Introduction
Failure of the solenoid valve coil can lead to serious problems in the operation of industrial equipment. One such case occurred at a plant in Ukraine, where the coil of a solenoid valve type FIBRO KSF45-R-1-2967-0-2-09-6-002 failed after 1200 hours of operation. This case became the basis for an analysis of the cause of failure.
Overview of the component
Solenoid valves type FIBRO KSF45-R-1-2967-0-2-09-6-002 are used to control the flow of liquid in industrial systems. They consist of a coil, a core and a piston. The solenoid valve coil is subject to high temperatures and stresses, which can cause it to fail.
Signs of failure
Technicians observed signs of solenoid valve coil failure such as:
- Overheating of the coil to a temperature of 120°C
- Voltage increase to 24 V
- Reducing the time of operation of the coil up to 1000 hours
Analysis of the cause of failure
To determine the cause of the failure of the solenoid valve coil, a system analysis was performed, which included:
- Analysis of documentation and historical data
- Inspection of the solenoid valve coil
- Temperature and voltage measurement
Determining the cause of failure
After the analysis, it was determined that the cause of failure of the solenoid valve coil was:
- Insufficient thermal management (40% probability)
- Coil overload due to high voltage (30% probability)
- Insufficient maintenance (20% probability)
- Manufacturing defects (10% probability)
Corrective actions
The following corrective actions were taken to eliminate the cause of the failure of the solenoid valve coil:
- Installation of a thermal management system
- Voltage reduction to nominal 12 V
- Carrying out regular maintenance
List of diagnostic actions
The following list of actions can be used to diagnose the solenoid valve coil:
- Coil temperature measurement
- Coil voltage measurement
- Checking the state of the coil
- Checking the thermal management system
- Maintenance check
- Measuring the coil's operating time
- Checking for signs of failure
- Verification of documentation and historical data
- Inspection of production defects
- Checking the availability of spare parts
- Checking the availability of personal protective equipment
Prevention strategy
To prevent failure of the solenoid valve coil, you can:
- Regular maintenance
- Temperature and voltage monitoring
- Application of the thermal management system
- Voltage reduction to nominal 12 V
Conclusion
Analysis of the cause of failure of the solenoid valve coil indicated that insufficient thermal management, overloading of the coil due to high voltage, and insufficient maintenance were the main causes of failure. To prevent failure of the solenoid valve coil, regular maintenance, temperature and voltage monitoring, application of a thermal management system, and voltage reduction to the nominal 12V are required. For more information on solenoid valve coils and replacement parts, please refer to the UNITEC-D E-Catalog.
Link
DSTU EN 60034-1:2011. Electric machines. Part 1. General requirements for security
DSTU EN 60529:2014. Degrees of protection provided by enclosures (IP code)
ISO 9001:2015. Quality management systems. Requirements
