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FISHER DN50/40/65

Technical Specifications Parameter DN40 DN50 DN65 Nominal Diameter 40 50 65 Imperial Equivalent 1½ inch 2 inch 2½ inch Pipe Outer Diameter ≈ 48.3 mm (1.90 in) ≈ 60.3 mm (2.37 in) ≈ 76.1 mm (3.00 in) Flange Standards ISO 6162, ANSI B16.5 ISO 6162, ANSI B16.5 ISO 6162, ANSI B16.5 Typical Valve Types Control valves, Regulating valves, Ball valves Control valves, Regulating valves, Gate valves High-pressure control valves, Large-size regulating valves

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The designations DN40, DN50, and DN65 represent Standardized Nominal Diameters according to ISO (International Organization for Standardization) specifications. "DN" stands for "Diamètre Nominal" (Nominal Diameter). These are not standalone product models but standardized sizing designations that specify the flow passage dimensions of Fisher valves and piping components. When used as suffixes in Fisher product models, they indicate valves designed to connect with pipelines of corresponding sizes, ensuring proper flow capacity and system integration.