What is the difference between J21 and J23? It seems that they are all used interchangeably on the market and are regarded as J21. Are there any conflicts in standards?
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What is the difference between J21 and J23? It seems that they are all used interchangeably on the market and are regarded as J21. Are there any conflicts in standards? In the standard "JB308-2004 valve [In "Door Model Compilation Method", the structural forms are obviously different.
Yes, J23 is obviously a three-way stop valve, but they marked it randomly.
Calm down, don't rush. I can just take a screenshot online and show it to you and you will understand. These are three pictures, they are 1/2/3. Picture 1 shows a half throw. You can ignore it and just look at 2 and 3. 2 is 21 but also 23. 3 is 23 but not 21. Do you understand? For tees, if the flow direction is 180°, there is no difference between 21 and 23. For tees, if the flow direction is 90°, it will be 23, not 21. The valve form is different. It's that simple. Don't worry.
No, the number 3 in your picture is J24 in terms of structure, angular flow channel, right angle.
According to the classification you mentioned, what is the model of this stop valve?
There is no limit to the sea of learning. Do you think style 3 is the same as the screenshot you took? According to your understanding, the tee and the four-way are the same thing?