Product Overview

The Bently Nevada 31000-28-05-15-030-00-02 stands as a premier solution for external proximity probe mounting in high-stakes industrial environments. Unlike standard aluminum variants, the 31000 series utilizes high-grade stainless steel construction to provide maximum survivability in corrosive, offshore, or high-moisture settings. This housing assembly enables precise radial vibration and axial position monitoring of critical rotating machinery, such as gas turbines and large scale pumps, without requiring a machine teardown for probe access. By housing the proximity probe externally, it facilitates real-time gap adjustments while the asset is operational, ensuring consistent data flow to the Bently Nevada 3500 Machinery Protection System and preventing catastrophic equipment failure through early detection of mechanical instability.

Suffix Configuration Analysis

31000 - Stainless Steel Housing Series

This model represents the ruggedized stainless steel version of the proximity probe housing, engineered for maximum chemical and environmental resistance.

-28-05-15 - Dimensional and Probe Selection

The "-28" specifies a 2.8-inch unthreaded length for the sleeve. The "-05" and "-15" define the internal probe diameter compatibility and the mounting thread pitch, ensuring a rigid, vibration-free interface with the machine casing.

-030 - Total Sleeve Length

This suffix indicates a total sleeve length of 3.0 inches. Correct selection of this length ensures the probe tip is positioned accurately within the linear range of the target shaft's movement.

-00-02 - Approvals and Conduit Ports

The "-00" option designates standard non-hazardous or general-purpose area usage (though the physical build remains explosion-proof), and the "-02" confirms the inclusion of a 3/4-14 NPT conduit entry port for industrial wiring.

Critical Technical Specifications

On-Site Deployment Guide

Achieving peak performance requires careful attention to the "Gap Voltage" during installation. Technicians must feed the probe through the sleeve and adjust the mounting until the Proximitor Sensor output reads -10.0 Vdc, indicating the center of the probe’s linear measurement range. Ensure the stainless steel threads are lubricated with a nickel-based anti-seize compound to prevent cold-welding (galling) of the housing to the machine case. All conduit connections must remain watertight to protect the internal probe lead from oil ingress, which can cause signal impedance shifts and false vibration readings.

Superior Engineering Performance

The 31000-28-05-15-030-00-02 provides an impenetrable barrier against the harsh realities of the plant floor. Its heavy-walled stainless steel design dampens high-frequency mechanical resonance that might otherwise distort the probe's vibration data. This stability is essential when integrating with Distributed Control Systems (DCS) like Honeywell Experion PKS, as it ensures that "Alarm" and "Danger" setpoints are triggered by actual shaft movement rather than housing vibration. Its immunity to salt spray and corrosive process gases makes it the definitive choice for offshore platforms and chemical processing facilities.

Ordering info

• One (1) Brand New Bently Nevada 31000 Series Stainless Steel Housing.

• One (1) Precision-machined internal probe sleeve.

• High-temperature VITON seal kit for moisture protection.

• Factory inspection and quality assurance documentation.

• Threaded adjustment and locking nuts.

Global Logistics & Fulfillment

Delivery time: 2-7 days when payment finish via DHL/FEDEX/UPS. Our logistics team utilizes heavy-duty, moisture-barrier industrial packaging to protect the stainless steel finish and precision threads. Each shipment is fully insured and packed in reinforced crates to withstand the rigors of international air and sea freight.

Maintenance & Setup FAQs

Q1: Why choose the 31000 series over the 21000 series?

A1: The 31000 is constructed from stainless steel, whereas the 21000 is aluminum. Use the 31000 in environments where hydrogen sulfide (H2S), salt air, or caustic chemicals would degrade aluminum housing over time.

Q2: Can I adjust the probe depth while the machine is running?

A2: Yes. The external housing design allows you to loosen the locking nut and rotate the sleeve to adjust the probe gap without stopping the machine, provided you are monitoring the voltage output simultaneously.

Q3: What happens if the sleeve length (-030) is too short?

A3: If the sleeve is too short, the probe may not reach its linear range before the housing bottom outs. Always calculate your casing thickness plus the required standoff distance before ordering.

Q4: Is the conduit entry compatible with metric fittings?

A4: This model features a 3/4-14 NPT entry. If your facility uses metric (M20) cabling, you will require a certified NPT-to-Metric thread adapter to maintain the housing's environmental seal.