The Bently Nevada 31000-28-05-00-024-01-02, also cataloged as the 31000 Series Proximity Probe Housing, operates as a dedicated mechanical hardware component for secure transducer mounting and environmental isolation within rotating machinery turbine monitoring (TSI) platforms.

Suffix Breakdown & Model Matrix

The 31000-28-05-00-024-01-02 adheres to the standard Bently Nevada probe housing configuration nomenclature:

• 31000: Proximity probe housing series.

• 28: Probe diameter (8 mm).

• 05: Mounting thread specification (e.g., 3/4-14 NPT).

• 00: Extension piece configuration.

• 024: Overall housing length (240 mm).

• 01: Conduit fitting type.

• 02: Material and coating option.

Hardware Specifications

Mechanical Mounting and Structural Integrity

This housing assembly serves as the rigid interface for proximity probe installation, ensuring the sensor remains decoupled from extraneous structural vibrations. By providing a fixed mechanical path, the housing maintains the precise gap required for accurate eddy-current displacement measurement. The assembly acts as an environmental barrier, protecting the probe body and its coaxial cable from oil mist, particulates, and mechanical impacts prevalent in turbomachinery environments. The internal thread design supports accurate probe depth adjustment, allowing the user to precisely set the gap relative to the machine shaft.

Ordering info

• One (1) 31000-28-05-00-024-01-02 Proximity Probe Housing.

• Mounting nut and O-ring seal kit.

• Technical installation and assembly documentation.

• Note: Ensure thread compatibility with existing machine ports for pressure-tight installation.

Field Installation Guidelines

• Mechanical Interface: Install the housing into the machine port using appropriate thread sealant (e.g., Teflon tape or industrial pipe compound) to achieve a positive, leak-free seal.

• Alignment: Ensure the housing is oriented perpendicular to the shaft centerline; verify that the probe can be fully inserted and adjusted to the required operating gap.

• Cable Routing: Use the integrated conduit fitting to secure the probe's coaxial cable; maintain a gentle bend radius to avoid damaging the internal coaxial dielectric or shield.

• Grounding: Secure the housing body to a clean, low-impedance machine ground to maintain the shielding integrity of the transducer system.

• Locking: Once the optimal probe gap is established, tighten the jam nuts to secure the housing assembly, preventing movement due to harmonic vibration.

Frequently Asked Questions

• What is the purpose of the 31000 series housing?

  The 31000 series provides a robust, standardized mechanical interface for mounting proximity probes while protecting the probe body and cable from the machine operating environment.

• Is the housing compatible with all 8 mm probes?

  The housing is designed specifically for 8 mm probe diameters; verify that the probe thread pitch matches the internal threading of the housing.

• How is the thread seal maintained?

  The housing utilizes standard NPT threads; apply suitable industrial thread sealant to ensure a pressure-tight seal if the installation is in a pressurized oil cavity.

• Can the housing be used in high-temperature zones?

  Yes. The housing is rated for temperatures up to +177 deg C; ensure the selected thread sealant is also rated for the operating temperature of the machine.

• How is mechanical resonance avoided during installation?

  Proper installation involves threading the housing deeply into the machine casing to minimize "stick-out," reducing the lever arm effect that causes vibration-induced noise.

• Is the housing material resistant to chemical exposure?

  The stainless steel construction provides high resistance to oxidation and chemical degradation typically encountered in turbine lubrication systems.

• How do I confirm the housing length is correct for my application?

  The 240 mm length is measured from the mounting flange to the conduit fitting; ensure this fits within the physical space constraints of your machine casing.

• What should be done if the conduit fitting is damaged?

  The conduit fitting is integral to the housing assembly; if damaged, the integrity of the cable shielding may be compromised, necessitating an assembly replacement.