Regarding valve models
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What do SHZ2 imitating Z41Y-40I and SHZ2 imitating z41Y-40I# mean respectively, and what are the differences between them? I would be very grateful if an expert could help answer this question.
Z41Y-40I denotes a flanged gate valve with a pressure rating of PN4.0; Y indicates stainless steel, and I means high-temperature resistance. As for Z41Y-40I#, it’s not quite clear
Z41Y-40I denotes a Z-type gate valve with a handwheel for operation, 4 flange connections, a visible stem, a wedge-shaped design, and a rigid single gate plate. The secondary seal is made of cemented carbide; the pressure rating is 40 PN4.0MPa, corresponding to a weight class of 40 kilograms. The valve body is made of chromium-molybdenum steel. The prefix “ Imitation” indicates that this valve is modeled after the Z41Y-40I valve, sharing the same overall shape and dimensions, but with some differences in certain structural aspects. I don’t know what SHZ2 and the subsequent # mean
Additional note: z denotes a gate valve, 4 indicates flange connection, 1 refers to a single-plate wedge gate valve with an exposed stem, y means the valve seat sealing surface is made of cemented carbide, 40 represents a nominal pressure of 40 kilograms, and i indicates that the valve body is made of Cr5Mo steel