Product Overview

The 31000-28-05-00-037-03-02 is a precision-engineered external mounting solution designed by Bently Nevada to facilitate the installation of proximity transducers through machine casings. This housing assembly is a critical component for Turbine Supervisory Instrumentation (TSI), allowing sensors to monitor shaft behavior without requiring the machine to be opened. Its primary advantage is "external adjustability," which permits technicians to calibrate the probe gap or replace the transducer entirely from the outside of the machine, significantly lowering maintenance costs and reducing operational downtime.

Hardware Configuration and Technical Parameters

This specific 31000 series configuration is built to withstand aggressive industrial environments while maintaining signal accuracy. The assembly utilizes high-performance materials to ensure long-term structural integrity and corrosion resistance.

• Model Number: 31000-28-05-00-037-03-02

• Probe Type: Supports 3300 XL 8mm proximity probes

• Housing Material: High-strength Polyphenylene Sulfide (PPS) and Stainless Steel

• Standard Compliance: Fully meets API 670 requirements for externally mounted housings

• Probe Option: Integrated 3300 XL 8mm probe included (based on -28 option)

• Standoff Distance: 3.7 inches (approx. 94 mm) total length (based on -037 option)

• Fittings: 3/4-14 NPT conduit thread (based on -02 option)

• Environmental Rating: Suitable for Type 4X and IP66 installations when properly sealed

• Hazardous Area Compatibility: Approved for use in intrinsically safe (IS) zones with appropriate barriers

Industrial Applications and Operational Benefits

The 31000-28-05-00-037-03-02 is predominantly utilized on large-scale rotating assets such as steam turbines, centrifugal compressors, and industrial gearboxes. It is the preferred mounting method for:

• Radial Vibration Monitoring: Capturing the relative movement of the shaft within the bearing.

• Keyphasor Measurements: Providing once-per-turn timing signals for phase analysis and speed detection.

• Axial Position (Thrust): Tracking the longitudinal movement of the rotor.

By utilizing this housing, plants can perform "hot" maintenance on their sensors. If a probe fails or requires re-gapping, the work can be performed while the machine remains on-line or during a short window, as there is no need to remove the machine's top half-casing. This makes it an indispensable tool for predictive maintenance programs in power generation, oil and gas, and petrochemical facilities.