Configured for the mechanical containment and environmental protection of displacement transducers in rotating machinery, the Bently Nevada 31000-28-05-15-026-06-02 (31000-28-05-15-026-06-02 Proximity Probe Housing Assembly) provides direct physical mounting and alignment for eddy-current probes within turbine monitoring (TSI) platforms.

Model Matrix and Configuration Breakdown

The 31000 series housing assembly is a modular system designed for specific mechanical interface requirements:

• 31000: Base housing assembly series.

• 28: Probe diameter/thread specification.

• 05: Mounting interface configuration.

• 15: Housing length or extension code.

• 026: Thread type and lead length designation.

• 06: Material composition code.

• 02: Accessory/Fitting option.

Hardware Specifications

Mechanical Monitoring and Probe Integration

The housing assembly is engineered to facilitate precise probe positioning, which is critical for maintaining consistent eddy-current probe scaling. By providing a rigid mechanical interface, the assembly aids in gap voltage validation, ensuring the probe remains centered within its linear operating range of -10 VDC. The assembly architecture minimizes mechanical resonance, which contributes to effective cross-talk suppression between redundant sensor installations. This rigid mounting is necessary for accurate rotor dynamics monitoring, allowing for the reliable detection of shaft centerline position and radial vibration in high-velocity turbomachinery.

Ordering info

• One (1) 31000-28-05-15-026-06-02 Proximity Probe Housing Assembly.

• Mounting hardware kit (nuts, jam nuts, and washers).

• O-ring seals for environmental ingress protection.

• Installation and technical integration documentation.

Field Installation Guidelines

• Alignment: Ensure the housing is mounted perpendicular to the target shaft surface to prevent measurement bias.

• Torque Management: Use a calibrated torque wrench for the jam nuts; do not exceed the mechanical stress limits of the housing threads to prevent binding.

• Seal Integrity: Verify that all O-rings and thread seals are correctly seated to prevent leakage in pressurized or fluid-exposed environments.

• Vibration Dampening: If the machine environment is prone to extreme harmonic oscillation, ensure the housing is secured with redundant locking mechanisms or vibration-proof washers.

• Maintenance Access: Provide sufficient clearance around the assembly to allow for probe adjustment or removal without requiring disassembly of the machine case.

Frequently Asked Questions

• Why is the housing constructed from stainless steel?

  Stainless steel provides the mechanical rigidity and corrosion resistance required for long-term deployment in industrial oil and gas or power generation environments.

• Can this housing be used for all 3300 series probes?

  No. The housing thread specification must match the specific probe diameter and thread pitch; verify the 31000 series compatibility chart before assembly.

• Does the housing affect the transducer calibration?

  The housing itself is passive, but improper installation (such as misalignment or lack of grounding) can introduce electrical interference in the transducer signal.

• How is the probe held in place within the housing?

  The assembly utilizes a series of locknuts that secure the probe body at the desired insertion depth, ensuring the gap remains stable during operation.

• Can I replace the O-rings without removing the housing?

  In most configurations, O-rings are accessible only when the probe is retracted, though external seals may be replaced if the housing remains fixed.

• What is the purpose of the 15 code in the part number?

  The code represents specific mechanical dimensions of the housing, ensuring the probe tip reaches the optimal distance from the target shaft.

• How do I prevent galling on the housing threads?

  Apply a thin layer of industrial-grade, compatible thread lubricant if recommended for the specific application environment to ensure ease of adjustment.

• Is this housing assembly rated for explosion-proof zones?

  The housing material and design are suitable for many hazardous areas, but the assembly must be installed in accordance with local safety codes and probe agency approvals.