Bently Nevada 3500/45 Differential Expansion/Axial Position Monitor

Function Features

• Dual-Function Pair Programming: The four channels are programmed in pairs, with channels 1 – 2 and channels 3 – 4 capable of undertaking different monitoring tasks. It can realize functions such as axial position, standard/non-standard single-slope differential expansion, and case expansion. Only channels 3 – 4 can perform case expansion monitoring, which flexibly meets the multi-parameter monitoring needs of complex equipment.
• Multi-Sensor Compatibility: It supports input signals from multiple common industrial transducers. This compatibility enables it to adapt to different monitoring schemes of various rotating machinery, eliminating the need for additional signal conversion modules and reducing system configuration complexity.
• Precise and Flexible Alarm Settings: Users can set multiple programmable alarm thresholds, and the alarm values can be adjusted within the range of 0 – 100% of the full-scale measurement value. It also supports single or dual proportional value danger settings. When monitored parameters exceed the threshold, it triggers alarms immediately to prevent the expansion of equipment faults.
• Seamless System Integration: It adopts Bently Nevada data highway and supports Modbus/TCP protocol. It can be seamlessly integrated with the 3500 series rack and upper-level DCS or ERP systems. It realizes centralized management and remote monitoring of data and provides data support for overall production scheduling and equipment health analysis.
• Hot-Swappable Modular Design: It adopts a modular structure suitable for 3500 series rack installation and supports hot-swapping. Maintenance personnel can replace the module without shutting down the entire system, which simplifies daily maintenance and expansion operations and reduces production losses caused by maintenance.
• Strong Anti-Interference Capability: The internal circuit is integrated with an anti-interference design, which can effectively resist electromagnetic interference in harsh industrial environments. It ensures the accuracy and stability of monitoring data even when working together with high-power electrical equipment.

Application Scenarios

• Power Industry Steam Turbines: It is widely used in coal-fired and gas-fired power plants to monitor the axial position and differential expansion of steam turbine rotors. It promptly alarms when parameters are abnormal, preventing collisions between rotors and stators. The monitored data is transmitted to the DCS system to realize centralized control of power generation equipment.
• Petrochemical Compressors: In refineries and LNG receiving stations, it monitors the axial position and differential expansion of centrifugal compressors. It integrates signals from multiple compressors and transmits data to the enterprise’s management system through communication protocols, optimizing the allocation of maintenance resources and reducing the risk of unplanned shutdowns of production lines.
• Metallurgical Industry Rolling Mills: It monitors the axial position of rolling mill equipment in the metallurgical industry. It helps operators adjust equipment parameters in a timely manner to avoid failures caused by abnormal axial displacement. Historical monitoring data can also be used to analyze equipment wear trends and guide the replacement of vulnerable parts.
• Aerospace Engines: It is applied to monitor the axial position of aircraft engines. It ensures that the key rotating parts of the engines operate within the safe parameter range, provides data support for engine state diagnosis, and enhances the safety of aircraft operation.
• Mining and Water Treatment Pumps: In mining sites and water treatment plants, it monitors the axial displacement and differential expansion of high-load pumps. It prevents equipment damage caused by long-term wear and tear and ensures the continuity of mining operations and water treatment processes.