Bently Nevada CA21128-01-00-03-02 Explosion-proof Velocity Housing

Product Overview

The CA21128-01-00-03-02 explosion-proof velocity housing from Bently Nevada is designed for vibration monitoring applications operating in hazardous industrial environments. The assembly integrates a factory-installed 330500 Velomitor velocity sensor inside a rugged explosion-proof enclosure for continuous machinery condition monitoring in oil refineries, gas compression stations, steam turbines, mining equipment, and petrochemical facilities.

This housing protects the installed velocity transducer against corrosion, hose-directed water, physical impact, and contamination commonly encountered in heavy industrial process areas. The enclosure construction meets demanding environmental protection requirements while maintaining reliable vibration signal transmission under high mechanical stress conditions. Its 1/2-in 14 NPT threaded interface supports standard industrial mounting practices for rotating machinery assets including pumps, motors, fans, compressors, and gearbox assemblies. The CA21128 series is widely deployed in hazardous locations where equipment reliability and predictive maintenance remain critical to reducing unexpected shutdown events.

Ordering Configuration Details

Mechanical Design and Housing Structure

The enclosure uses an explosion-proof mechanical housing structure certified for hazardous industrial locations. The assembly protects internal velocity sensors from moisture intrusion, corrosion, chemical exposure, and accidental mechanical damage during long-term field operation. Bently Nevada specifies the CA21128 series for installations requiring CSA-certified explosion-proof protection in classified environments.

The integrated 330500 Velomitor sensor supports continuous vibration monitoring for rotating equipment health analysis. The 1/2-in NPT explosion-proof cable fitting improves cable sealing integrity while simplifying conduit integration in refinery and turbine installations. The housing design also supports maintenance accessibility during sensor replacement and inspection procedures.

Technical Specifications

Frequently Asked Questions

Does this assembly include the velocity sensor?

Yes. This configuration includes a factory-installed 330500 Velomitor velocity sensor inside the housing assembly.

What type of industrial environments is this housing designed for?

The CA21128 series is intended for hazardous process areas including oil and gas facilities, petrochemical plants, compressor stations, and power generation sites.

Can this housing resist corrosion and washdown exposure?

Yes. The enclosure is designed to resist hose-directed water, corrosion, and physical abuse in harsh industrial environments.

Which thread specification does this version use?

This model uses a 1/2-in 14 NPT mounting thread with an explosion-proof cable exit fitting.

Installation Notes and Engineering Recommendations

Install the housing on rigid machine surfaces with stable vibration transmission characteristics. Avoid mounting locations near unsupported sheet metal structures that may introduce false vibration readings.

Use certified explosion-proof conduit sealing methods that comply with local hazardous-area electrical standards. Improper sealing practices may compromise enclosure protection integrity.

During commissioning, verify vibration signal stability through the monitoring system before placing rotating equipment into continuous operation. Excessive cable tension near the conduit fitting may reduce long-term connector reliability.

For outdoor refinery and offshore installations, apply corrosion-resistant conduit compounds and inspect cable gland sealing surfaces during periodic maintenance shutdowns.