{"id":7399,"date":"2025-10-16T13:17:32","date_gmt":"2025-10-16T13:17:32","guid":{"rendered":"https:\/\/www.pecta.pt\/produto\/type-551-sight-flow-indicator-pn-16-40\/"},"modified":"2026-03-31T13:46:04","modified_gmt":"2026-03-31T13:46:04","slug":"type-551-sight-flow-indicator-pn-16-40","status":"publish","type":"product","link":"https:\/\/www.pecta.pt\/en\/produto\/type-551-sight-flow-indicator-pn-16-40\/","title":{"rendered":"Type 551 Sight Flow Indicator – PN 16\/40"},"content":{"rendered":"
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The ACI type 551 sight flow indicator<\/strong> is a robust indicator<\/strong> designed for industrial applications<\/strong>.
The body is made of high-quality 1.4408 cast stainless steel<\/strong>, ensuring excellent corrosion resistance<\/strong> and high mechanical strength<\/strong>.<\/p>\n

The design features internal BSP or NPT threads<\/strong>, allowing for the visual observation of fluids in pipelines under operating pressure<\/strong>.<\/p>\n

Type 551 is manufactured in accordance with DIN 11869<\/strong> (formerly DIN 3237<\/strong>).<\/p>\n

Threaded connections<\/strong><\/h6>\n
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  • BSP threads<\/strong> according to DIN EN ISO 228-1<\/strong><\/li>\n
  • NPT threads<\/strong> according to ANSI B 1.20.1<\/strong><\/li>\n<\/ul>\n
    TECHNICAL DATA \u2013 Type 551 Sight Flow Indicator<\/span><\/h5>\n<\/div>\n
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    Flange Material:<\/strong><\/td>\nStainless Steel – 1.4408
    \nOther alloys according to customer specifications<\/td>\n<\/tr>\n
    Form:<\/strong><\/td>\nFlow Sight Glass<\/td>\n<\/tr>\n
    Gaskets:<\/strong><\/td>\nFrenzelit novaphit\u00ae MST XP
    \nKlingerSil\u00ae C4400
    \nGarlock Gylon\u00ae
    \nPTFE (pure or modified)
    \nMore than 50 other sealing materials available upon request<\/td>\n<\/tr>\n
    Nominal Size (NPS):<\/strong><\/td>\n\u00bc” – 2″<\/td>\n<\/tr>\n
    Nominal Pressure (PN):<\/strong><\/td>\nPN16 – PN40<\/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 for temperature and steam
    \nPTFE rotor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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