The vacuum drying oven has the advantages of fast drying speed, less pollution, and no damage to the internal quality of the items to be dried. It can be widely used in food, light industry, chemical industry and other industries for heating and drying at constant temperature.

What is the reason for the vacuum suck-back phenomenon of the lab drying oven? The main reason is the wrong operation when turning off the vacuum pump. The valve should be closed first and then turn off the vacuum pump. If the order is reversed, the water or oil of the vacuum pump will be sucked back due to the influence of vacuum negative pressure. Inexperienced workers may make mistakes.

Once the suck-back occurs, the operator should close the valve in time to prevent the vacuum oven from continuing to suck back, then release the vacuum, open the door to start processing the dried materials and check the pollution. The medium is water, then it is easier to clean than vacuum oil. If it is vacuum oil, the operator must carefully clean it several times. After the pollution is cleaned up, new materials can be put in for drying operations.

In addition, a check valve can also be added between the vacuum pump and the digital vacuum dry oven. When the vacuum pump stops, the check valve will close the valve instantly, so that there will be no vacuum suck-back phenomenon.