Bently Nevada 21022-30-10-017-03 Probe Housing Overview

The Bently Nevada 21022-30-10-017-03 is a dual axial probe housing assembly made in the USA. This assembly consists of two proximity probes installed in an externally mounted protective enclosure. It mounts on the end of a machine nearest the thrust bearing. Both probes observe the end of the shaft for axial thrust position movement. The enclosure protects the proximity probes, probe leads, and extension cables from environmental factors. These factors include dust, splashing liquid, and other industrial hazards. Consequently, the 21022-30-10-017-03 meets the American Petroleum Institute's (API) 670 Standard for axial thrust position transducer housings.

Ordering Configuration Details

The Bently Nevada 21022-30-10-017-03 includes specific ordered options. Probe option 30 specifies a 3300 XL 11 mm probe with multiple approvals. Probe cable length option 10 provides 1.0 metre (39 inches) of cable. Note that the 3300 XL 11 mm probe is not available with 0.5 meter cable length. Probe penetration option 017 sets the probe penetration at 1.7 inches from the housing. Fittings option 03 includes two cable seal grips with grommets for various cable sizes. Specifically, these sizes are 1/8-in to 3/16-in, 1/4-in to 5/16-in, and 5/16-in to 3/8-in. Additionally, two 3/4-14 to 1/2-14 NPT reducers are supplied. The fittings option is supplied as a kit and is not installed when the housing is shipped.

Mechanical Construction

The Bently Nevada 21022-30-10-017-03 uses high quality materials throughout. The enclosure is aluminum alloy housing (sand cast, 0.3% copper free) for corrosion resistance. Sleeves are fabricated from 304 stainless steel for durability and probe retention. The enclosure mounts on the machine case using four standard machine screws. Probes are mounted in sleeve/adapter assemblies installed directly onto the machine case. These assemblies go through two 3/4-in NPT threaded holes in the machine case. A removable cover on the enclosure provides access for setting the probe gaps. Total weight of the assembly is 3.6 kg (8 lb) .

API 670 Compliance & Benefits

The Bently Nevada 21022-30-10-017-03 meets API 670 Standard requirements. This compliance ensures suitability for critical turbomachinery applications. External mounting allows probe adjustments from outside the machine. Therefore, you can set probe gaps without opening the machine casing. This feature significantly reduces maintenance time and safety risks. The enclosure protects all sensitive components from environmental damage. As a result, the 21022-30-10-017-03 delivers reliable axial position measurement in harsh conditions.

Key Features & Benefits

• Dual probe configuration – The 21022-30-10-017-03 houses two proximity probes for redundancy.

• API 670 compliant – Meets American Petroleum Institute standards for thrust position monitoring.

• External adjustments – Set probe gaps without opening the machine casing.

• Robust construction – Aluminum alloy housing with 304 stainless steel sleeves.

• Complete environmental protection – Seals protect against dust, splashing liquids, and contaminants.

• Flexible cable sealing – Includes multiple grommet sizes for different cable diameters.

Installation Guidelines

Follow these steps to install the Bently Nevada 21022-30-10-017-03 correctly. First, prepare two 3/4-in NPT threaded holes on the machine end cover. Second, mount the housing on the machine case using four standard machine screws. Third, install the sleeve/adapter assemblies into the 3/4-in NPT holes. Fourth, insert the 3300 XL 11 mm probes into the sleeves at the correct penetration depth. Fifth, route the 1.0 meter probe cables through the cable seal grips. Finally, remove the cover to set the probe gaps to the recommended 2.5 mm (100 mils) for 11 mm probes.

Install the fittings kit components as needed for your specific cable sizes. Do not overtighten the cable seal grips to avoid cable damage. The 21022-30-10-017-03 requires proper grounding for electrical noise immunity. Use thread sealant on the NPT connections to prevent liquid ingress.

Package Contents

Your shipment includes the following items:

• 1 x Bently Nevada 21022-30-10-017-03 dual axial probe housing assembly

• 2 x 3300 XL 11 mm proximity probes with 1.0 meter cables (pre-installed in sleeves)

• 1 x Fittings kit (two cable seal grips with grommets, two NPT reducers)

• 1 x Installation manual with API 670 compliance documentation

• 4 x Mounting screws for housing attachment to machine case

No extension cables are included with the 21022-30-10-017-03. Therefore, you must order these separately based on your Proximitor sensor location. Likewise, no Proximitor sensors are provided.

Frequently Asked Questions (FAQ)

1. What is the purpose of a dual axial probe housing?
The 21022-30-10-017-03 holds two probes monitoring axial thrust position. Dual probes provide redundancy per API 670 requirements for critical machinery.

2. Can I use this housing with 8 mm probes instead of 11 mm?
No. The Bently Nevada 21022-30-10-017-03 is specifically designed for 3300 XL 11 mm probes. 8 mm probes require a different housing model.

3. What does the probe penetration option 017 mean?
Penetration option 017 means the probe tip extends 1.7 inches from the housing mounting surface. This depth positions the probe correctly relative to the thrust collar.

4. Why are the fittings not pre-installed on the housing?
The 21022-30-10-017-03 fittings kit allows custom installation. Different cable sizes require different grommets. Therefore, you install the appropriate fittings during field installation.

5. Is this housing suitable for hazardous area installations?
The housing itself is passive mechanical hardware. However, the included 3300 XL 11 mm probes have multiple approvals. Check the specific probe approval option for your zone classification.

Why Choose the Bently Nevada 21022-30-10-017-03?

This dual axial probe housing assembly delivers reliable thrust position monitoring for critical turbomachinery. For starters, the Bently Nevada 21022-30-10-017-03 meets API 670 Standard requirements. Its aluminum alloy housing with 304 stainless steel sleeves provides excellent durability. The external mounting design allows probe gap adjustments without opening the machine case. Consequently, maintenance becomes safer and faster compared to internal mounting. The included fittings kit accommodates various cable sizes for installation flexibility. Dual 3300 XL 11 mm probes provide redundant measurement per API recommendations. Furthermore, the removable cover offers convenient access for gap setting and verification. Most importantly, the 21022-30-10-017-03 protects sensitive components from dust, splashing liquid, and other environmental hazards.

Order the Bently Nevada 21022-30-10-017-03 today for your axial thrust position monitoring needs. This housing assembly is perfect for steam turbines, gas turbines, centrifugal compressors, and other critical rotating machinery requiring API 670 compliant thrust measurement.