Diaphragm valve is a special form of shut-off valve, which 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 characteristics of the diaphragm valve are as follows:
The 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 leakage occurs.
1. Diaphragm made of soft seal such as rubber or plastic has good sealing performance. Since the diaphragm is a vulnerable part, it should be replaced regularly according to the characteristics of the medium.
2. Due to the limitation of the diaphragm material, the diaphragm valve is suitable for occasions with low pressure and relatively low temperature.
3. Diaphragm valves can be divided into six types according to the structure: 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, of which pneumatic drives are divided into three types: normally open, normally closed and reciprocating.
4. Generally, it is not suitable to be used in pipelines where the temperature is higher than 60 degrees and transporting organic solvents and strong oxidizing media, and it is not suitable to use pneumatic diaphragm valves in higher pressure pipelines.
EG41J flange rubber-lined diaphragm valve, EG41J-10, EG41J-6 type British standard rubber-lined valve is used to change the passage section and the flow direction of the medium, with diversion, cut-off, adjustment, throttling, check, split or overflow And other functions. Valves can be used to control the flow of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals, and radioactive fluids.
