31000-16-05-00-035-02-02 | Bently Nevada 8 mm Probe Housing

Introduction to the Bently Nevada 31000-16-05-00-035-02-02

When vibration monitoring equipment must perform in harsh industrial environments, the housing that protects the sensor is just as critical as the sensor itself. The 31000-16-05-00-035-02-02 from Bently Nevada is a 31000 series proximity probe housing engineered to shield a 3300 XL 8 mm probe. This model includes a 0.5 m (20 in) probe cable, two 3/4-14 NPT fittings with one plug, and a 3/4-14 NPT mounting thread. It is built for reliable operation across a wide temperature range, making it a dependable choice for rotating machinery monitoring.

As a maintenance engineer, you need components that withstand vibration, moisture, and temperature extremes. This housing delivers on that need, with a glass-reinforced thermoplastic body and stainless steel hardware that resist corrosion and mechanical stress.

Key Features and Technical Specifications

The 31000-16-05-00-035-02-02 is designed for demanding applications. Its construction and ratings ensure long service life and consistent performance.

• Probe compatibility: Designed for the 3300 XL 8 mm probe, ensuring a precise fit.
• Cable length: 0.5 m (20 in) probe cable, suitable for close-coupled installations.
• Mounting thread: 3/4-14 NPT, a standard industrial connection.
• Fittings: Two 3/4-14 NPT fittings with one plug, offering flexible routing options.
• Housing material: Glass-reinforced Polyphenylene Sulfide (PPS) thermoplastic with conductive fibers for electrostatic dissipation.
• Sleeve and chain: AISI 304 stainless steel for corrosion resistance and strength.
• Outer sleeve and screws: AISI 303 stainless steel for durability.
• O-ring material: Neoprene® for a reliable seal.
• Temperature rating: -51°C to +105°C (-60°F to +221°F), suitable for extreme environments.
• Protection ratings: Type 4X certified by CSA, IP66 verified, and CENELEC EN50014 rated for electrostatic dissipation in hazardous areas.
• Impact strength: Certified by BASEEFA to withstand 4 Joule impacts at -39°C and 115°C; CSA verified 7 Joule impact at ambient temperature.
• Weight: 1.2 kg (2.6 lb) typical.

One distinctive feature is the housing's impact strength. It is certified to withstand two separate 4 Joule impacts at extreme temperatures, which means it can survive accidental tool drops or debris strikes without compromising the probe inside. This is a critical advantage in maintenance environments where physical damage is a common cause of sensor failure.

Applications and Use Cases

This housing is ideal for vibration monitoring on pumps, motors, compressors, and turbines. In these applications, the housing protects the proximity probe from moisture, dust, and physical impact, ensuring accurate readings. For example, in a paper mill where washdowns are frequent, the IP66 rating allows the housing to withstand hose-directed water, keeping the probe operational. Similarly, in a chemical plant with corrosive atmospheres, the stainless steel components and PPS housing resist degradation, extending the life of the monitoring system.

Installation and Setup

Proper installation is essential for reliable operation. The 31000-16-05-00-035-02-02 uses a 3/4-14 NPT mounting thread, which is common in industrial applications. Ensure the mounting surface is clean and free of debris before installation. The two 3/4-14 NPT fittings allow you to route the probe cable through either opening, while the plug seals the unused port. Tighten the fittings to the recommended torque of 29.4 N·m (260 in·lb) for the retaining nut to ensure a secure seal. Verify that the O-rings are properly seated to maintain the IP66 rating.

Maintenance and Reliability

Routine inspection is key to long-term reliability. Periodically check the housing for cracks, loose fittings, or signs of wear on the O-rings. The stainless steel sleeve and screws resist corrosion, but in highly corrosive environments, inspect them more frequently. The housing is designed to seal against water ingress, but it is not intended to withstand internal or external pressure. Therefore, avoid pressurizing the housing beyond atmospheric conditions. If you need pressure testing, contact Bently Nevada's custom design department.

By following a simple maintenance schedule, you can maximize the service life of the housing and the probe it protects. This reduces downtime and replacement costs, making it a cost-effective choice for continuous operation.

Compatibility and Integration

This housing is specifically designed for the 3300 XL 8 mm probe, ensuring a secure fit and optimal performance. It is part of the 31000 series, which is widely used in Bently Nevada vibration monitoring systems. The housing can be integrated with existing 3300 XL monitoring systems, providing a drop-in replacement or upgrade path. The 0.5 m cable length is suitable for many installations, but for longer runs, you may need to consider extension cables (not included).

Common Questions and Troubleshooting

Q: What is the temperature range for this housing?

A: The 31000-16-05-00-035-02-02 is rated for -51°C to +105°C (-60°F to +221°F), making it suitable for extreme cold and heat.

Q: Can this housing be used in hazardous areas?

A: Yes, the housing has a CENELEC EN50014 rating for electrostatic dissipation of plastic materials in hazardous areas. However, always verify compliance with your specific site requirements.

Q: How do I install the probe cable?

A: Route the cable through one of the two 3/4-14 NPT fittings, and use the plug to seal the other opening. Tighten the fittings securely to maintain the IP66 seal.

Q: What is the recommended torque for the retaining nut?

A: The recommended torque is 29.4 N·m (260 in·lb). Over-tightening can damage the housing, while under-tightening may compromise the seal.

Product Support and Availability

The 31000-16-05-00-035-02-02 is available through Petro Auto Tech. Contact our team to confirm current stock and lead times. We are here to help you maintain your vibration monitoring systems with genuine Bently Nevada parts.