Product Overview

The Bently Nevada 31000-16-10-00-153-00-02 is a heavy-duty, explosion-proof proximity probe housing assembly designed to provide advanced mechanical shielding and environmental protection for proximity probes. In critical turbomachinery environments, monitoring components are constantly exposed to hostile factors such as high-pressure washdowns, corrosive gases, steam leaks, and physical impacts. This housing assembly eliminates these hazards, allowing internal sensors to carry out continuous, non-contact gap and vibration measurements without external disruption.

Engineered with a focus on internal probe adjustments during machine operation, this housing assembly enables external access for adjusting probe depth. Technicians can calibrate or replace internal sensors without tearing down or breaking seals on main machine bearing caps. This capability minimizes maintenance risks and eliminates costly machine downtime during routine calibration checks. The 31000 series is constructed of anodized aluminum or optional stainless steel, ensuring comprehensive corrosion protection for critical applications across power generation, petrochemical processing, and maritime industries.

Technical Specifications

Model Configuration Explanation

The product code 31000-16-10-00-153-00-02 breaks down into specific material selections, thread settings, and dimensional tolerances:

• 31000: Base part number for the standard Bently Nevada Explosion-Proof Proximity Probe Housing Assembly.
• 16: Probe Thread Option. Designates 3/8-24 UNF threads for standard 8 mm or equivalent sized proximity probe integration.
• 10: Conduit Fitting Option. Selects a 3/4-14 NPT fitting structure, accommodating standard rigid industrial piping interfaces.
• 00: Explosion-Proof Thread Option. Selects a 3/4-14 NPT thread entry for immediate containment and protection within hazardous zones.
• 153: Sleeve Length Option. Specifies an overall insertion sleeve length of 15.3 inches (equivalent to 389 mm) to deep-mount probes past heavy insulation blankets.
• 00: O-Ring Sealing Option. Configured with a durable, industry-standard fluorocarbon (Viton) elastomer seal system for robust resistance against hot synthetic lubricants.
• 02: Material and Certification Option. Specifies an anodized aluminum structure certified under standard North American (FM/CSA) and international explosion-proof frameworks.

Typical Applications

• Steam and Gas Turbine Housings: Protecting thrust and radial vibration probes positioned through external structural exhaust hoods.
• Large Centrifugal Compressors: Guarding proximity sensors operating on main high-pressure gas processing lines from environmental leaks.
• Induced Draft Fans: Securing speed monitoring sensors and keyphasors exposed to ambient particulate deposits and fluctuating outdoor climates.
• Hydroelectric Generating Sets: Managing water splash risks around guide bearing assemblies where moisture ingress ruins electrical connections.
• Petrochemical Agitators: Shielding proximity probes tracking long-shaft deflections within aggressive chemical processing environments.

System Compatibility

The 31000-16-10-00-153-00-02 operates as an external protection framework. It offers direct structural compatibility across standard vibration equipment lines:

• Proximity Probes: Fully matches the 3/8-24 UNF threads found on Bently Nevada 3300 XL 8 mm probes (330101 series) and historical 7200 series 8 mm variants.
• Conduit Infrastructure: Integrates into heavy-wall rigid galvanized steel conduit grids or flexible liquid-tight metallic conduits via standard 3/4 NPT thread entries.
• Diagnostic Racks: Accommodates sensor wiring routed through to field junction boxes, moving downstream into the Bently Nevada 3500 Machinery Protection System or Orbit 60 monitoring architectures.

Mechanical Installation Steps

• Before installing, check that the internal probe sleeve moves smoothly without binding against the outer housing barrel.
• Apply a certified, non-hardening thread sealant to all external 3/4 NPT conduit connections to maintain the enclosure's NEMA 4X / IP66 water-tight integrity.
• Insert the assembly into the bearing block counter-bore, making sure the Viton face seals seat evenly without twisting or pinching.
• Tighten the primary mounting threads to structural specifications while keeping the outer housing box oriented for straightforward internal probe adjustment.
• Thread the proximity probe into the internal sleeve until the probe tip lightly touches the target shaft face, then back it off to the required calibration distance.
• Lock the internal sleeve locking collar securely using the provided hex configuration to prevent vibration from shifting the probe's set point.

Product Advantages

• External Probe Adjustment: Allows technicians to make full mechanical position adjustments and changes safely while the machine is running.
• Robust Hazardous Zone Protection: Fully certified housing provides reliable containment against explosive gas ignition in Class I, Division 1 areas.
• IP66 Moisture and Dust Shielding: Keeps water washdowns, ambient moisture, and flying particulate waste away from sensitive sensor connections.
• Viton Elastomer Seal Security: Withstands direct contact with hot hydrocarbon compounds and synthetic turbine oils without weeping or breakdown.
• Reduced Maintenance Overhead: Simplifies routine calibration cycles, lowering labor costs and protecting internal sensors from physical damage during plant maintenance overhauls.

Ordering Information

Logistics and Shipping

To protect the precision threads and long internal sleeve of the 31000 housing, each unit is packed within protective anti-static industrial packaging. This specialized containment isolates the assembly from mechanical shocks and prevents scratching or impact damage to the critical internal sealing surfaces.

Housings are packed into reinforced cardboard boxes with custom high-density foam supports that secure the extension sleeve from bending during transit. Shipments are handled globally via major industrial logistics networks, including DHL, FedEx, and UPS, with full export documentation and accurate customs codes provided for customs clearance.

Frequently Asked Questions

• What is the main benefit of using the 31000 proximity probe housing assembly?

  The assembly lets maintenance teams adjust or replace proximity probes externally without shutting down the machine or dismantling the bearing housing.

• What does the "153" number represent in the model code?

  The "153" designation indicates that this model features an overall internal sleeve and case length option of 15.3 inches.

• Is this probe housing assembly certified for explosive environments?

  Yes, the "02" designation provides full explosion-proof ratings for Class I (Groups A, B, C, D) and Class II (Groups E, F, G) hazardous locations.

• Can this housing accommodate standard Bently Nevada 3300 XL 8 mm probes?

  Yes, the "16" thread option specifies a 3/8-24 UNF internal thread, which perfectly matches standard 3300 XL 8 mm proximity probes.

• What type of sealing material is used in this configuration?

  This configuration features a high-performance fluorocarbon (Viton) O-ring sealing system, which provides excellent resistance to hot synthetic lubricants and chemicals.

• Can I use this aluminum housing in highly corrosive marine environments?

  While anodized aluminum offers good general corrosion protection, a stainless steel housing option (31000 variant with alternative suffix) is recommended for continuous exposure to saltwater or marine environments.

• What is the maximum pressure rating for this housing assembly?

  The 31000 housing assembly is rated for a maximum static differential pressure of 15 psi (1.0 bar) across the internal-to-external sealing face.

• What size conduit fittings are required for this specific model?

  The "10" and "00" option codes specify 3/4-14 NPT threads for both the conduit fitting and the explosion-proof thread entries.