| 摘要 |
An automatic control valve is provided, including a control chamber bounded by a bonnet; a fluid flow; a rolling diaphragm valve between the control chamber and the fluid flow; and a clamp positioning a first end of the diaphragm; wherein the clamp comprises an extension extending upwardly approximately parallel to the control chamber so that the diaphragm, when extended upwardly due to pressure from the fluid flow, does not pass the extension.
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