The sand and dust test chamber is suitable for evaluating the tightness (dust tightness) of the test piece. In this test, the test piece is exposed to non-abrasive fine (talc or similar ore), and it is caused by cyclic changes in the temperature of the test piece.
The sand and dust test chamber is suitable for evaluating the tightness (dust tightness) of the test piece. In this test, the specimen is exposed to non-abrasive fine (talc or similar ore), and the effect of the internal and external pressure difference caused by the temperature cycle of the specimen is simulated.
Environment 1. It is suitable for simulating a sheltered environment. This test method is to expose the test piece to a low-concentration dust environment. The production method of this environment is to spray a quantitative amount of dust intermittently and make the dust fall on the test piece by gravity.
Environment 2. It is suitable for simulating outdoor and vehicle conditions. This test method exposes the test piece to turbulence or laminar air containing a certain amount of dust, sand or sand-dust mixture to evaluate the sealing performance of the test piece and the erosion effect of sand and dust.

Test conditions in the circular test
1.1 Test method La: Fine dust without abrasion
Dust concentration: 600±200g/m2/h

1.2 Air pressure conditions in the test cabinet:
Category 1: The air pressure is lower than the ambient air pressure by 2kPa or 5kPa Category 2: The ambient atmospheric pressure

Residence time:
Category 1: 2 hours, Category 2: 4 hours

Relative humidity: less than 25%