卓尔瑞华（北京）科技有限公司

德国AB MDM 7410 7420 7450

微型 耐高温 耐高压焊接式隔膜压力表

Diaphragm Seals
Thread Connection， Flush Membrane
Models MDM 7410 MDM 7420  MDM 7450

      Applications
      Diaphragm seals model series 74.. are used for high pressures and/or aggressive， contaminated or hot media.
      Pressure gauges， pressure switches， pressure transmitters and pressure transducers can be mounted.
      Important information about advantages， applications and features can be found in our model overview 7000 where you will also find an overview of our other chemical seal series.
      Please note especially the explanations about the influences of temperature and other special operating conditions， and the requirement of detailed ordering information resp. inquiries.

      Please use our check list for pressure measuring instruments with chemical seal to ensure the completeness of all required ordering information (for download to find at our website， PDF-Download).
      You can receive the check list in printed version with mail upon request.

      Construction
      The diaphragm is flush welded to the body. The complete measuring system is evacuated， completely filled with a suitable filling liquid and hermetically sealed.

      Do not open any connection of the system!
      Otherwise filling fluid will leak out and the measuring system cannot work properly anymore!

      Standard Configurations

      Process Connection
      MDM 7410: Male thread ?"2) ， 3/4"， 1"， 1?" or 2" BSP
      MDM 7420: Male thread ?"2)， 3/4"2)， 1"， 1?" or 2" NPT
      MDM 7450: Hexagon union nut 1"， 1?"， 1?" or 2" BSP，
                          304 stainless steel (1.4301)

      Body
      Stainless steel 316 L (1.4435)

      Diaphragm
      Stainless steel 316 L (1.4435)， flush welded to the body
      eff. ? diaphragm depends on connection size， see overleaf

      Nominal Pressure
      PN 600 (10.000 lb/sq.in.)， PN 40 for MDM 7450 DN 1?" or 2" BSP

      Instrument Connection 1)
      ?" BSP female resp. ?" BPS-f for certain sizes， see tables overleaf

      Filling Liquid
      Silicone oil

      Pressure Ranges Measuring Instrument
      Pressure gauge: dependent on model and size，
      minimum pressure range and PN see tables overl