The outstanding feature of the flange 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, the packing sealing structure is omitted, and there will be no medium leakage.

Structural features and performance parameters of flange diaphragm valve

1. The 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. Limited by diaphragm material, diaphragm valve is suitable for occasions with low pressure and relatively low temperature.

3. Diaphragm valves can be divided into six types according to their structural forms: house type, direct flow 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. Among them, pneumatic drive is divided into normally open, normally closed and reciprocating.

4. Generally, it is not suitable to be used in pipelines with temperature higher than 60 ℃ and conveying organic solvents and strong oxidizing media, nor in pipelines with high pressure

Diaphragm valve is in 1.3 × The valve used to open or block the air flow in the fluid system of 10-5 ~ 2.5x106pa.

Structural features and performance parameters of flange diaphragm valve

Performance parameters of flange diaphragm valve

Leakage rate: ≤ 1.3 × 10-5Pa。 L/S;

Material: 304, 316L;

Working medium: gas, water, oil;

Working temperature: fluororubber - 30 ℃ ~ + 150 ℃;