Bently 21000‑16‑05‑15‑072‑03‑02

Bently 21000‑16‑05‑15‑072‑03‑02

Product Brief Introduction: This all‑metal explosion‑proof housing assembly is designed for external installation of 3300 XL 8 mm reverse‑mount proximity probes. It features 0.5‑meter factory‑integrated probe cable, 1.5‑inch standoff adapter and 7.2‑inch probe penetration depth. The 1.5‑inch standoff adapter creates physical clearance to avoid mechanical interference from structures near bearing housing mounting surface. 7.2‑inch penetration sleeve adapts for thick‑wall cast bearing housings of large turbomachinery. The assembly provides mechanical fixation, multi‑layer sealing and explosion‑proof protection for proximity probes within hazardous‑area industrial environment. Operators can adjust probe gap and replace probe components externally without machine disassembly. It fully meets API‑670 machinery protection specification and holds CSA Type 4 explosion‑proof certification for petrochemical and power‑plant site application.

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Bently 21000‑16‑05‑15‑072‑03‑02

  • Technical Specifications
    • Compatible Probe Model: 3300 XL 8 mm reverse‑mount proximity probe
    • Probe Integrated Cable Length: 0.5 m (20 inch)
    • Standoff Adapter Length: 1.5‑inch offset adapter
    • 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 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: 1.5‑inch standoff adapter bypasses surrounding mechanical obstacles near bearing housing mounting face. 7.2‑inch stainless‑steel probe sleeve suits thick‑wall bearing housing structure of large turbomachinery. All‑metal explosion‑proof housing protects internal proximity probe assembly from mechanical impact, dust, oil mist and corrosive vapour. Comprehensive multi‑O‑ring sealing system blocks ingress of moisture and process medium. Adjustable probe penetration depth supports precise static gap calibration for eddy‑current transducer system. Side threaded conduit ports offer protected mechanical routing for probe extension cables. Full installation‑related sealing and conduit accessories are delivered as one complete set. The assembly maintains stable probe‑shaft relative spatial position under sustained high‑amplitude machinery vibration. External‑access design enables gap tuning and probe replacement without machine casing disassembly.
  • Application Scenarios: Large steam turbine and heavy centrifugal compressor monitoring projects with thick‑wall bearing housings and surrounding mechanical obstructions on mounting surface. Shaft radial vibration and thrust bearing axial displacement measurement for refineries, chemical plants and power‑plant hazardous‑area locations. Machinery protection systems complying with API‑670 industry standard.
  • Performance Parameters: Rigid mechanical structure keeps fixed probe‑to‑target offset without shifting under long‑term cyclic machinery vibration. Multi‑layer elastomer sealing assembly retains full sealing performance under hot oily industrial atmosphere. Explosion‑proof enclosure meets CSA certification requirement for gas hazardous‑area deployment. Standoff adapter structural strength resists bending stress of long probe sleeve. Housing assembly brings no negative impact to electromagnetic performance of matched eddy‑current proximity probe.
  • Material Composition: Main housing body is high‑strength cast aluminum alloy with anti‑corrosion surface treatment. 7.2‑inch probe sleeve is precision‑machined from 304 stainless steel for high mechanical rigidity. 1.5‑inch standoff adapter is aluminum alloy machined component. Sealing elements are oil‑resistant industrial elastomer O‑rings. Dome cover is metal threaded component. NPT conduit fittings are anti‑rust treated carbon steel.
  • Structural Characteristics: Pre‑assembled unit includes threaded dome cover, aluminum main housing body, 7.2‑inch stainless‑steel probe sleeve, 1.5‑inch standoff adapter, complete O‑ring sealing set and full conduit accessory kit. Dome cover connects to main housing body via heavy‑duty threaded joint. Side threaded ports are reserved for field metal conduit installation. Internal cavity accommodates reverse‑mount proximity probe assembly. All sealing grooves are precisely machined for correct O‑ring positioning. Standoff adapter is installed between housing main‑body and machine mounting thread interface.
  • Working Principle: The assembly works as mechanical fixture and environmental protective enclosure for reverse‑mount eddy‑current proximity probe. Proximity probe is locked securely inside stainless‑steel probe sleeve. Whole housing assembly mounts externally onto bearing housing surface, standoff adapter provides clearance from surrounding mechanical obstacles. Mechanical structure holds probe tip at stable spatial distance relative to rotating shaft target. Multi‑O‑ring seals isolate internal probe assembly from external harsh industrial environment. Installed proximity probe executes non‑contact displacement and dynamic vibration measurement by eddy‑current inductive principle.
  • Installation Requirements: Apply high‑temperature compatible thread sealant to all mounting threads during field installation. Verify all O‑ring components sit fully inside corresponding machining grooves before tightening dome cover. Adjust probe penetration depth to make static working gap locate within linear measurement range of matched 3300 XL 8 mm proximity probe. Connect field‑site metal conduit to housing side threaded port for cable mechanical protection. Fully fasten dome‑cover thread to guarantee explosion‑proof enclosure integrity. Check mechanical clearance to ensure probe sleeve will not collide with internal machine components. Strictly follow API‑670 installation guidelines for turbomachinery sensor mounting.
  • Usage Notes: Handle carefully during transportation and installation; long probe sleeve is vulnerable to bending damage caused by mechanical impact. Never run rotating equipment with damaged, aging or missing O‑ring sealing components. Periodically inspect dome‑cover and standoff adapter thread tightening condition under continuous high‑vibration working environment. Any field machining, cutting or mechanical modification to housing assembly is strictly prohibited. All maintenance operations inside hazardous classified zones must comply fully with site safety management protocols. Do not apply excessive torque on dome cover to avoid thread galling damage.

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