Stone wear testing machine
First, the scope of application:
This test machine is used to test the wear resistance of the pedal wear when using various stones as flooring or other similar applications. Its performance is in line with GB/T 19766-2005 standard.
Second, the test requirements:
There are four samples in each group. length. , width is 50m
m±0.5mm, thickness 15mm-55mm, the edge of the sample to be worn surface should be rounded to a radius of about 0.8mm.
When testing, the test piece shall be tested after being cooled to room temperature in a drier in an electric oven at a temperature of 105 °C ± 2 °C.
Third, the test method:
1. The quality of the drying test is accurate to 0.02g, and then placed in the abrasion testing machine to meet the requirements of GB/T2479-1996. The particle size is 0.25mm white corundum as the abrasive. After grinding 225 rpm on the grinding disc, take out the sample. Brush the dust and weigh it to 0.02g.
2. Place the sample in water for 1 h, remove it and dry it with a damp cloth to weigh it. Calculate the bulk density according to the provisions of GB/T 9966.3-2001. Since the humidity affects the grinding effect, for example, the sample has a higher grinding rate when the humidity is high, it is recommended that the test be carried out at a relative humidity (30-40)%.
Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.zjthermalrelay.com