Butterfly Valve – Screwable for IBC-DN80 (80mm Internal Diameter) Measurements: Female S60 = 56-62mm ID Female S75 = 70-75mm ID Female S80 = 75-80mm ID Male NW50 = 62mm OD Standard BSP = British standard pipe-thread, fine. NPS=Nominal Pipe Size, fine. NPT=National Pipe Tapered Thread, fine. Measurements given by the manufacturer as NW, DN, or S all refer to approximate/nominal sizes e.g. NW50 is nominally 50mm. S70 is nominally 70mm. However, DIN is an exact measurement e.g. DIN61 is 61mm. NW50 also known as buttress or coarse thread. Also known as DIN61 or S60.
