How do ANSI valves indicate the valve body material in their model numbers?
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Taking the common notation used when purchasing valves these days as an example: Z41Y-150LB DN200. This valve model only indicates that the valve core needs to be surfaced with cemented carbide, but it does not show what material the valve body is made of. How can the material of the valve body be indicated in the model? For example, if I require the valve body material to be 316, how should it be specified? Could any expert help solve this? It would be best to have a detailed coding system for American standard valves; thank you in advance!
This description itself lacks the code for the valve body; if the numbering is done according to JB/T308, then after Z41Y-150LB there should be another code for the valve body. The list of such codes can be found in the attachment. For material 316, the code used should be R, I believe. This numbering system actually has many problems. Currently, no major design institutes use this coding system; instead, they employ their own company-specific coding systems. This standard fails to convey a lot of information about valves, and some details are presented in too general terms. For example, the code “R” only indicates chromium-nickel-molybdenum stainless steel, but it does not specify whether the valve is forged or cast. Codes such as 316, 316L, 316H, 317, 317L all refer to chromium-nickel-molybdenum stainless steel. It is recommended to include not only the code but also a technical description of the material. For instance, one could write the code Z41Y-150LB-R along with a description like: Gate Valve, A351Gr.CF8M, RF, CL150, 316, TRIM, Hardfaced Seats, API600. This makes it easier for valve manufacturers to place orders without any mistakes.
The expert is very satisfied with your answer, but there are still a few questions he would like to ask you: what are the commonly used valve model standards these days? Could you post the widely used American standard valve specifications? ? Thank you!
DN200/150LB/RF/Z41Y-150LB/316/STL./STL./BB OS&Y API600
The purchaser usually provides the spec. datasheet when placing an order, and thus the material information is available；
The valve code is actually used for machining at the factory
I am the buyer; sometimes, in order to specify requirements in more detail, it’s necessary to define various details, but the specific standards aren’t very clear, so I want to read more about different standards.