Rubber Diaphragm Valve

Rubber Diaphragm Valve

Size Range: DN32~DN250
Class: PN16/150LB
Material: Cast Iron, WCB, Stainless Steel;
Lined Material: Rubber
Flange Dimension: ASME B 16.5, BS 12627

What is Rubber Lined Diaphragm Valve

Rubber lined diaphragm valve is a special type of block valve. The diaphragm made of EPDM rubber material is used to separate the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts. The inner cavity of the lower valve body is separated from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are free from medium corrosion, and the packing sealing structure is omitted, and no medium leakage occurs, The flow passage of the valve body is designed with full rubber lining to avoid the corrosion of the valve body by the working medium and increase the service life of the valve. 

Rubber lined diaphragm valve is specially used to control non corrosive or general corrosive media. The surface of valve body and inner cavity is unlined or covered with various kinds of optional rubber. It is suitable for different working temperatures and fluid pipelines.


Rubber Diaphragm Valve Features

1. The opening and closing parts of elastic seal ensure no internal leakage;
2. The streamline flow channel makes the pressure loss small;
3. There is no stuffing box, so there is no leakage;
4. The valve body and the cover are separated by the middle diaphragm, so that the valve cover and the stem parts above the diaphragm are not eroded by the medium;
5. The diaphragm can be replaced and the maintenance cost is low;
6. The diversity of lining materials, can be applied to a variety of media, and has good corrosion resistance.