gap via eddy-current effect
- Extension Cable → transmits raw oscillator signal to the rack-mounted transmitter
- 991-06-50-01-CN Transmitter Module → conditions signal, applies calibration, outputs 4–20 mA
- 3500 Monitor Card → receives 4–20 mA, applies alarm setpoints, drives relay outputs
- DCS / Safety PLC → receives analog and discrete signals for plant-level protection and trending
This architecture ensures full galvanic isolation between field instrumentation and control system, meeting IEC 61511 functional safety requirements when configured appropriately.
Sourcing & Quality Verification
Konmask.com maintains a rigorous supplier qualification process for all Bently Nevada components:
- All units supplied with original OEM packaging and part number labels
- Batch traceability records available upon request (lot number, date code)
- Pre-shipment functional verification against Bently Nevada calibration standards
- Certificate of Conformance (CoC) available for regulated industries
- Export compliance documentation for cross-border procurement
Procurement Process
- Confirm Part Number – Verify 991-06-50-01-CN matches your 3500 rack slot and probe system configuration
- Request Quote – Contact support@konmask.com with quantity, delivery timeline, and any certification requirements
- Order Confirmation – Receive proforma invoice with lead time and shipping options (DHL / FedEx / sea freight)
- Quality Documentation – CoC, packing list, and export declaration issued with every shipment
- After-Sales Support – Technical assistance available for installation, commissioning, and calibration queries
Technical FAQ
Q: Is the 991-06-50-01-CN compatible with all 3500 Series racks?
A: Yes. It is designed as a standard plug-in module for the 3500 rack platform. Confirm slot type and firmware version with your system integrator for SIL-rated applications.
Q: Can this transmitter be used with probes other than the 3300 XL 8mm?
A: The module is calibrated for the 3300 XL 8mm probe system. Using alternative probes requires recalibration and is not recommended without Bently Nevada engineering approval.
Q: What is the typical lead time from Konmask?
A: Standard stock items ship within 3–5 business days. For urgent requirements, contact us directly for expedited options.
Q: Do you provide installation and commissioning support?
A: Yes. Our technical team can provide remote guidance for installation, loop calibration, and integration with your DCS or safety PLC.
Q: Is a Certificate of Conformance available?
A: Yes. CoC is issued with every shipment upon request. Additional third-party inspection can be arranged for regulated industries.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
