Technical Specifications

FAQ

1. What is the primary function of the Bently Nevada 43501-01-04-01?

The Bently Nevada 43501-01-04-01 is a low-voltage cable seal designed to provide a reliable sealing point where sensor cables pass through a machine housing, bearing housing, or other equipment enclosure. Its primary purpose is to reduce the possibility of lubricating oil and other process fluids migrating along the outside of the sensor cable and escaping from the machine housing. The multi-cable configuration allows several compatible sensor cables to pass through one sealing assembly, helping reduce the number of individual cable-entry points required on the machine. It is particularly useful in machinery monitoring installations where sensor cables must pass through an oil-filled or lubricated enclosure while maintaining a controlled cable entry.

2. How many cables can the 43501-01-04-01 accommodate?

The 43501-01-04-01 cable grommet and washer assembly can accommodate up to four compatible sensor cables. The configuration includes one punched hole and three partially drilled holes, allowing the installer to prepare the required cable openings according to the actual installation. This arrangement is useful when several sensor cables need to be routed through the same machine housing. Before installation, the cable diameter and construction should be checked to ensure that the cable fits correctly within the sealing grommet. The cable jacket should also be clean and free from cuts, cracks, or other surface damage because the condition of the outer jacket directly affects the quality of the seal.

3. What thread configuration does the 43501-01-04-01 use?

The High Pressure Side Thread Size of the 43501-01-04-01 is 1/2-14 NPT. The corresponding threaded connection must be matched with the appropriate NPT interface on the machine housing or associated installation hardware. Before installation, the threads should be inspected for contamination, mechanical damage, deformation, or excessive wear. Proper thread engagement is important for maintaining mechanical stability and the intended sealing performance. Installation should be performed carefully to avoid cross-threading or excessive tightening. In machinery exposed to continuous vibration, the completed connection should also be checked for mechanical stability so that long-term vibration does not gradually loosen the assembly.

4. What pressure capability is provided by the 43501-01-04-01?

The 43501-01-04-01 is designed for applications involving a differential pressure of up to approximately 345 kPa, or 50 psi, across the sealing assembly under the specified conditions. This pressure capability relates to the sealing arrangement around the cable entry and should not automatically be interpreted as the pressure rating of the complete sensor, cable, connector, or machine enclosure. The condition of the cable jacket is particularly important because cuts, punctures, or other damage can create a path for fluid migration. When the seal is installed in equipment subject to pressure differences, the complete installation should be evaluated as a system, including the machine housing, cable, sensor, connector, and sealing components.

5. What materials are used in the 43501-01-04-01 cable seal?

The 43501-01-04-01 uses a 303 stainless steel housing together with a molded silicone rubber sealing grommet. The stainless steel construction provides mechanical strength and good corrosion resistance for industrial machinery environments, while the silicone rubber grommet provides the flexible sealing interface around the sensor cables. The combination is suitable for applications where the cable entry may be exposed to lubricating oil and elevated operating temperatures. During installation, the sealing surfaces should be kept clean and free from metal particles, excessive oil contamination, and other debris. A clean cable jacket and properly positioned grommet are important for achieving consistent sealing performance.

6. Where is the Bently Nevada 43501-01-04-01 typically used?

The 43501-01-04-01 is typically used in machinery condition-monitoring installations where sensor cables must pass through a machine housing while maintaining a controlled seal. Typical equipment can include turbines, compressors, large motors, pumps, gearboxes, and other rotating machinery that uses proximity or vibration-monitoring sensors. Bearing housings and machine cases may contain lubricating oil, making the cable-entry point an important part of the overall installation. By providing a dedicated multi-cable sealing arrangement, the component helps organize sensor cable routing and reduces the need for multiple separate cable-entry points. This can simplify installation and maintenance while helping protect the machine enclosure from unwanted fluid leakage.

7. Does the 43501-01-04-01 seal the inside of the sensor cable?

The 43501-01-04-01 primarily seals around the outside jacket of the sensor cable at the cable-entry point. It is not intended to provide a separate internal seal between the conductors, shielding, or other internal structures of the cable. Consequently, the cable itself must have an intact outer jacket and suitable construction for the intended operating environment. If the outer jacket has a cut, puncture, crack, or other significant defect, fluid may still migrate through the cable structure regardless of the condition of the external sealing assembly. For critical machinery-monitoring systems, the cable jacket, connector, and sensor assembly should therefore be inspected during installation and routine maintenance.

8. What should be checked when installing the 43501-01-04-01?

Before installing the 43501-01-04-01, confirm that the machine-side connection is compatible with the specified 1/2-14 NPT thread and that the threaded area is clean and undamaged. The required number of sensor cables should then be determined, and each cable should be checked for the correct outer diameter and an undamaged jacket. The sealing grommet should be prepared according to the number of cables being installed, using the available punched and partially drilled cable positions. During assembly, the cables should remain properly positioned while the grommet is compressed sufficiently to establish the intended seal without damaging the cable jackets. After installation, verify that the cable assembly is mechanically secure and that the cables are not subjected to excessive pulling force, sharp bending, abrasion, or continuous mechanical stress. The completed installation should also be monitored for signs of oil leakage or seal movement during initial equipment operation.