"Honeywell (Honeywell) Valve" DC-style rubber lined diaphragm valve is a special form of cut-off valve, appeared in the 20th century, 20 years. It's opening and closing parts are made of a material with a soft membrane, the cavity body cavity with the valve cover and drive components are separated, it said diaphragm. 
 Diaphragm following features: 
 The most prominent characteristic of the diaphragm to the lower body cavity and the upper chamber separated from the valve cover, so that the stem at the top of the diaphragm, disc media and other parts from corrosion, eliminating the need for packing structure, and no media leaks . 
 1, the use of soft rubber or plastic membrane sealed making, sealing well. As for the vulnerability of the diaphragm should be replaced periodically depending on the media characteristics. 
 2, limited by the diaphragm material, diaphragm valves suitable for relatively low pressure and high temperature applications. 
 3, the diaphragm can be classified according to structure: housing type, DC type, end type, straight through the gate and rectangular Type six; connection usually in the form flange; by drive can be divided into manual, electric and pneumatic three, including a pneumatic drive is divided into normally open, normally closed, and reciprocating three. 
 4. Generally should not be used for temperature higher than 60 degrees and distribution of organic solvents and strong oxidizing media pipeline, and it is not in the use of high pressure pipeline