Tri-clamp Hygienic Diaphragm Seal

Diaphragm seals are used in order to prevent process sensitive mediums from entering the internals of a conventional pressure gauge. Widely used in industries such as, food, drink, and pharmaceutical.

System filled using FDA compliant fill fluid. Designed to be system filled to analogue gauges, digital pressure gauges, pressure transmitters.


  • Diameter: 63, 100, 160, 200mm
  • Ranges: from -1 bar (-30″Hg) vacuum to 400 bar (6000 psi) pressure (subject to seal)
  • Accuracy: ±1.0% & ±1.6% FSD (subject to diameter)
  • Orientation: Bottom or rear
  • Connection sizes available: 3/4″, 1″, 1.5″, 2″, 2.5″, 3″ & 4″.
  • Electro polished diaphragm
  • Mounting options: Direct
  • Case filling: Dry or glycerine
  • Case material: 304 Stainless steel
  • Wetted parts: 316L Stainless steel
  • Window: Safety glass, polycarbonate
  • FDA approved system fill
  • Weather protection: IP 65


  • Custom ranges/dials
  • Customer logo
  • Indicating or Max drag pointer
  • Rubber shroud
  • Electrical contact
  • Higher polished finish (Ra)
  • Other wetted parts available on request
  • 3.1 Material certificate

Calibration Notes

  • Traceable to national standards
  • UKAS

If you have any questions, please contact us on +44 (0) 117 965 4615 or visit our enquiry page and submit the form.

We can also customise our products to your specific needs.

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Leading industry standards

NQA ISO9001 Accredited and Achilles Affiliated

  • UKAS logo
  • Achilles logo
  • NQA UKAS logo
  • BEMA logo
  • QAS International ISO 14001:2025 logo

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