Introduction
Ukrainian industrial enterprises face a critical need for updating technological processes. Most pumps, compressors and fans in Ukrainian plants are in operation for over 25-30 years. Old equipment is characterized by high energy consumption and absence of real-time data. Market conditions require compliance with European energy efficiency standards according to EU directives and national regulations of Ukraine. Modernization of diagnostic systems is a priority task to prevent emergency shutdowns.
Common objection "but the old system is still working" ignores hidden costs. Preventive maintenance instead of reacting to failures reduces maintenance costs by 30-40%. Implementation of modern vibration and pressure sensors allows transition from reactive maintenance to predictive maintenance strategy. This is critical for ensuring production continuity in metallurgy, mining industry and chemical industry.
Evaluation of obsolete equipment
Before starting the modernization, the engineering service must conduct a full audit of the existing units. Mechanical wear, foundation condition, quality of lubricating materials and presence of electrical interference on the site are evaluated. Special attention is paid to the locations for future measuring instruments.
| Evaluation Criterion | System status old | Target indicator (ISO / EN) | Method of inspection |
|---|---|---|---|
| Vibration level | 7.1 mm/s (Class D) | < 2.8 mm/s (Class B, ISO 10816-3) | Portable vibrometer |
| Bearing temperature | 85 °C (vibration) | Stable < 70 °C | Thermal imaging inspection |
| Lubricant quality (filtration) | Lack of cleanliness control | ISO 4406 (Class 16/14/11) | Laboratory analysis of samples |
| Integrity of the filter housing | Risk of damage due to water hammer | Working pressure up to 410 bar (e.g. HYDAC 0160 RS 125 W) | Hydraulic Testing |
Modern Alternatives and Technological Leap
Replacement of mechanical pressure gauges and obsolete relays with digital sensors with IO-Link or 4-20 mA interfaces transforms the approach to data collection. For example, integration of modern filter elements and pressure monitoring sensors, such as components of the HYDAC 0160 RS 125 W series, ensures continuous monitoring of the condition of the working medium in hydraulic and lubrication systems.
| Technological parameter | Outdated technology (1980s-1990s) | Modern solution (UNITEC-D catalog) |
|---|---|---|
| Pressure Measurement Accuracy | ± 2.5% (mechanical pressure gauge) | ± 0.25% (piezoresistive sensor) |
| Emergency Response Time | Manual detection by operator (hours) | Instantaneous response (milliseconds) |
| Data transmission | Missing (local indication) | SCADA / PLC via Profibus / IO-Link |
| Mean Time Between Failures (MTBF) | 15 000 hours | 100 000 hours (according to ISO 9001) |
Calculation of investment return (ROI)
Financial justification of modernization is based on real indicators of Ukrainian enterprises. Let us consider modernization of a line with 5 large pump units with a total power of 500 kW.
- Cost of equipment and installation (including sensors, controllers and HYDAC components): 18 000 EUR.
- Average cost of downtime for the enterprise: 3 500 EUR per hour.
- Annual downtime due to bearing and hydraulic failures before modernization: 32 hours (total loss of 112 000 EUR).
- Energy saving due to optimization of operating modes: 5% of total consumption (approximately 8,760 kW·h per unit per year, or 43,800 kW·h in total).
At an industrial electricity cost of 0.12 EUR/kW·h, the annual energy saving amounts to 5 256 EUR. The reduction in losses from downtime provides an annual saving of 70 000 EUR. The total annual economic benefit amounts to 75 256 EUR.
Formula for calculating the payback period (Payback Period):
PP = (Capital costs / Annual savings) × 12 months
PP = (18 000 / 75 256) × 12 = 2.8 months.
Implementation Roadmap
For minimization of impact on the production process, implementation is carried out according to a clear plan:
- Planning stage (Weeks 1-2): Audit of existing equipment, preparation of project documentation according to DSTU EN standards, coordination of equipment shutdown windows.
- Supply Stage (Weeks 3-4): Order fulfillment through UNITEC-D GmbH (supply of original components, including hydraulic filters and sensors).
- Stage of installation (Week 5): Mechanical installation of new adapters, mounting of vibration and pressure sensors during scheduled maintenance.
- Startup stage (Week 6): PLC system integration, threshold value setup, test run and calibration.
Technical Challenges and Ways to Resolve Them
Modernization of outdated equipment is accompanied by typical engineering problems:
- Misalignment of connection sizes: Use of adapters and flanges according to DIN and EN standards, made to order.
- Electromagnetic Interference (EMC): Use of shielded cables and grounding in accordance with the requirements EN 61000 for protection of 4-20 mA sensor signals.
- Vibrational loads on cable routes: Use of flexible metal conduits and rigid brackets made of stainless steel to prevent cable breaks.
Practical example: Modernization of a cement plant pumping station
At the enterprise in Khmelnytskyi region, slurry pumps with high vibration levels were in operation. Before modernization, the mean time between failures (MTBF) was only 2 100 hours. Due to uncontrolled oil contamination, bearing units frequently failed.
Results after implementation:
- A vibration monitoring system has been installed and a modern filtration line with HYDAC 0160 RS 125 W elements.
- MTBF increased to 8 500 hours (+304%).
- Vibration level reduced from 8.2 mm/s to 1.9 mm/s (according to ISO 10816).
- All emergency stops of the line have been completely eliminated during the first year of operation.
Startup and validation
After completion of the installation works, tests are carried out according to standard ISO 13373 (machine condition monitoring by vibration characteristics). The functionality of the emergency signals is checked by forced simulation of pressure deviations. The conformity certificate and test protocol are prepared for the company's technical supervision.
Conclusion
Modernization of rotor equipment monitoring systems is an economically justified investment with a payback period of less than 3 months. The use of certified European components guarantees reliability and compliance with safety standards. UNITEC-D GmbH supplies the full range of equipment for modernization of industrial enterprises in Ukraine. Please browse the assortment in UNITEC-D E-Catalog.
Normative basis and references
- ISO 10816-3: Mechanical vibration. Evaluation of machine vibration by measurements on non-considered parts.
- ISO 4406: Hydraulic fluid for ships. Working fluids. Method of coding the level of solid particle cleanliness.
- EN 60204-1: Machine Safety. Electrical Equipment of Industrial Machines.
- Ecodesign Directive 2009/125/EC.
