Freeze Dried process is a method to freeze the dry liquid materials into solid and use the sublimation properties of ice under low temperature and pressure to dehydrate the materials and achieve the purpose of drying. Freeze-drying technology first appeared in the space field, and it is known to all that the space food has a high quality requirement, which is designed to meet the needs of the astronauts in space for the nutrition of fruits and vegetables. Because freeze-drying technology not only let the color, aroma, taste, nutrition of the food itself, but also make food more convenient to carry and transport. With the development of economy, freeze-drying technology has been applied to daily food processing, so the lyophilization process is also called aerospace food technology.
Freeze dried food is to use rapid freezing, vacuum dehydration method of ice, preserved the original color, aroma, taste, nutrition, and the appearance of the original material, the water content of only about 5%, because of the particularity of its craft, by freezing to break the cell wall, so crispy, nutrition, easy absorption
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After the pump is deactivated, all the water in the pump and the water pipe should be drained, and the external mud should be cleaned to prevent freezing of the pump body and the water pipe after freezing.
The impellers, bearings, cups and other parts of the pump must undergo a serious inspection and the worn parts should be replaced. For those who do not need to be replaced, they must wash with gasoline, apply grease, and reinstall them.
For bent or worn pump shafts, they should be repaired and replaced and reinstalled.
For iron castings such as bottom valves and elbows for pumps, the steel rust should be brushed with a wire brush, then painted, and then put in a dry place and then stored in a dry place in the equipment room or storage room. After the belt is unloaded, it is washed, dried and hung in a dry place.
Remove the screws that have been removed and wash them with diesel oil, coat them with oil, reinstall them, or wrap them with plastic wrap and put them away to prevent loss.
After the irrigation is over, the pump that has been used for a year will be put into stock. It is necessary to thoroughly overhaul and maintain the water pump in winter season.