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The diaphragm valve is a shut-off valve that uses a diaphragm as an opening and closing member to close the flow channel, cut off the fluid, and separate the inner cavity of the valve body from the inner cavity of the valve cover. The diaphragm is commonly made of elastic, corrosion-resistant and non-permeable materials such as rubber and plastic. The valve body is mostly made of plastic, fiberglass, ceramic or metal rubber lining materials. Simple structure, good sealing and anti-corrosion performance, and low fluid resistance. Used for low pressure, low temperature, strong corrosiveness and medium containing suspended substances. According to the structure form, there are roof type, cut-off type, gate type, etc. According to the driving mode, there are manual, pneumatic and electric.
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