43501-01-04-01 Bently Nevada Low Pressure Seal

Bently Nevada 43501-01-04-01 Low Pressure Cable Seal

Product Introduction 43501-01-04-01

The Bently Nevada 43501-01-04-01 Low Pressure Cable Seal offers a practical solution for passing instrumentation cables through a single hole in machine cases or similar barriers. This model supports up to four 95-ohm transducer cables or two 25mm and 50mm DE transducer cables simultaneously. Its molded silicone rubber grommet creates an effective seal that prevents fluid leakage along the cable's outer jacket. The primary application involves sealing lube oil within bearing housings and preventing it from escaping to the external environment.

Technical Specifications 43501-01-04-01

The 43501-01-04-01 features a 1/2-14 NPT thread size on both the high-pressure and low-pressure sides. This standardized threading ensures compatibility with common industrial piping and conduit systems. The assembly measures 35mm (1.4 inches) in overall length when fully tightened, making it suitable for installations with limited space.

The pressure rating of this cable seal reaches 345 kPa (50 psi) across the grommet from the high-pressure to the low-pressure side. Additionally, the seal maintains a rating of 1.0 psi absolute, though practical limitations depend on the cable, probe, and connector used in conjunction with it. The grommet accommodates up to four cables, with one hole fully punched and three holes partially pre-drilled for user customization.

Design Features and Limitations

The sealing mechanism of the Bently Nevada 43501-01-04-01 focuses exclusively on the cable's outer jacket and the seal body itself. Therefore, this device does not seal leaks that may occur through the cable braid, center conductor, or any pinholes or cuts in the cable jacket. Moreover, it cannot prevent fluid migration through the probe or connector assemblies. Users must understand these limitations when selecting this seal for their specific applications.

The seal mounts securely into a hole tapped with either 1/2-NPT or 3/4-NPT pipe threads in the machine casing. External pipe threads on both ends allow mating to the tapped hole and to connecting conduit or housings. This dual-threaded design provides installation flexibility while maintaining a secure mechanical connection.

Installation Guidelines

Proper installation of the 43501-01-04-01 ensures optimal sealing performance and longevity. First, verify that the mounting hole in the machine case has the correct thread specification. Next, apply a small amount of silicone grease to the cable outer jacket before inserting it through the grommet. This practice reduces friction during assembly and helps preserve the grommet's integrity.

Tighten the seal assembly to a torque setting between 18 and 22 ft-lbs. This range provides sufficient compression for an effective seal without causing damage to the silicone grommet or the seal body. Finally, ensure that the cable routing does not place excessive strain on the seal assembly, as this could compromise the sealing performance over time.

Environmental and Mechanical Parameters

The Bently Nevada 43501-01-04-01 operates effectively within standard industrial environments. The silicone rubber grommet exhibits excellent resistance to lubricating oils and maintains its sealing properties across a wide temperature range. The compact 35mm assembled length allows installation in tight spaces where larger seals would not fit.

Packaging List

• 1x Bently Nevada 43501-01-04-01 Low Pressure Cable Seal Assembly (complete with grommet and washers)

• Original manufacturer packaging with product identification

Frequently Asked Questions

Q1: What cables work with the Bently Nevada 43501-01-04-01?
A1: This seal supports up to four 95-ohm transducer cables or up to two 25mm and 50mm DE transducer cables through its multi-cable grommet.

Q2: What is the maximum pressure for the 43501-01-04-01?
A2: The seal handles a differential pressure of 345 kPa (50 psi) across the grommet, with an absolute rating of 1.0 psi limited by connected components.

Q3: Does this seal prevent leaks through damaged cables?
A3: No, the 43501-01-04-01 only seals along the cable's outer jacket. It cannot stop leaks from cable braid damage, center conductor issues, or faulty connectors.

Q4: What thread sizes does the 43501-01-04-01 use?
A4: This model features 1/2-14 NPT threads on both the high-pressure and low-pressure sides for standard industrial compatibility.

Q5: How does the 43501-01-04-01 handle four cables at once?
A5: The grommet has one fully punched hole and three partially pre-drilled holes, allowing users to open only the ones needed for their cable configuration.