1, the anti shock strength: protective airtight door anti shock strength of 0.3 MPa.

2, net size: 800 x 1600 (width * height).

3, air tightness under pressure: 500 + 20 kPa pressure, pressure relief rate is less than 350 PA | + 20 hours.

Four, product function:

Protective sealing door and airtight door used for coal mine refuge chamber. Outside of the first protective sealing door can withstand the shock wave is not greater than 0.3 MPa, and can prevent toxic gases into the refuge chamber, also has a waterproof, insulation and noise reduction function; second closed door closed to toxic gas barrier.