Diaphragm valve is a globe 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 and the inner cavity of the valve cover.
Diaphragms are usually made of elastic, corrosion-resistant, impermeable materials such as rubber and plastic. The valve body is mostly made of plastic, glass fiber reinforced plastic, ceramic or metal rubber-lined material. Simple structure, good sealing and anti-corrosion performance, and small fluid resistance. For low pressure, low temperature, highly corrosive and medium containing suspended substances. According to the structure, it can be divided into roof type, cut-off type, gate type and so on. According to the driving mode, it is divided into manual, pneumatic and electric.