21022-12-05-020-04 | Bently Nevada Dual Axial Probe Housing Assembly

Introduction to the Bently Nevada 21022-12-05-020-04

When axial thrust position monitoring demands precision and durability, the 21022-12-05-020-04 from Bently Nevada delivers a robust solution. This dual axial probe housing assembly is designed for mounting on machine ends near the thrust bearing. It allows two proximity probes to observe the shaft end for axial thrust position movement. The enclosure mounts using four standard machine screws, ensuring secure installation.

Key Features and Technical Specifications

• The 21022-12-05-020-04 includes two 3300 XL 8 mm probes with 0.5 meter (20 in) probe cable length.
• Probe penetration option is 2.0 inches.
• Fittings option includes three 3/4-14 NPT plugs supplied as a kit (not installed when shipped).
• The housing is made of aluminum alloy (sand cast, 0.3% copper free) with 304 stainless steel sleeves.
• Total weight is 3.6 kg (8 lb).
• Meets API 670 Standard for axial thrust position transducer housings.

A distinctive feature is the external mounting design that allows probe adjustments from outside the machine. This reduces downtime and simplifies maintenance.

Applications and Use Cases

In industrial rotating machinery such as turbines, compressors, and pumps, the 21022-12-05-020-04 provides critical axial position monitoring. It helps prevent thrust bearing damage by detecting shaft movement early. The housing protects probes from dust, splashing liquid, and other environmental factors. This makes it suitable for harsh environments in oil and gas, power generation, and petrochemical facilities.

Installation and Setup

Mount the enclosure on the machine case using four standard machine screws. The probes install into sleeve/adapter assemblies, which fit into two 3/4-in NPT threaded holes on the machine case. A removable cover provides access for setting probe gaps. The fittings kit (three 3/4-14 NPT plugs) is supplied separately and should be installed per the manual.

Maintenance and Reliability

Regular inspection of the housing and probe connections ensures long-term reliability. The aluminum alloy and stainless steel construction resist corrosion. Periodic checks of the probe gap settings help maintain accurate readings. Following the manufacturer's maintenance schedule reduces unexpected downtime.

Frequently Asked Questions

Q: What is the probe type included with the 21022-12-05-020-04?

A: It includes two 3300 XL 8 mm proximity probes.

Q: What is the probe cable length?

A: The cable length is 0.5 meter (20 inches).

Q: Does the housing meet any industry standards?

A: Yes, it meets the API 670 Standard for axial thrust position transducer housings.

Q: What material is the housing made of?

A: The housing is aluminum alloy (sand cast, 0.3% copper free) with 304 stainless steel sleeves.

Q: Are the fittings pre-installed when shipped?

A: No, the fittings (three 3/4-14 NPT plugs) are supplied as a kit and are not installed when the housing is shipped.

Product Support and Availability

The Bently Nevada 21022-12-05-020-04 is available from Petro Auto Tech. Contact us for current stock and lead times. We provide expert support to help you select the right components for your application.