Flange Diaphragm valve is a special form of shut-off valve, appeared in the 20th century, 20 years. Its opening and closing parts is a piece of material made of soft membrane,
The valve body cavity and the valve cover cavity and drive components separated, so called diaphragm valve.
Flange Diaphragm valve features are as follows:
The most prominent feature is the diaphragm to the lower part of the valve body cavity and the upper valve cover cavity separated, so that the diaphragm above the stem, disc and other parts from the media corrosion, eliminating the filler seal structure, and will not produce media leakage The
1, the use of rubber or plastic and other soft seal made of the diaphragm, good sealing. As the diaphragm for the wearing parts, depending on the characteristics of the media and regular replacement.
2, by the diaphragm material restrictions, diaphragm valve for low pressure and temperature is relatively low occasions.
3, diaphragm according to the structure can be divided into: house, DC, cut-off, straight-through, gate and right angle six; connection form is usually flange connection; by driving can be divided into manual, electric and pneumatic Three, of which pneumatic drive is divided into normally open, normally closed and reciprocating three.
4. It is not appropriate to use in pipelines with temperatures above 60 ° C and for transporting organic solvents and strong oxidizing media, and should not be used in higher pressure piping