Water pipe valves have been widely used in the air systems of ventilation, air-conditioning and cooling systems in stations, cold stations and sections, and have attracted the attention and love of market users. However, many users are struggling with the selection and installation of the water pipe valve switch . Then what factors should be taken into consideration when selecting the correct water pipe valve switch, and how should the correct choice be made? I do not know how to disassemble the water pipe valve switch during use? Many consumers are often unable to start. Don't worry, if you have this need, you may wish to follow me to learn about the valve switch .
How to choose water pipe valve switch
First, check the water safety of the water valve switch
Not affecting water quality is an important indicator of valve selection.
Second, test the sealing of the water flow of the water pipe valve
Whether the valve plays a sealing role is a basic requirement for the valve. In practical applications, there are many types of seals, such as soft seals, hard seals, valve plate seals, valve body seals, face seals, and wire seals. Regardless of the type of seal used, the seal cannot be affected. In the past, we have used a part of butterfly valve seals. Theoretically speaking, the biggest advantage of this type of butterfly valve is that once the seal apron fails, it can be changed online without disassembling the valve. However, in the actual application of water companies, the advantages of such butterfly valves are difficult to manifest. Therefore, if the apron is replaced online, not only the pipes at both ends of the valve need to be disassembled, but also the water in the pipeline is drained. At the same time, the replacement of the apron can not be sealed test, can not determine the replacement effect. Therefore, in the selection of the valve, we must pay attention to the valve's sealing form, combined with their actual application, check the sealing effect of the valve.
Third, test the authenticity of the water valve
The valve manufacturer must be required to provide true and accurate inspection reports. These inspection reports include:
1, the inspection of raw materials - the original iron in the C, Si, Mn, P, S and other components and coke quality;
2. Inspection of castings - metallographic test, elongation test, strength test, etc.;
3, sealing test - double pump pressure test and multiple switching test;
4. Rubber sanitation and quarantine reports and the health and quarantine report of the coatings. The products produced by companies that provide false inspection reports cannot be used.
Fourth, the reliability of quality
The good quality of valve quality is reflected in the entire process of valve manufacturing.
1, the original iron matching;
2, sand mold manufacturing;
3, cast iron casting;
4, the precision of machining and so on.
Fifth, testing the flexibility of the valve operation of the water pipe
It is important that the valve operates flexibly. The flexibility of operation is reflected not only in the selection of the transmission method but also in the machining accuracy of the components related to the transmission mechanism. For example, in the transmission method of the butterfly valve. There are generally two types of transmission - screw nut type and worm gear type. The general screw-nut type is characterized by two slow heads in the middle of the switch, which is faster in the middle and is better for operation. However, due to the small torque of the screw, it is difficult for the operator to grasp the opening and closing of the valve plate during operation, and it is easy for the valve to close. Still operating twists and breaks the screw. Worm and worm gears are generally easy to close. At the same time, the sealing problem of the valve stem of the gate valve, the matching problem of the rotational speed and the rotational moment of the transmission position of the butterfly valve is the long-standing problem of valve operation. Therefore, which drive method to choose should be based on the situation of each water supply company, and after listening to the opinions of the operators, work closely with the manufacturers so that the selected valves can be operated flexibly and meet the needs of use and work.
Water pipe valve switch how to disassemble
It depends on whether the PVC pipe or metal galvanized pipe. If there is no live connection in the middle, it must be sawn off, and the installation of live pipe is the water supply pipe. The modern decoration pipes are constructed using buried wall. There are three types of pipe classification. The first type is metal pipe, such as Neodymium plastic hot-dip cast iron pipe, copper pipe, stainless steel pipe and so on. The second category is plastic compound metal pipes, such as plastic compound steel pipes and aluminum plastic composite pipes. The third category is plastic pipes, such as PB, PP-R.
How to change the water pipe valve switch
First of all, you need to buy valves of the same specifications and models, otherwise the dimensions are not the same, how can you install it? If the medium is to go drinking water, then you need to pay attention to the purchase of the valve, and some materials are not qualified, is Can't use it.
Next, you need to turn off the main valve, or the upper valve, to turn off the water.
Then, use tools such as pliers to unscrew the two nuts of the valve fixing valve, and shift out the old valve, and then replace the purchased new valve with one. Of course, the nut must be tightened.
Editor's summary: The above is the knowledge of the selection and disassembly method of the water pipe valve switch. I hope to help friends who have this requirement! For more information, please continue to pay attention to our website, follow-up will show more exciting content. You can also purchase your favorite product on Qijia Mall!
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