Air permeability tester

Place the pre-treated sample between the upper and lower test chambers, clamp, first vacuum the low pressure chamber (lower chamber), then vacuum the whole system. When the specified vacuum is reached, close the test lower chamber. Fill the high pressure chamber (upper chamber) with a certain pressure of test gas, and ensure that a constant pressure difference (adjustable) is formed on both sides of the sample, so that the gas will be under the action of the differential pressure gradient from the high pressure side to the low pressure side. Infiltration, through the monitoring of the internal pressure on the low pressure side, the barrier parameters of the test sample are obtained.