{"id":7415,"date":"2025-09-29T14:37:31","date_gmt":"2025-09-29T14:37:31","guid":{"rendered":"https:\/\/www.pecta.pt\/produto\/high-pressure-flow-sight-glass-type-520a-class-300-1500-lbs\/"},"modified":"2026-03-31T13:42:42","modified_gmt":"2026-03-31T13:42:42","slug":"high-pressure-flow-sight-glass-type-520a-class-300-1500-lbs","status":"publish","type":"product","link":"https:\/\/www.pecta.pt\/en\/produto\/high-pressure-flow-sight-glass-type-520a-class-300-1500-lbs\/","title":{"rendered":"High-Pressure Flow Sight Glass Type 520A – Class 300\/1500 lbs"},"content":{"rendered":"
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The extremely robust body is made of corrosion-resistant stainless steel<\/strong> (e.g., 1.4571 \/ 316Ti), ensuring reliability even under continuous high-pressure and high-temperature loads.
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Optionally, versions in special alloys<\/strong> such as nickel-based alloys or Hastelloy\u00ae<\/strong> are available, suitable for highly aggressive<\/strong> process environments or with high thermal stress<\/strong>.<\/p>\n

Glass construction<\/h5>\n

The high-pressure flow sight glass type 520A is equipped with two opposing windows<\/strong> made of thermally toughened borosilicate glass to DIN 7080<\/strong>.<\/p>\n

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  • These windows allow clear and safe<\/strong> observation of the process from both sides, as well as the option of directed illumination.<\/li>\n
  • Optionally, the sight glass can be supplied in a double-glazed version (double glazing)<\/strong>, in which two glass discs per side<\/strong> are installed. This version offers: <\/li>\n
  • Greater operational safety<\/strong><\/li>\n
  • Increased resistance to thermal and chemical loads<\/strong><\/li>\n
  • Option to integrate mica discs<\/strong> or FEP\/Halar\u00ae coatings<\/strong> to extend the service life of the glass<\/li>\n<\/ul>\n

    Visibility from both sides<\/strong> enables real-time visual monitoring\u2014 a significant safety and efficiency advantage in modern process engineering.<\/p>\n

    Flanged connections<\/h5>\n
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    • Design to DIN EN 1759-1<\/strong>, compatible with mating flanges to ASME B 16.5<\/strong><\/li>\n
    • Design, strength calculation, and manufacture in accordance with the PED 2014\/68\/EU<\/strong> and AD 2000<\/strong> regulations<\/li>\n
    • Available for pressure classes up to Class 1500 lbs<\/strong><\/li>\n<\/ul>\n
      Applications<\/h5>\n
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      • Chemical and petrochemical industry<\/li>\n
      • Pharmaceutical and food industry<\/li>\n
      • Power plants<\/li>\n
      • High-pressure steam and thermal oil systems<\/li>\n<\/ul>\n
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        TECHNICAL DATA \u2013 High-Pressure Flow Sight Glass Type 520A<\/h4>\n\n\n\n\n\n\n\n\n\n
        Flange material:<\/strong><\/td>\n316 Ti stainless steel – 1.4571
        \nOther alloys to customer specifications<\/td>\n<\/tr>\n
        Form:<\/strong><\/td>\nFlow Sight Glass<\/td>\n<\/tr>\n
        Seals:<\/strong><\/td>\nGraphite<\/td>\n<\/tr>\n
        Nominal size (DN):<\/strong><\/td>\n1 \u00bd” to 8″<\/td>\n<\/tr>\n
        Nominal pressure (PN):<\/strong><\/td>\n300 lbs – 1500 lbs<\/td>\n<\/tr>\n
        Temperature \/ Glass:<\/strong><\/td>\nup to 280 \u00b0C with borosilicate glass DIN 7080<\/td>\n<\/tr>\n
        Options:<\/strong><\/td>\nMica protection disc against temperature and steam
        \nFEP or Halar\u00ae coating for additional chemical protection
        \nDouble glazing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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