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Model 990.28 Flanged Process Connection Diaphragm Seal

Brand: WIKA Instruments Ltd.
Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal effects the separation of the instrument and the medium.
Features
  • Compact cell-type
  • Intermediate flange with flush diaphragm
  • Common standards and nominal widths available
  • Wide variety of different materials and material combinations
  • Instrument connection via radial gauge adapter
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Diaphragm seals are used for the protection of pressure measuring instruments in applications with difficult media. In diaphragm seal systems, the diaphragm of the diaphragm seal effects the separation of the instrument and the medium.
Features
  • Compact cell-type
  • Intermediate flange with flush diaphragm
  • Common standards and nominal widths available
  • Wide variety of different materials and material combinations
  • Instrument connection via radial gauge adapter

Specifications

Back-Up Flange Pressure Rating

  • 150#RF
  • 2500#RF
  • 1500#RF
  • 900#RF
  • 600#RF
  • 300#RF

Back-Up Flange Material

  • Carbon-steel passivated, powder coated
  • 316 stainless steel

Wetted Material

  • 316 stainless steel, gold-plated
  • Zirconium
  • Nickel 200
  • Titanium, grade 2
  • Tantalum
  • Incoloy® 825
  • 316 stainless steel, ECTFE (Halar®) coated
  • 316 stainless steel, Teflon® coated
  • 316 stainless steel, virgin Teflon® lined
  • Hastelloy® C-276
  • Hastelloy® B-2
  • Monel®
  • 316 stainless steel
  • Inconel® 600

Upper Housing Material

  • Titanium, grade 2
  • 316 stainless steel

Flange Rating

  • Raised face

Process Connection

  • 5” Pipe
  • 4” Pipe
  • 3” Pipe
  • 2” Pipe
  • 1.5” Pipe

Instrument Connection

  • 1/4” NPT female
  • Capillary connection (To weld capillary directly to seal)

Diaphragm Seal Design

  • Pancake Type, Flush Diaphragm

Typical Applications

  • Aggressive, highly viscous, crystallising or hot media
  • Process industry
  • High-pressure applications