Bently 21000‑16‑10‑15‑256‑03‑02

Bently 21000‑16‑10‑15‑256‑03‑02

Product Brief Introduction: This heavy‑duty all‑metal housing assembly is engineered for external mounting of 3300 XL 8 mm reverse‑mount proximity probes. It is equipped with 1.5‑inch standoff adapter and extremely long 25.6‑inch probe penetration sleeve, specially designed for ultra‑thick‑wall bearing housings on oversized turbomachinery units. It provides explosion‑proof protection, mechanical retention and multi‑point sealing for proximity probes installed in hazardous‑area environments. The 1.5‑inch standoff adapter creates physical clearance between housing main‑body and equipment mounting face, bypassing surrounding mechanical obstacles such as reinforcing ribs, flanges and pipe supports. Operators can perform gap adjustment and probe replacement externally without machine disassembly. The assembly complies fully with API‑670 standard and carries CSA Type 4 explosion‑proof certification for petrochemical and power‑plant critical machinery monitoring system

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Description

Bently 21000‑16‑10‑15‑256‑03‑02

  • Technical Specifications
    • Compatible Probe Model: 3300 XL 8 mm reverse‑mount proximity probe
    • Probe Integrated Cable Length: 1.0 m (39 inch)
    • Standoff Adapter Length: 1.5 inch offset adapter
    • Probe Penetration Depth: 25.6 inch (650.2 mm)
    • Accessory Fitting Kit: Code 03, including 3/4‑14 NPT plug, 3/4‑14 to 1/2‑14 NPT reducer, multi‑size cable seal grip and grommet accessories
    • Mounting Thread Specification: 3/4‑14 NPT thread
    • Main Housing Body Material: High‑grade 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 ~ +85 °C
    • Storage Temperature Range: -50 °C ~ +110 °C
    • Typical Net Weight: 1.1 kg excluding external conduit fittings
  • Functional Features: 1.5‑inch standoff adapter effectively circumvents mechanical obstructions near bearing housing mounting surface. Extra‑long 25.6‑inch stainless‑steel probe sleeve meets installation requirement for ultra‑thick‑wall heavy turbomachinery bearing housings. All‑metal explosion‑proof housing shields internal proximity probe assembly from mechanical impact, dust, oil mist and corrosive vapour. Comprehensive multi‑O‑ring sealing system prevents moisture and process medium ingress. 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 set of installation sealing and conduit accessories are supplied together with the assembly. The housing maintains stable probe‑shaft relative spatial position under sustained high‑level machinery vibration. External‑access design enables gap tuning and probe replacement without disassembling machine casing.
  • Application Scenarios: Oversized steam turbine and ultra‑large centrifugal compressor monitoring projects with extra‑thick cast bearing housings. Installation locations with surrounding mechanical obstructions on bearing housing outer face. Shaft radial vibration and thrust position measurement in refineries, chemical plants and power stations hazardous classified zones. Machinery protection systems which strictly follow API‑670 industry standard.
  • Performance Parameters: Rigid mechanical structure ensures fixed probe‑to‑target offset will not shift under long‑term cyclic vibration. Multi‑layer elastomer sealing assembly retains sealing performance under hot oily industrial atmosphere. Explosion‑proof enclosure satisfies CSA certification requirement for gas hazardous‑area deployment. Standoff adapter structural strength resists bending stress caused by long heavy probe sleeve. The housing assembly brings no negative influence to electromagnetic performance of matched eddy‑current proximity probe.
  • Material Composition: Main housing body is high‑strength cast aluminum alloy with anti‑corrosion surface finishing. Extra‑long probe sleeve is precision‑fabricated from 304 stainless steel to guarantee 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, ultra‑long 25.6‑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 serves as mechanical fixture and environmental protective housing for reverse‑mount eddy‑current proximity probe. Proximity probe is locked securely inside ultra‑long stainless‑steel sleeve. The whole housing assembly is mounted externally onto bearing housing surface, with standoff adapter providing clearance from surrounding 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. The installed proximity probe performs non‑contact displacement and dynamic vibration measurement relying on eddy‑current inductive principle.
  • Installation Requirements: Apply high‑temperature compatible thread sealant on all mounting threads during installation. Confirm every O‑ring component sits fully inside corresponding machining grooves before tightening dome cover. Adjust probe penetration depth to make static working gap fall within linear measurement range of matched 3300 XL 8 mm proximity probe. Connect field‑site metal conduit to housing side threaded port for cable protection. Fully fasten dome‑cover thread to maintain explosion‑proof enclosure integrity. Check mechanical clearance to ensure long probe sleeve will not collide with internal machine components. Strictly implement API‑670 installation guidelines for turbomachinery sensor mounting.
  • Usage Notes: Take extreme care for transportation and field installation; ultra‑long slender probe sleeve is highly susceptible to bending deformation caused by impact force. Never operate rotating machinery with damaged, cracked or missing O‑ring sealing parts. Regularly check dome‑cover and standoff adapter thread tightening status under continuous high‑vibration working conditions. Any field machining, cutting or mechanical modification of housing assembly is strictly forbidden. All maintenance work in hazardous classified zones shall comply fully with site safety management protocols. Do not apply excessive torque to dome cover to avoid thread damage.

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