Product Overview

The Bently Nevada 128015-08 is a sophisticated Reciprocating Impulse Velocity Monitor, specifically engineered to provide comprehensive protection for reciprocating compressors and engines. As a critical component of the Bently Nevada 3500 Modular Monitoring System, this module—often identified as the 3500/70M—is designed to detect and analyze the unique vibration signatures generated by reciprocating machinery. Unlike standard vibration monitors that measure continuous RMS velocity, the 128015-08 utilizes advanced Digital Signal Processing (DSP) to capture and analyze transient “impulse” events. These impulses are characteristic of mechanical impacts within the compressor, such as valve openings, piston slap, or crosshead movement.

The Bently Nevada 128015-08 accepts inputs from seismic velocity sensors mounted on the compressor crankcase or crosshead guides. It conditions these signals to extract specific diagnostic parameters, including Pulse Acceleration and Reciprocating Velocity. This capability allows the 128015-08 to identify developing mechanical faults—such as leaking valves, worn rider bands, or loose crossheads—long before they result in catastrophic failure. By integrating this monitor into a machinery protection system, plant operators can transition from reactive maintenance to predictive strategies, ensuring the reliability and availability of critical assets in the oil and gas, petrochemical, and power generation industries. The module’s robust design ensures reliable operation in the harsh, electrically noisy environments typical of industrial compressor stations.