21000-28-05-20-037-04-02 Bently Nevada Housing Assembly

Product Introduction

The Bently Nevada 21000-28-05-20-037-04-02 is a complete proximity probe housing assembly designed for permanent machine monitoring. This specific configuration includes a 3300 XL 8 mm probe with a 0.5-meter cable. Its aluminum body with a 304 stainless steel sleeve ensures durability in harsh industrial environments. Additionally, this model meets CSA Type 4 enclosure standards for reliable operation in explosive atmospheres.

Technical Specifications

This section details the core technical parameters of the 21000 assembly.

• Probe Option: 3300 XL 8 mm probe with connector (selectable hazardous area approvals)

• Probe Cable Length: 0.5 m (20 in)

• Standoff Adapter: 2 inches

• Probe Penetration: 3.7 inches

• Fitting Option: One 3/4-14 NPT plug only

• Mounting Thread: 3/4-14 NPT (mandatory as standoff adapter is not 00)

• Material: Aluminum body with 304 stainless steel sleeve

• Maximum Dimension (C+D): 13.5 in (34.3 mm) with a non-visible probe

• Weight: 1.1 kg (2.4 lb) typical without fittings

Furthermore, this Bently Nevada housing supports reverse mount proximity probes. It also includes threaded ports for straightforward conduit connections. Meanwhile, the probe sleeve length is selectable to fit various installation depths.

Mechanical and Environmental Ratings

The 21000-28-05-20-037-04-02 offers robust performance under extreme conditions.

• Temperature Rating T5: -50°C to +40°C

• Temperature Rating T4: -50°C to +80°C

• Enclosure Type: CSA Type 4 (weather-resistant)

• Hazardous Area Approvals:

  • Class I, Divisions 1 & 2, Groups C & D

  • Class II, Divisions 1 & 2, Groups E, F, & G

  • Class III

• Circuit Rating: Non-incendive when connected per drawing 140979

Specifically, the housing is fully compliant with the American Petroleum Institute (API) 670 Standard. This compliance makes it ideal for critical turbomachinery like compressors and turbines. For intrinsically safe applications, you can order probes with this housing. Moreover, the 304 stainless steel sleeve provides superior corrosion resistance.

Installation Guidelines

Proper installation is crucial for the Bently Nevada 21000 assembly.

First, verify the mounting thread is 3/4-14 NPT to match your equipment. Next, ensure the standoff adapter is set to 2 inches for the correct gap. The probe penetration should be precisely adjusted to 3.7 inches.

First, screw the probe sleeve into the body securely. Then, install the O-rings to maintain the seal. After that, attach the dome cover over the probe. Finally, connect the conduit to the threaded port. Remember to use the included thread seal to prevent leaks. Consequently, this will ensure a stable and accurate measurement.

Packaging and Delivery

Each Bently Nevada 21000-28-05-20-037-04-02 unit is shipped brand new in factory packaging. The shipment includes the complete housing assembly with the pre-installed probe. It also contains the necessary O-rings for sealing. In addition, the package includes the mounting thread seal. Please note, optional conduit fittings are not included in this specific configuration.

We ship all orders via reliable couriers. Delivery is handled through FedEx, UPS, or DHL. These expedited shipping methods ensure you receive your parts quickly and safely.

Frequently Asked Questions (FAQ)

1. Is the Bently Nevada 21000 housing suitable for offshore platforms?
Yes, the 304 stainless steel sleeve offers excellent corrosion resistance. Its CSA Type 4 enclosure also makes it suitable for offshore applications.

2. Does this assembly include the proximity probe?
Yes, the 21000-28-05-20-037-04-02 includes a 3300 XL 8 mm reverse mount probe with a 0.5-meter cable.

3. Can this housing be used in a Class I, Division 1 area?
Absolutely. This 21000 assembly is CSA certified for Class I, Divisions 1 and 2, making it explosion-proof.

4. What is the total length of the assembly?
The maximum combined dimension from the mounting surface to the probe tip is 13.5 inches (34.3 mm).

5. Is this the same as the CA21000 housing?
The CA21000 is specifically for North American end-users. The standard 21000 model (like this one) is for all other countries.