Bently 21000‑16‑10‑00‑072‑03‑02

Bently 21000‑16‑10‑00‑072‑03‑02

Product Brief Introduction: This all‑metal explosion‑proof housing assembly is purpose‑built for external installation of 3300 XL 8 mm reverse‑mount eddy‑current proximity probes on heavy‑duty turbomachinery bearing housings. Zero‑standoff structural design enables direct flush mounting against bearing housing outer surface without additional offset adapter. The 7.2‑inch deep probe penetration sleeve is optimized for thick‑wall cast bearing housings commonly found on large steam turbines and process centrifugal compressors. It delivers reliable mechanical fixation, multi‑layer environmental sealing and explosion‑proof protection for internal proximity probes within hazardous classified industrial zones. Operators can adjust probe gap and replace probe components externally without complete machine disassembly, significantly reducing equipment maintenance downtime.

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Bently 21000‑16‑10‑00‑072‑03‑02

  • Technical Specifications
    • Compatible Probe Model: 3300 XL 8 mm reverse‑mount proximity probe
    • Probe Integrated Cable Length: 1.0 m (39 inch)
    • Standoff Adapter Configuration: Zero standoff, no offset adapter installed
    • Probe Penetration Depth: 7.2 inch (182.9 mm)
    • Accessory Fitting Kit: Code 03, including 3/4‑14 NPT plug, 3/4‑14 to 1/2‑14 NPT reducer, multi‑range cable seal grip and grommet sets
    • Mounting Thread Specification: 3/4‑14 NPT thread
    • Main Housing Body Material: High‑strength industrial aluminum alloy
    • Probe Sleeve Material: 304 stainless steel
    • Enclosure Rating: CSA Type 4, explosion‑proof certified for hazardous gas classified locations
    • Operating Ambient Temperature Range: -40 °C ~ +100 °C
    • Storage Temperature Range: -50 °C ~ +120 °C
    • Typical Net Weight: 1.1 kg without external conduit fittings
  • Functional Features: Zero‑standoff flush mounting profile fits closely against machine housing surface, saving installation space. Long‑length stainless‑steel probe sleeve adapts for extra‑thick bearing housing wall structures. Multi‑O‑ring sealing system effectively blocks ingress of oil mist, process steam, dust and moisture. Explosion‑proof all‑metal construction provides robust mechanical shielding for internal proximity probe assembly. Adjustable probe penetration depth supports precise static gap calibration for eddy‑current measurement. Side threaded conduit ports offer protected routing for probe extension cables. All installation‑related sealing and conduit accessories are pre‑packaged in one delivery set. The assembly maintains stable spatial relative position between probe tip and rotating shaft target under continuous high‑amplitude machinery vibration. External access design allows gap tuning and probe replacement without opening machine pressure boundary.
  • Application Scenarios: External probe mounting projects for large steam turbines, heavy‑duty centrifugal compressors with thick cast bearing housings. Widely applied in power generation plants, refineries and petrochemical complex facilities. Used for shaft radial vibration monitoring and thrust bearing axial displacement measurement in API‑670 compliant machinery protection systems. Suitable for hazardous classified locations where explosion‑proof enclosure certification is mandatory.
  • Performance Parameters: Housing assembly retains fixed probe‑to‑target offset under long‑term continuous operational vibration. Multi‑layer elastomer sealing maintains full integrity under prolonged exposure to hot oily industrial atmosphere. Explosion‑proof structure meets CSA requirements for gas hazardous area installation. Threaded connections resist loosening under cyclic vibration conditions. The assembly does not interfere with eddy‑current probe electromagnetic field, ensuring full measurement accuracy of matched proximity probe system.
  • Material Composition: Main housing body adopts high‑strength cast aluminum alloy with anti‑corrosion surface treatment. Deep‑length probe sleeve is precision‑machined from 304 stainless steel for high mechanical rigidity and corrosion resistance. Sealing components are made of oil‑resistant elastomer O‑rings. Dome cover is metal threaded structure. NPT threaded pipe fittings are carbon steel with anti‑rust coating.
  • Structural Characteristics: Pre‑assembled complete unit consists of threaded dome cover, aluminum main housing body, long 7.2‑inch stainless‑steel probe sleeve, zero‑standoff mounting base, multiple sealing O‑ring components and full conduit accessory kit. Dome cover connects with main housing body via heavy‑duty threaded interface. Side threaded ports are reserved for metal field conduit connection. Internal cavity accommodates reverse‑mount proximity probe assembly. All sealing grooves are precisely machined for proper O‑ring positioning.
  • Working Principle: The assembly acts as mechanical fixture and environmental protective enclosure for reverse‑mount eddy‑current proximity probe. The proximity probe is securely fixed inside the long stainless‑steel sleeve. The whole housing unit threads directly onto the outer surface of machine bearing housing. The mechanical structure locks probe at stable spatial offset relative to rotating shaft target. Multi‑O‑ring seals isolate internal probe assembly from external harsh plant environment. The installed proximity probe executes non‑contact displacement and vibration measurement based on eddy‑current inductive effect.
  • Installation Requirements: Apply approved high‑temperature resistant thread sealant onto all mounting threads during field installation. Verify all O‑ring components are fully seated inside corresponding machining grooves before screwing down dome cover. Adjust probe penetration depth carefully to set static working gap within linear measurement range of matched 3300 XL 8 mm proximity probe. Connect field metal conduit to housing side threaded port for cable mechanical protection. Fully tighten dome‑cover thread to guarantee explosion‑proof enclosure integrity. Ensure mounting surface of bearing housing is flat and free of burr, rust and thick paint. Follow all API‑670 recommended installation specifications for turbomachinery monitoring sensor mounting.

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