Overview 
 Diaphragm is a special form, with truncation of the valve, the opening and closing pieces by a steel disc with soft materials (rubber and fluorine plastic composite) membrane made of composition, and body cavity with the valve cover cavity separated from the media in order to achieve the purpose of cut pipe. 
 Features 
 1. Compound diaphragm to the lower body cavity with the valve cover cavity separated, and with the formation of current channels, so that the upper diaphragm valve stem, valve and other parts and media in complete isolation, eliminating the need for packing structure, media internal leakage and leakage to avoid; 
 2. Using FEP fluoroplastic composite made with synthetic rubber diaphragm and with fluorine lining valve plastic, can be suitable for a variety of corrosive media. 
 3. As the implementation of the components of the diaphragm, due to frequent opening and closing, easy to produce fatigue fracture, should be considered conditions, media properties, regular replacement. 
 Design 
 Follow GB 12239 / BS5156 standard. 
 Drive 
 Manual, pneumatic (normally open or normally closed), electric.