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Model A Flange Sight Glass


The Model A Flange unit mounts on standard ANSI B16.5 (2" to 8") flange accommodations, and can be manufactured to meet a wide range of pressure and temperature requirements. The lens and packing are contained by a retainer ring on the process side of the flange. Different materials of construction are available to meet your process needs. Applications requiring DIN standards or non-ANSI flanges are available upon request.

Materials of Construction:

  1. Flange: 316 or 304 Stainless Steel SA-182; Carbon Steel SA-105
  2. Compression Ring: 304 Stainless Steel SA-351; Carbon Steel SA-519
  3. Snap Ring: 304 Stainless Steel SA-351; Carbon Steel SA-519
  4. Retainer Ring: 316 or 304 Stainless Steel SA-351; Carbon Steel SA-519
  5. Lens: Two-Piece Laminated Tempered Soda Lime (Standard); Tempered or Annealed Borosilicate; Quartz; Lexan; Acrylic; Mica Shields
  6. Lens Cushion Gaskets: Teflon ; Grafoil ; Gylon ; Blue-Gard ; etc.
  7. Lens Packing: Combination Teflon Impregnated and Viton
    (Standard); Graphite; FDA Teflon ; etc.
  8. Compression Screws: 18-8 Stainless Steel; Carbon Steel SA-193

Factory Mutual Approved
This sight glass has been certified as maintaining a Quality Assurance System in accordance with the Pressure Equipment Directive 97/23/EC (PED) Annex I, Paragraph 4.3 by the Certification Body 0036 of the TÜV Industrie Service GmbH.

* FM Approval Excludes 600psi models

Model A Flange Sight Glass

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4540 W. Washington St. Charleston, WV 25313
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