Product Overview

The Bently Nevada 21022-28-05-010-00 is a Dual Axial Probe Housing Assembly. It consists of two proximity probes installed in an externally mounted protective enclosure.

This assembly is intended for mounting on the end of a machine nearest the thrust bearing. Consequently, both probes can observe the end of the shaft for axial thrust position movement. The housing meets the American Petroleum Institute's (API) 670 Standard for axial thrust position transducer housings.

Ordering Information Breakdown

The 21022-28-05-010-00 follows a specific ordering code structure.

• 21022: Dual Axial Probe Housing Assembly base model.

• 28: 3300 XL 8 mm probe with multiple approvals.

• 05: 0.5 metre (20 inch) probe cable length.

• 010: 1.0 inch probe penetration.

• 00: Without fittings (fittings are supplied as a separate kit).

Important Note: The 3300 XL 11 mm probe is not available with the 0.5 meter probe cable length.

General Specifications

The 21022-28-05-010-00 offers robust mechanical protection for proximity probes.

• Manufacturer: Bently Nevada.

• Product Type: Dual Axial Probe Housing Assembly.

• Probe Option: 3300 XL 8 mm probe with multiple approvals.

• Probe Cable Length: 0.5 metre (20 inches).

• Probe Penetration: 1.0 inch.

• Fittings Option: Without fittings (supplied as a kit, not pre-installed).

• Country of Origin: Made in U.S.A.

Mechanical Specifications

The 21022-28-05-010-00 uses high-quality materials for durability.

• Housing Material: Aluminum alloy (sand cast, 0.3% copper free).

• Sleeve Material: 304 stainless steel.

• Total Weight: 3.6 kg (8 lb).

Mounting Configuration

The enclosure mounts on the machine case using four standard machine screws. The probes are mounted in sleeve/adapter assemblies. These assemblies install directly onto the machine case through two 3/4-inch NPT threaded holes. Therefore, installation is straightforward and secure.

API 670 Compliance

The dual axial position housing meets the American Petroleum Institute's (API) 670 Standard for axial thrust position transducer housings. As a result, it is suitable for critical turbomachinery applications requiring API compliance.

Key Features

The 21022-28-05-010-00 offers several advantages for axial thrust monitoring.

External Mounting Design:
Allows probe adjustments from outside the machine. Consequently, maintenance personnel do not need to enter the machine case. This saves time and improves safety.

Environmental Protection:
Protects the proximity probes, probe leads, and extension cables from dust, splashing liquid, or other environmental factors. Thus, the system remains reliable in harsh conditions.

Removable Cover:
A removable cover on the enclosure provides access for setting the probe gaps. Therefore, gap adjustments are quick and convenient.

API 670 Compliance:
Meets the standard for axial thrust position transducer housings. Hence, it is approved for use in API-compliant machinery protection systems.

Dual Probe Configuration:
Two proximity probes observe the end of the shaft. This provides redundancy for critical thrust position measurements.

Corrosion-Resistant Materials:
The aluminum alloy housing is sand cast with 0.3% copper free material. The sleeves are fabricated from 304 stainless steel. Consequently, the assembly resists corrosion in industrial environments.

Probe Specifications

The 21022-28-05-010-00 includes two 3300 XL 8 mm probes.

• Probe Type: 3300 XL 8 mm.

• Probe Cable Length: 0.5 metre (20 inches).

• Probe Penetration: 1.0 inch.

• Approvals: Multiple approvals included.

Fittings Information

The fittings option is supplied as a kit. Importantly, fittings are not installed when the housing is shipped. Therefore, the -00 option means you will receive the fittings separately for field installation.

Typical Applications

The 21022-28-05-010-00 suits various axial thrust monitoring applications.

• Steam turbine thrust position monitoring.

• Gas compressor axial position measurement.

• Hydro turbine thrust bearing protection.

• Centrifugal compressor axial thrust detection.

• API 670 compliant machinery protection systems.

Installation Guidelines

Install the 21022-28-05-010-00 on the end of the machine nearest the thrust bearing. First, mount the enclosure on the machine case using four standard machine screws.

Next, install the sleeve/adapter assemblies through the two 3/4-inch NPT threaded holes. Then, install the 3300 XL 8 mm probes into the sleeves with the specified 1.0 inch penetration. The probe cable length is 0.5 metre.

After installation, remove the cover to set the probe gaps. Set the gaps according to the 3300 XL 8 mm proximity system specifications. Finally, install the fittings from the supplied kit. The housing protects the probes, leads, and extension cables from environmental factors.

What is in the Box

Please inspect all items upon delivery.

• Bently Nevada 21022-28-05-010-00 dual axial probe housing assembly.

• Two 3300 XL 8 mm probes with 0.5 metre cables.

• Aluminum alloy housing with 304 stainless steel sleeves.

• Removable cover for gap access.

• Fittings kit (not pre-installed).

• Installation instruction manual.

Frequently Asked Questions (FAQ)

1. What type of probes are included with the 21022-28-05-010-00?

The 21022-28-05-010-00 includes two 3300 XL 8 mm probes. The -28 option specifies this probe type with multiple approvals.

2. What is the probe cable length for this assembly?

The probe cable length is 0.5 metre (20 inches). The -05 option specifies this length. Note that the 3300 XL 11 mm probe is not available with this cable length.

3. Does this housing meet API standards?

Yes. The 21022-28-05-010-00 meets the American Petroleum Institute's (API) 670 Standard for axial thrust position transducer housings.

4. Are the fittings pre-installed on the housing?

No. The -00 option specifies without fittings. The fittings are supplied as a separate kit and are not installed when the housing is shipped.

5. What is the weight of this housing assembly?

The 21022-28-05-010-00 weighs 3.6 kg (8 lb). The housing is made of aluminum alloy with 304 stainless steel sleeves.