Root Cause Analysis of VFD-Induced Bearing Currents: Shaft Voltage, EDM Damage and Mitigation Strategies
A damaged bearing on a VFD controlled motor shows EDM marks and elevated temperature. The root cause is the lack of connection to…
Technical Blog
In-depth technical analyses of industrial spare parts, MRO innovations, and engineering insights — powered by AI and reviewed by our experts.
A Guide to Identifying and Troubleshooting Control Valve Oscillations and Rapid Rollback
This guide provides technical support for identifying and resolving control valve wobble and rollback problems. It is used for industrial installations in Ukraine.
Compliance and Safety in MRO Operations: EN 1090/ISO 3834 Welding Standards for Structural Steel Repairs
EN 1090 and ISO 3834 standards are essential for MRO compliance, particularly in the aerospace and energy sectors. These standards define…
Troubleshooting and oscillation of control valves: positioner adjustment, actuator sizing, friction diagnosis and process interaction analysis
1. Problem Description & Scope This guide covers control valve malfunctions manifested as hunting (periodic position fluctuations) or oscillation (continuous, uncontrolled movement). These symptoms lead…
Fan and Blower Maintenance: Balancing, Belt Tensioning, Bearing Lubrication, and Vibration Limits
Scope & Purpose This guide provides a field-ready procedure for the maintenance of fans and blowers used in industrial applications. It covers critical tasks such…
ATEX: Zones, categories and marking of equipment in explosive environments
ATEX certification ensures equipment safety in explosive environments. United-D GmbH provides components that meet the requirements for industrial installations in Ukraine.
Use of Festo 013681 Components in Paper and Carton Making: MRO Solutions for Safety and Efficiency
The Festo 013681 is an essential component in paper mills for controlling the flow of fluids. Efficient management of spare components and…
Diagnostic Guide: Slow or Inconsistent Pneumatic Cylinder Operation
This guide presents a systematic diagnostic approach to troubleshooting slow or inconsistent operation in pneumatic cylinders. Diagnosis is based on pressure, seals,…
Electric crane support: inspection of the hydraulic gearbox, measuring the brake disc and checking the tightness of the chain
A hands-on guide to electric crane maintenance, including hydraulic gearbox inspection, brake disc measurements and link tension checks. Performing the procedure ensures safety, efficiency and…
O-ring Material Selection: NBR, FKM, EPDM, FFKM – Chemical Compatibility and Temperature Ranges
This in-depth technical article from UNITEC-D GmbH covers the critical material selection of O-rings (NBR, FKM, EPDM, FFKM) based on chemical compatibility and temperature ranges. It…