A look: The variety of floor tiles and their varieties are divided into glazed tiles, non-slip tiles, vitrified tiles, polished tiles, micro-powder bricks, and percolation tiles. There are also many quality levels: sub-optimal, qualified products, and other external products. The quality of the tiles and the quality of the tiles are often observed through careful observation. The surface of the tiles is cracked, uneven corners, and the surface of the tile is bright. However, there are spots or glaze in the glaze layer or in the glaze layer. There is a color difference in the surface color, and generally it can be judged that the quality of the floor tile itself is poor, and it belongs to the inferior product that must be replaced. In addition, the decoration quality of the floor tiles mainly depends on whether the flatness of the entire surface is greater than 2 mm within a range of 2 meters, and whether the seam between the bricks and the bricks is greater than 0.5 mm, and whether the seam straightness exceeds 3 in a length of 5 meters. Millimeters, all those that exceed the above range belong to unsatisfactory quality of decoration.
The second knock: check the floor tiles with or without hollow drill inspection method is usually the use of special small steel hammer or small hammer, small iron bar, around the room lightly hit the four corners of the floor tile and the middle, to detect the floor tiles with no empty drum sound. The sound is crisp, and it is normal. If there is a hollow sound, it means that the quality of the inlay decoration is ineligible and must be promptly eradicated and replaced. During the inspection, marking the empty drum bricks revealed that the bricks were broken and the edges of the tiles were also replaced by signs. Tong Tai, a home inspection division, told reporters that some decoration companies often mislead consumers with "a small amount of empty drums within the allowable range of quality." This is in fact contrary to regulations. Remind owners to pay attention to rights protection.
Three splash: may wish to splash the water to test the floor tiles posted on the balcony, bathroom, kitchen, there is a drainage slope requirements. Check whether there are potholes on the floor of the bathroom, kitchen, and balcony, and whether the water is flowing smoothly or not, splashing a lot of water will know. This “process†can be put to the end. After all the other items have been tested, put the water on the water and spill it on the floor. Wait for a moment. The accumulation of water indicates where the floor tiles are uneven or go down the slope. Did not do enough.
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The check valve is used in the piping system, its main function is to prevent the backflow of the medium, prevent the pump and its driving motor from reversing, as well as the release of the medium in the container.
Check valves can also be used to feed pipes where the pressure may rise to exceed the pressure of the main system. Check valve according to the different material, can be applied to a variety of media pipeline.
The check valve is installed on the pipeline, which becomes one of the fluid components of the complete pipeline. The opening and closing process of the valve disc is affected by the transient flow state of the system in which it is located. In turn, the closing characteristics of the disc have an effect on the fluid flow state.
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