Due to extreme temperature changes, the temperature drops rapidly and crosses large temperature ranges. There will usually be a large amount of vacuum in the tank due to the temperature change, and this vacuum will cause the tank to suddenly sag.
55 gallon closed tank, 1/3 filled with 60 ° C (140 ° F) warm water.
The tank was covered with snow and the temperature in the tank dropped rapidly. The vacuum in the tank is formed, and the tank is at a critical point.
Atmospheric pressure crushes the tanks until they sag.
The temperature drops rapidly across a large range, and a certain amount of vacuum will be generated in the storage tank because of the temperature change
The tank requires a vacuum drain device to relieve the excess vacuum generated in the tank.
The vacuum drain device will drain the excess vacuum, and the depression crisis of the storage tank will be alleviated.