Description
Bently 21000‑16‑05‑15‑038‑03‑02
- Technical Specifications
- Compatible probe model: 3300 XL 8 mm reverse‑mount proximity probe
- Main housing body material: High‑strength aluminium alloy
- Probe sleeve material: 304 stainless steel
- Standoff adapter dimension: 1.5‑inch stand‑off (code 15)
- Probe penetration depth: 3.8‑inch penetration into bearing housing (code 038)
- Accessory kit (code 03): NPT plug, reducer adapters, cable sealing gland and grommet set
- Mounting thread specification: 3/4‑14 NPT thread (code 02)
- Enclosure rating: CSA Type 4; explosion‑proof certification; conforms strictly to API‑670 standard
- Functional Features: External installation style, probe does not require insertion through internal machine pressure boundary. Explosion‑proof all‑metal construction protects probe assembly inside classified hazardous zones. Adjustable probe penetration depth allows accurate static‑gap calibration. Multiple O‑ring sealing system blocks oil mist, dust and moisture ingress. Side conduit threaded ports provide protected routing for probe extension cable. All mounting and sealing accessories supplied together, no separate‑part procurement required. Maintains stable probe‑to‑shaft spatial position under continuous machinery vibration.
- Application Scenarios: External probe mounting for steam turbines, centrifugal compressors and large process pumps in power‑plant and refinery sites. Shaft radial vibration and thrust‑position monitoring projects complying with API‑670 requirements in hazardous classified locations. Used for bearing housings with moderate wall thickness.
- Performance Parameters: Preserves fixed probe‑target gap relationship under long‑term machine vibration. Multi‑layer sealing system maintains integrity against oil and vapour contamination. Certified enclosure meets explosion‑proof requirements for gas‑classified hazardous locations.
- Material Composition: Aluminium alloy main housing body; precision‑machined 304 stainless‑steel probe sleeve. Nitrile elastomer O‑ring sealing components. Metal dome cover and NPT threaded pipe fittings.
- Structural Characteristics: Pre‑assembled assembly consists of dome cover, main housing body, threaded probe sleeve, 1.5‑inch stand‑off adapter, multiple sealing O‑rings and conduit accessory hardware. Dome cover connects via thread interface to main housing body. Side threaded ports prepared for field conduit connection.
- Working Principle: Functions as mechanical fixture plus environmental protective enclosure. Reverse‑mount eddy‑current proximity probe is secured inside sleeve of housing assembly. Whole unit threads onto outer surface of machine bearing housing. Housing holds probe at fixed spatial offset relative to rotating shaft target and provides sealing and mechanical shielding. Probe itself executes displacement measurement by eddy‑current sensing principle.
- Installation Requirements: Apply approved thread sealant onto mounting threads during installation. Confirm every O‑ring component sits correctly inside corresponding groove before closing dome cover. Adjust probe penetration depth so final static gap locates within probe linear working range. Connect field‑site metal conduit to housing conduit port. Fully tighten dome‑cover thread to preserve explosion‑proof enclosure integrity. Follow all API‑670 recommended installation practice.
- Usage Notes: Protect threaded surfaces from impact damage during handling and assembly. Never operate machinery with damaged, deformed or missing O‑ring seals. Under high continuous‑vibration operating conditions, periodically check dome‑cover tightening torque. Any mechanical modification or machining to housing assembly is strictly forbidden. All maintenance operations within hazardous zones must comply fully with site safety protocols.
