Double-Eccentric Hard-Seated Butterfly Valves
Zhengfa describes a double-offset butterfly construction; request the actual seat arrangement rather than treating the page general material examples as one fixed build.
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Z41X is listed as a rising-stem soft-seated gate valve, distinct from the Z41T wedge gate entry.
Define the isolation duty, medium, pipe size, connections and operating conditions. Ask for the actual offered gate construction, body and sealing materials and operating arrangement with a drawing for the selected valve. Request the current catalogue or drawing for this item, and confirm the offered configuration and supporting documents with the company before specifying an order.