21022-28-10-XXX-02 MOD 17480-122 | Bently Nevada Dual Axial Probe Housing Assembly

Introduction to the 21022-28-10-XXX-02 MOD 17480-122

When precise axial thrust position monitoring is critical for machinery protection, the 21022-28-10-XXX-02 MOD 17480-122 from Bently Nevada delivers a robust solution. This dual axial probe housing assembly is engineered for mounting on the end of a machine nearest the thrust bearing, allowing both probes to observe the shaft end for axial thrust movement. Designed to meet the American Petroleum Institute’s API 670 Standard, this assembly ensures reliable performance in demanding industrial environments.

Key Features and Technical Specifications

• Probe Option: 28 = 3300 XL 8 mm probe with multiple approvals
• Probe Cable Length: 10 = 1.0 metre (39 in)
• Probe Penetration: XXX = Probe Penetration Length (order in increments of 0.1 in / 2.54 mm)
• Fittings Option: 02 = Two 3/4-14 NPT fittings and two 3/4-14 NPT plugs (supplied as kit, not installed)
• Housing Material: Aluminum alloy (sand cast, 0.3% copper free) with 304 stainless steel sleeves
• Weight: 3.6 kg (8 lb)

The 21022-28-10-XXX-02 MOD 17480-122 uses a 3300 XL 8 mm probe, providing reliable proximity sensing. The housing protects probes, leads, and extension cables from dust and splashing liquids, while a removable cover allows easy access for gap adjustments.

Applications and Use Cases

This assembly is ideal for axial thrust position monitoring in turbines, compressors, and large pumps. By observing the shaft end, it helps detect thrust bearing wear or misalignment early. For example, in a steam turbine application, the 21022-28-10-XXX-02 MOD 17480-122 ensures continuous monitoring of axial movement, reducing unplanned downtime. Its external mounting design enables adjustments without opening the machine case.

Installation and Setup

Mount the enclosure on the machine case using four standard machine screws. The probes install into sleeve/adapter assemblies through two 3/4-in NPT threaded holes. For penetration lengths greater than 305 mm (12 in), additional sleeve support near the probe is required to prevent resonance. The sleeve adjustment range is ±13 mm (±0.5 in). For penetration lengths between 1.0 and 2.0 inches, a counter-bore may be needed to reduce probe side view and rearview effects.

Maintenance and Reliability

Regular inspection of the 21022-28-10-XXX-02 MOD 17480-122 ensures long-term reliability. Check the housing for damage and verify probe gaps periodically. The aluminum alloy housing resists corrosion, while the 304 stainless steel sleeves provide durability. Follow the manufacturer’s manual for detailed maintenance procedures.

FAQ about the 21022-28-10-XXX-02 MOD 17480-122

Q: What is the probe cable length for this assembly?

A: The probe cable length option is 10, which corresponds to 1.0 metre (39 in).

Q: Are the fittings installed when the housing is shipped?

A: No, the fittings option (02) is supplied as a kit and is not installed when the housing is shipped.

Q: What is the weight of the 21022-28-10-XXX-02 MOD 17480-122?

A: The assembly weighs 3.6 kg (8 lb).

Q: What materials are used for the housing and sleeves?

A: The housing is aluminum alloy (sand cast, 0.3% copper free), and the sleeves are fabricated from 304 stainless steel.

Q: How do I order the correct probe penetration length?

A: Order in increments of 0.1 in (2.54 mm) for the 21022 model. For penetration lengths greater than 305 mm (12 in), additional sleeve support is required.

Product Support and Availability

The 21022-28-10-XXX-02 MOD 17480-122 is available from Petro Auto Tech. Contact our team to verify current lifecycle status and availability before ordering. We are ready to assist with your industrial automation needs.