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Model 990.41 Diaphragm Seal with Flange Connection

Brand: WIKA Alexander Wiegand SE & Co. KG
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Diaphragm seals are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, highly viscous, environmentally hazardous or toxic media. 

A diaphragm made of the appropriate material provides for the separation from the medium to be measured. Thus even the most difficult measuring requirements can be met by combining measuring instruments with diaphragm seals.
Features
  • Internal diaphragm with large working volume
  • Special materials available
  • Low temperature error due to large diaphragm diameter (realisation of low measuring ranges possible)
  • Wide temperature application range due to large working volume
  • Integrated flushing connections (optional)
Diaphragm seals are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, highly viscous, environmentally hazardous or toxic media. 

A diaphragm made of the appropriate material provides for the separation from the medium to be measured. Thus even the most difficult measuring requirements can be met by combining measuring instruments with diaphragm seals.
Features
  • Internal diaphragm with large working volume
  • Special materials available
  • Low temperature error due to large diaphragm diameter (realisation of low measuring ranges possible)
  • Wide temperature application range due to large working volume
  • Integrated flushing connections (optional)
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Specifications

Brand

Certifications & Approvals

  • EAC
  • MTSCHS
  • CRN

Process Connection

  • Flange JIS DN 25A, DN 40A, DN 50A
  • Flange ASME B16.5, size 1/2”, 3/4”, 1”, 1-1/2”, 2”, 2-1/2”
  • Flange DIN EN 1092-1, size DN 15, DN 20, DN 25, DN 40, DN 50,

Seal Material

  • FPM, PTFE

Material of Construction

  • PFA (Perfluoroalkoxy) Coating, antistatic
  • PFA (Perfluoroalkoxy) Coating, FDA
  • Duplex 2205 (1.4462)
  • Superduplex (1.4410)
  • 4
  • Titanium Class2, Grade 2, Grade 7, Grade 11
  • Nickel 200, 400
  • Monel 400
  • Inconel 600, 625, 825
  • Hastelloy C-22, C-276
  • Stainless Steel 1.4404 (316L), 1.4539 (904L), 1.4541 (321), 1.4571 (216Ti)
  • ECTFE Coating

NACE / NIST

  • NACE MR-0175, MR-0103
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Applications

  • For assembly (direct assembly, via a cooling element or a capillary) with measuring instruments for low pressures and with differential pressure measuring instruments
  • For aggressive, contaminated or hot media
  • Chemical process industry, petrochemical industry
  • Level measurement, filter monitoring
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