The maintenance methods of circular vacuum drying oven mainly include daily cleaning, vacuum system maintenance, sealing inspection, and maintenance of key components. The following are specific maintenance points:
1. Daily cleaning and inspection
After each use, the residue inside the box should be cleaned in a timely manner to keep the inner wall clean and avoid impurities affecting the vacuum degree and heating effect. When cleaning, you can use a soft damp cloth to wipe the inner wall, and then dry it with a dry cloth. At the same time, regularly check the power lines, control circuits, and safety devices to ensure their safety and reliability.
2. Vacuum system maintenance
The vacuum pump is the core component and requires regular inspection of the oil level and quality. The oil level should be kept at the center of the oil gauge. If the oil quality deteriorates (such as black metal powder), it should be replaced with new oil immediately. It is recommended to change the oil for the first time after about 100 hours of operation for the new pump, and then extend the cycle according to the usage situation. After 2000 hours of operation, the vacuum pump should undergo a comprehensive overhaul, including cleaning of chamber parts, inspection of seals and valve plates, etc. Attention should be paid during operation: close the vacuum valve before stopping pumping, and then stop the pump to prevent backflow of pump oil.
3. Sealing performance maintenance
Regularly clean the sealing ring and door frame with alcohol, and apply a thin layer of high vacuum silicone grease to extend the life of the sealing ring. If the sealing ring is found to be aging or there are gaps in the door frame, the original sealing ring should be replaced in a timely manner. Check if the threaded connection of the valve interface is tightened, and use soap water method to check for leaks.
4. Heating element and temperature sensor
Regularly check whether the heating elements and temperature sensors are working properly to ensure accurate temperature control. If a large temperature error is found, it is necessary to check whether the circulating fan is running to avoid deviation caused by uneven heat conduction.
5. Other precautions
(1) The equipment needs to be effectively grounded to ensure safety.
(2) When not in use for a long time, it should be covered with a dust cover and placed in a dry environment.
(3) When calibrating the temperature, it should be noted that thermal radiation is dominant in a vacuum environment, and the temperature difference between the sensor and the box wall may be large (≥ 10 ℃), which is a normal phenomenon.
By implementing the above maintenance measures, the lifespan of the equipment can be effectively extended and the drying effect can be guaranteed. If you need to further understand the operation details or troubleshooting, you can refer to the relevant guide videos.