Product Overview

The Bently Nevada 21000-00-00-00-250-03-02 is a specialized external mounting assembly designed to facilitate the installation of proximity probes on industrial rotating machinery. This housing serves as a robust interface between the machine casing and the proximity transducer, providing an environmentally sealed enclosure that protects the sensor from harsh industrial conditions. It is an essential component of Turbine Supervisory Instrumentation (TSI), supporting the precise monitoring of shaft vibration, axial position, and rotational speed.

This particular configuration features a 25.0-inch sleeve length, engineered for applications requiring deep reach into large machine housings or bearing pedestals. By utilizing this assembly, maintenance personnel can adjust or replace probes externally, ensuring maximum machine uptime and simplified calibration without the need for internal casing access.

Operational Characteristics and Protection

The 21000 series housing is built to maintain measurement integrity in environments where high-fidelity vibration data is critical for asset protection.

• Environmental Isolation: The assembly includes a threaded dome cover and high-performance O-ring seals to protect the probe and cable connections from moisture, oil splashes, and chemical contaminants.

• Mechanical Stability: The precision-machined 25.0-inch sleeve ensures the proximity probe remains rigid and accurately positioned relative to the target shaft, preventing signal artifacts caused by probe vibration.

• Simplified Maintenance: The external mounting design allows for "on-the-fly" gap adjustments of the proximity probe, facilitating the maintenance of the linear electrical range required for API 670 compliant monitoring systems.

• Ruggedized Conduit Interface: Features standard NPT threaded ports to accommodate flexible conduits, protecting the transducer lead-in cable from mechanical abrasion and accidental severing.

• High-Precision Integration: Designed to work seamlessly with the 3300 XL 8mm proximity system, supporting advanced signal conditioning and real-time monitoring of amplitude, frequency, and phase.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 21000-00-00-00-250-03-02

• Component Type: Proximity Probe Housing Assembly

• Sleeve Length: 25.0 Inches (635 mm)

• Housing Material: Precision-machined Aluminum (Standard)

• Mounting Configuration: External Casing Mount

• System Series: 21000 / 3300 XL Compatible

• Compliance: API 670 Standard for Machinery Protection

• Net Weight: 0.06 kg (Configuration dependent)

• Country of Origin: USA

Industrial Application

The 21000-00-00-00-250-03-02 is a vital component in predictive maintenance strategies across heavy industries. Its long sleeve configuration makes it particularly suited for:

• Large-scale steam and gas turbines in power generation facilities.

• High-capacity centrifugal compressors in oil and gas refineries.

• Deep-casing industrial fans and blowers.

• Multi-stage boiler feed pumps.