According to the needs, consumers can choose different types of valves. Because the valve is the control pipeline medium, if the poor quality of the valve is selected, it is easy to cause the leakage of other media such as water, resulting in house water, resulting in the loss of property. Therefore, it is very important to choose a good quality valve, and pay attention to the following points:
1) When purchasing, visually detect the valve surface should be free of sand holes; Electroplating surface should be uniform luster, should pay attention to whether there is peeling, cracking, burning, bare bottom, peeling, black spots and obvious pitting and other defects; The surface structure of the spray should be fine, smooth and uniform, and there should be no defects such as flow hanging and exposing the bottom. The above defects will directly affect the service life of the valve.
2) The pipe thread of the valve is connected with the pipeline, and there are obvious defects such as dents and broken teeth on the surface of the thread when purchasing, and the power station valve should pay special attention to the effective length of the screw thread and the connector will affect the reliability of the seal, and pay attention to the effective length of the pipe thread when purchasing. Generally, the effective length of cylindrical pipe thread of DN15 is about 10mm.
3) Gate valves and ball valves are generally marked with nominal pressure on their valve bodies or handles, and can be purchased according to their own needs.
4) If the consumer wants to replace the existing gate valve or ball valve, it is necessary to find out its structural length, so as not to be installed after purchase.
5) The pipe thread of the triangle valve has two kinds of internal thread and external thread, and consumers should buy according to their needs; It should also be noted that there are some triangle valves made of zinc alloy on the market at present, the price of the valve is lower than the general price, but it is easy to corrosion and cause fracture, and after a long time, it will rot in the pipeline, resulting in difficult maintenance.
Consumers must choose carefully when buying.
