The new AFRISO MD 11 diaphragm seal, plastic version, can be used for pressure measurement in conjunction with a Bourdon tube pressure gauge and for switching tasks in conjunction with a pressure switch, for example, in installations with waste water, fertilisers, corrosive media and a wide variety of chemicals.
Chemical seals prevent direct contact of the measured medium with the measuring instrument. Depending on the application, PVC, PP or PVDF process connections (connection threads G ½ or G¼) and media connections (connection threads G ½ or G¼, PP GF 30) are possible. The MD 11 chemical seals feature TFM-coated, internal EPDM diaphragms with a very thermal and chemical resistance and elasticity. Glycerine (FM 03) is used as pressure transmission liquid. At nominal pressure PN 10, the pressure ranges cover 0/1 bar to 0/10 bar. Depending on the process connection, the operating temperature ranges are 0 to 60 °C (PVC), -10 to 80 °C (PP) and -20 to 100 °C (PVDF). Other process connections are optionally available. MD 11 is an excellent solution for systems with polluted waste water and for outdoor applications in rough conditions requiring high resistance to atmospheric conditions and ozone.