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The 31000-26-05-00-040-01-02 is an online-adjustable protective housing compliant with the API 670 Standard. It is utilized for continuous online monitoring of radial vibration and Keyphasor signals on rotating machinery, such as steam turbines, compressors, high-pressure pumps, and fans. Its mechanical function allows external probe gap adjustment or probe replacement while the machine remains in operation, preventing unscheduled downtime and supporting the stability of factory assets.
Compliant with API 670 Standard
IP66 / Type 4X Extreme Environment Protection
Explosion-proof certification, suitable for highly hazardous explosive gas environments
The 31000-26-05-00-040-01-02 is the preferred solution when mounting proximity probes through the machine case and represents an industry best practice for radially mounted transducers whether for vibration or keyphasor measurements. the use of this proximity probe housing allows external access to the built-in 3300 xl nsv proximity probe and its 0.5-meter (20-inch) extension cable, permitting convenient gap adjustment or probe replacement without disassembly of the machine.
The housing body is made of polyphenylene sulfide (PPS), an advanced, high-strength thermoplastic with excellent corrosion resistance, while other critical elements of the assembly are constructed from durable, corrosion-resistant stainless steel. This specific configuration features a 4.0-inch probe penetration depth, a 3/4-14 NPT mounting thread, and includes one M25 conduit fitting and two plugs for robust cable management. The 31000 series housing assembly is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings. Furthermore, when installed in conjunction with an approved transducer system and appropriate intrinsically safe (I.S.) barriers, it is fully certified for use in intrinsically safe hazardous area applications.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil & Gas Exploration and Transportation
Monitoring shaft vibration of gas turbines and large compressors on offshore drilling platforms or long-distance pipelines.
Petrochemical & Refining
Implementing API 670-compliant online safety condition monitoring for critical units like charge gas compressors and hydrotreater pumps.
Thermal Power Generation
Monitoring shaft axial/radial displacement and vibration of high-power steam turbine generators, boiler feedwater pumps, and draft fans.
Nuclear Power Generation
Applied in the long-term reliability monitoring of rotating equipment such as main feedwater pumps and steam generator circulation pumps outside the nuclear island.
Hydroelectric Power Generation
Monitoring the runout, eccentricity, and thrust bearing Keyphasor signals of hydro-generator shafts.
Steel & Metallurgy
Protecting core dynamic equipment such as blast furnace blowers and Top Gas Recovery Turbine (TRT) units in ironmaking.
When using the 31000-26-05-00-040-01-02 housing, ensure strictly sealed M25 fittings and 3/4-14 NPT threads against oil and water ingress. Use ClickLoc tools for gap adjustment without pulling cables, and pair with compliant proximitors and safety barriers in hazardous areas to guarantee safety.
It is a Bently Nevada 31000 series Proximity Probe Housing Assembly, which typically comes factory-installed with a specific proximity probe inside.
What is the core advantage of using an externally mounted housing like 31000-26-05-00-040-01-02?
It allows engineers to perform gap adjustments or probe replacements directly from the outside of the casing without disassembling the machine (such as removing bearing covers), drastically reducing downtime.
What materials are used to manufacture the 31000-26-05-00-040-01-02?
The housing main body is made of high-strength glass-reinforced polyphenylene sulfide (PPS) thermoplastic for excellent corrosion resistance, while internal metal components are made of stainless steel.
What industrial protection ratings can the 31000-26-05-00-040-01-02 provide?
The assembly meets IP66 and NEMA 4X standards, providing protection against water spray and oil ingress in harsh industrial environments.
What is the mounting thread specification for 31000-26-05-00-040-01-02?
Its mounting thread specification is 3/4-14 NPT tapered pipe thread.
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