Pro Double-Union Ball Valves
Wuyang separately lists its Pro double-union ball-valve construction; request the selected polymer, joint dimensions and seal arrangement.
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The supplier lists a two-piece Van Stone flange arrangement; confirm the actual backing ring, stub and mating-flange details.
Specify the mating pipe or equipment connection, flange dimensions, material and service conditions. Ask for the proposed flange designation and drawing so its drilling, facing and attachment can be checked against the actual joint. Request the current catalogue or drawing for this item, and confirm the offered configuration and supporting documents with the company before specifying an order.