Description

Configured for cross-talk suppression and signal transmission in machinery monitoring systems, the Bently Nevada 330162-01-45-45-07-07-94-01-02 (330162 Dual Triaxial High-Pressure Feedthrough) provides direct physical/electrical execution. This specialized hardware component establishes a sealed, continuous electrical path for two separate proximity probe channels passing through high-pressure machine casings. The dual triaxial design isolates high-frequency eddy-current signal vectors, enabling uninterrupted rotor dynamics monitoring on pressurized turbine or compressor housings.

Suffix Breakdown & Model Matrix

• 330162: Dual Triaxial High-Pressure Feedthrough Core Platform.
• 01: Armor Option – Without stainless steel armor at the low-pressure end.
• 45: Dimension 1 Length – 4.5 meters of low-pressure side cable length.
• 45: Dimension 2 Length – 4.5 meters of low-pressure side cable length.
• 07: Dimension 3 Length – 0.7 meters of high-pressure side cable length.
• 07: Dimension 4 Length – 0.7 meters of high-pressure side cable length.
• 94: O-Ring Material – Fluorocarbon formulation rated for hydrocarbon, petroleum, and turbine oil vapor exposure.
• 01: High-Pressure Connector – Equipped with female miniature coaxial connector layout.
• 02: Low-Pressure Connector – Equipped with male miniature coaxial connector layout.

Hardware Specifications

Machinery Monitoring and Eddy-Current Probe Scaling

The physical and electrical integration of the triaxial feedthrough maintains a consistent loop impedance necessary for exact eddy-current probe scaling. By restricting electrical attenuation across the high-pressure bulkhead, the assembly supports accurate gap voltage validation (-10 VDC targets) within the external Proximitor circuits. The dual triaxial geometry provides isolated internal shield paths that maintain high levels of cross-talk suppression between concurrent proximity sensor lines. This shielding arrangement prevents magnetic coupling or signal blending between adjacent transducer runs, ensuring pristine vibration data transfer under high-pressure plant processing states.

Frequently Asked Questions

Q: How does liquid contact affect the dual-channel electrical path inside the feedthrough housing?

A: The feedthrough is engineered to isolate pressure, but the internal cable-to-fitting junctions must remain free of liquid water. Moisture ingress inside the internal cable lead zones creates a high-resistance short circuit, dropping the transducer system AC/DC output voltage.

Q: Can the 4.5-meter low-pressure cables be modified or cut down to match specific enclosure layouts?

A: No. Cutting or physically splicing the triaxial leads alters the total loop capacitance and changes factory calibration parameters. This modification disrupts eddy-current probe scaling configurations and generates severe offset errors during gap voltage validation.

Field Installation Guidelines

• Thread Engagement: Ensure a minimum of 5 full threads of engagement when installing the 303 stainless steel fitting body into NPT casing taps.
• Minimum Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 in) across both high-pressure and low-pressure triaxial cable sections during routing.
• O-Ring Inspection: Lubricate the fluorocarbon O-ring with matching turbine oil before insertion; verify that the sealing seat is completely clear of debris or surface pitting.
• Shield Grounding Boundary: Maintain full isolation between the coaxial connector shells and the machine casing ground, directing all shield terminations to the designated monitor common busbar.