If corrosion resistance is only needed on wetted parts of a sight glass, our
Model I Weld sight glass unit is an ideal choice for the application.
The Model I's insert can be made from a wide variety of materials (stainless steel, glass-lined, or Hastelloy, etc) to ensure compatibility with any process fluid, while the main unit body can be made of carbon steel (or any material your application requires). As with all PPC products, the Model I Weld can be made to meet any pressure and temperature requirements.
| Materials |
| Weld Pad: |
316 or 304 Stainless Steel SA-351 or SA-240; Carbon Steel PVQ; Hastelloy; Alloy 20; Titanium; Monel; etc. |
| Flange: |
316 or 304 Stainless Steel SA-351; Carbon Steel SA-519 or PVQ |
| Insert: |
316 or 304 Stainless Steel SA-351; Carbon Steel SA-519; Hastelloy; Alloy 20; Titanium; Monel; etc. |
| Compression Ring: |
304 Stainless Steel SA-351; Carbon Steel SA-519 |
| Lens: |
Two-Piece Laminated Tempered Soda Lime (Standard); Tempered or Annealed Borosilicate; Quartz; Lexan; Acrylic; Mica Shields |
| Lens Cushion Gaskets: |
TeflonⓇ GrafoilⓇ GylonⓇ Blue-GardⓇ etc. |
| Retainer Bolts: |
18-8 Stainless Steel; Carbon Steel SA-193* |
| Lens Packing: |
Combination TeflonⓇ Impregnated and VitonⓇ (Standard); Graphite; FDA TeflonⓇ etc. |
| Compression Screws: |
18-8 Stainless Steel; Carbon Steel SA-193* |
| Mating Gasket: |
GylonⓇ TeflonⓇ GrafoilⓇ Blue-GardⓇ etc. |
*By request only
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.
