An overview of health level pneumatic diaphragm valve (3)

health pneumatic diaphragm valve is a kind of as a special form of pneumatic valve.
the open-close part is composed of soft film material, and pneumatic valve body cavity cover cavity and drive components separated, therefore calls pneumatic diaphragm valve. Diaphragm is as follows: the characteristics of the lower body cavity and the house of lords from pneumatic valve cover with the most prominent feature of separation membrane, so that in the diaphragm, CD media and other parts corrosion stem tip, and eliminate the need for packaging structure, no leakage of media.
soft rubber or plastic film use seal manufacturing, good sealing. As for diaphragm hole, should be replaced periodically different media characteristics.
by diaphragm material limit, pneumatic diaphragm valve relatively low pressure and high temperature applications.
and diaphragm can be divided into: according to the structure of the building type pneumatic diaphragm valve, once-through pneumatic diaphragm valve, the cut-off type pneumatic diaphragm valve, straight through the diaphragm pneumatic valve, diaphragm and six of door type rectangular diaphragm; Flange connection is usually in the form of ( Fast connection) , the driver can be divided into manual, electric, pneumatic three, including pneumatic drive is divided into normally open, normally closed and reciprocating three.
health pneumatic diaphragm valve to the seat, cut off the pressure elastic film. Under the stem handwheel can drive, mobile, leave the seats or open the pneumatic diaphragm valve diaphragm press close the pneumatic valves on the seat. Such as nitrile rubber ( Silicon diaphragm, epdm, etc. ) , the use of the pneumatic diaphragm valve, applicable to previous levels and drain pipe, temperature of - 吗? ℃, no corrosive gas. Used as a fluorine rubber diaphragm that can be used in the high vacuum system, for - 吗? ℃ temperature range.
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