Introduction of Fluorine-lined Diaphragm Valve

by:Lianke Valve     2022-07-02
The fluorine-lined diaphragm valve is a special form of shut-off valve that appeared in the 1920s. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts, so it is called a diaphragm valve. The most prominent feature of the fluorine-lined diaphragm valve 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 disc and other parts above the diaphragm are not corroded by the medium, eliminating the need for packing and sealing structure, and no Media leakage will occur. 1. The diaphragm made of soft seals such as rubber or plastic has better sealing performance. Since the diaphragm is a wearing part, it should be replaced regularly according to the characteristics of the medium. 2. Limited by the diaphragm material, the diaphragm valve is suitable for low pressure and relatively low temperature occasions. 3. Diaphragm valves can be divided into six types according to their structural forms: house type, DC type, cut-off type, straight-through type, gate type and right-angle type; the connection form is usually flange connection; according to the driving mode, it can be divided into manual, electric and pneumatic There are three types, among which the pneumatic drive is divided into three types: normally open, normally closed and reciprocating. 4. Generally, it is not suitable to be used in pipelines with temperatures higher than 60 degrees and conveying organic solvents and strong oxidizing media, and it is also not suitable to use diaphragm valves in pipelines with higher pressure. A valve used to open or block airflow. Fluorine-lined diaphragm valve performance leak rate: ≤1.3×10-5Pa. L/S; material: 304, 316L; working medium: air, water, oil; working temperature: fluororubber -30℃~+150℃; principle of fluorine-lined diaphragm valve: use compressed air as power to drive the drive screw to make the valve core Up and down movement while pulling the diaphragm up and down to close and open. Features: compact, simple, small size, beautiful appearance; the switch is guided and moves smoothly; the closing torque is small, the service life is long, ≥300,000 times; the diaphragm compression can be automatically adjusted, the pressure is uniform, and the sealing is reliable; diaphragm mounted The inlet valve core adopts push-in type, which is easy to replace; the main lining material of fluorine-lined diaphragm valve: polyperfluoroethylene FEP (F46)
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