Precautions to use the brake system of a car
At present, the main evaluate standard for the water proof property of joint is based on the IP level. While the property is depend on the figures after IP. That is IPXX. The first X is from 0-6. While the second X is 0-8. Thus the top grade of water proof is IP68.
Solid protection class
0 : non of protect
1: Prevent the solids above 50mm. While it’s about the length of a hand
2: To prevent the 12.5mm solids; The length is about a finger
3: Prevent 2.5mm solid. Equally to a thread or a wire
4: Prevent the entry of solid objects larger than 1.0mm. Almost the same with a wire
5: It can prevent the dust enter and cause damage
6: Entirely prevent the dust
Water proof grade
0: not water proof
1: prevent water drops
2: When the shell is tilted to 15 degrees, water drops will not affect the shell
3: Water or rain has no effect on the shell from a 60-degree corner
4: There is no harm even the liquid splashes onto the shell from any direction
5: Rinse with water without any harm
6: Prevent powerful jet water. Thus it can be used in the cabin
7: It can bear water immersion in a short time
8: Continuous immersion at a certain pressure
The test of the IP68 water proof joints is much more strict then other grades. For example, the IP68 water proof test of Bulgin is that the joint should be under 10 meters’ of water. While it should work more than 2 weeks without any water enters. Besides, it should remain good property under 100 meters deep water for 12 hours.
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