{"id":7404,"date":"2025-10-16T11:09:17","date_gmt":"2025-10-16T11:09:17","guid":{"rendered":"https:\/\/www.pecta.pt\/produto\/type-521-high-pressure-flow-sight-glass-pn-63-400\/"},"modified":"2026-03-31T13:42:01","modified_gmt":"2026-03-31T13:42:01","slug":"type-521-high-pressure-flow-sight-glass-pn-63-400","status":"publish","type":"product","link":"https:\/\/www.pecta.pt\/en\/produto\/type-521-high-pressure-flow-sight-glass-pn-63-400\/","title":{"rendered":"Type 521 High-Pressure Flow Sight Glass – PN 63\/400"},"content":{"rendered":"
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The extremely robust body, made of corrosion-resistant stainless steel (alloy 1.4571 \/ 316Ti)<\/strong>, ensures reliable operation even under continuous high-pressure and temperature loads.<\/p>\n

Upon request, versions in high-resistance materials<\/strong> such as nickel-based alloys<\/strong> or Hastelloy\u00ae<\/strong> are available, allowing for the safe use of the sight glass in highly aggressive environments<\/strong> or those subject to severe thermal stress<\/strong>.<\/p>\n

The Type 521<\/strong> is distinguished by two opposite viewing windows<\/strong> made of thermally tempered borosilicate glass<\/strong> according to DIN 7080<\/strong>.<\/p>\n

TECHNICAL DATA \u2013 Type 521 High-Pressure Flow Sight Glass<\/span><\/h5>\n<\/div>\n
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Flange Material:<\/strong><\/td>\n316Ti Stainless Steel – 1.4571
\nOther alloys according 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>\nDN25 – DN 200<\/td>\n<\/tr>\n
Nominal Pressure (PN):<\/strong><\/td>\nPN63 – PN400<\/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
\nFEP or Halar\u00ae coating for additional chemical protection
\nDouble glazing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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