Pneumatic diaphragm valve

The structure of the diaphragm valve is very different from the general valve. It relies on a soft rubber membrane or plastic membrane to control the fluid movement. Commonly used diaphragm valve materials are divided into cast iron diaphragm valves, cast steel diaphragm valves, automatic diaphragm valves, and industrial diaphragm valves.

Diaphragm valve is equipped with a flexible diaphragm or combined diaphragm in the valve body and valve cover, and its closing part is a compression device connected with the diaphragm. The valve seat can be in the shape of a weir or the wall of the straight flow channel. The advantage of the diaphragm valve is that its operating mechanism is separated from the medium passage, which not only ensures the purity of the working medium, but also prevents the possibility of the medium in the pipeline impacting the working parts of the operating mechanism. Common diaphragm valves are: DM Series Pneumatic Diaphragm Valve.

Own characteristics

(1) The fluid resistance is small.

(2) It can be used for medium containing hard suspended solids; since the medium is only in contact with the valve body and the diaphragm, there is no need for a stuffing box, there is no leakage of the stuffing box, and there is no possibility of corrosion to the valve stem part.

(3) It is suitable for corrosive, viscous and slurry medium.

(4) Can not be used for high pressure occasions.

Diaphragm valves are often used in food and beverage, medical, filling, textile printing and dyeing, foam, air separation, chemical and other fields.

For more information, please feel free to Contact with us.