The meaning of the model designation of a safety valve
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Hello, dear teachers. For safety valve models such as A42Y-150LB, there are codes like 4P6, 6Q8, 11/2G3, 3L4, 2J3, etc., following them. I know that these codes are likely used to indicate the diameter as well. Does any teacher have a chart showing these codes, or could you please explain what they specifically mean? Thank you very much!
Thank you for the sharing above; this is also very useful. However, I still don’t understand what the code at the end means. Please keep helping me out. :)
API 526-2002 Steel Flanged Pressure Relief Valves, Flow Area and Designations
Safety valve: 4P6, 4-inch inlet, 6-inch outlet; the flow channel diameter is denoted by P