What does 10 in Q41F-25-10 mean?
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What does the number 10 in the ball valve code Q41F-25-10 represent? Does it represent the material? If it’s a material, what is it? What does TFQ stand for in TFQ41-25? Thank you so much! This post was last edited by yuhan_xu on 2008-2-17 15:26.]
In Q41F-25-10, the 10 represents the nominal diameter, which refers to a nominal diameter of 10 millimeters； 25 refers to a nominal pressure of 2.5 MPa ； F indicates that the material of the sealing surface is tetrafluoroethylene; the material designation letter is placed after the number 10. If no such letter is indicated, it means ordinary carbon steel. P stands for 304, R stands for 316, and so on. If the original poster checks the notation for valves, it will be clear at a glance. As for TFQ, I don’t seem to have seen it before; is it some rule set by the company itself? Generally, for low-temperature ball valves, D is added before Q, while for high-temperature ball valves, B is added before Q. This post was last edited by Li Yiheng on 2008-2-17 at 15:54.]
One more thing: 41 denotes a flange-through type
In 41, the 4 indicates that the connection type is flange, while 1 indicates that the valve is of the straight-through type; this is explained in the Chemical Process Design Manual (2nd edition).
TFQ? I’ve never heard of it. Let’s check to see if it’s some foreign standard or something established by a company itself
I gave the wrong score; consider it encouragement for the newcomer
In TFQ41-25, does TFQ refer to a fluoroplastic ball valve with a weight of 25 kilograms?
Thank you to everyone above for their help. I went to the design institute today to find out more; T stands for degreasing, F stands for fire resistance, and that 10 is a material code assigned by the design institute itself – the letter C is omitted in front of it. According to the standards, for carbon steel valves with a pressure of 2.5 MPa or higher (inclusive), the code C can be omitted. An additional digit 10 has been added to indicate low-temperature carbon steel LCB. I’ve learned more*, hoping it will be helpful to everyone
TFQ is the valve model (ball valve)