Rubber-lined diaphragm valve is a special form of shut-off valve. Its opening and closing part is a diaphragm made of soft material (usually PTFE or EPDM, etc.), which separates the inner cavity of the valve from the inner cavity of the bonnet and the drive components. , So it is called a diaphragm valve. Its most prominent feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve clack and other parts located above the diaphragm are not corroded by the medium, and the packing seal structure is omitted, and no medium is generated. leak.
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