Working Principle

When testing, the empty cans will be transferred to the testing position on the turn table, then its open-en is sealed up by the sealing disk and filled with air pressure. The precise pressure sensor will read the first  value. After the pressure holding time, the second value will be read. These two values will be analyzed by system, and the over-value can will be rejected as defective cans. There is independent testing circulation on the testing position to avoid interference by airflow of each position which will affect the testing precision.