Meaning of the valve code SZ41AF4-B4a
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What does the valve code on the diagram SZ41AF4-B4a in the atmospheric and vacuum distillation material list mean? It seems that Z stands for gate valve, 4 for flanged connection, and 1 for a rigid single-disc gate valve with a visible stem; but what do the other letters mean?
Is there a valve specification sheet? It’s hard to tell; it isn’t formulated according to any standards
There is no valve specification sheet; is there a unified standard for valve codes?
This is not a model that meets national standards; the letters at the beginning are likely assigned by the manufacturer itself. Many manufacturers do this these days. Z stands for gate valve, and 4 means flange – that’s correct