The Ductile Iron Flanged Reducer (also called a reducing fitting or taper) is used to transition between two different pipe sizes. It features integral flanges on both ends — the larger flange for the larger pipe, the smaller flange for the smaller pipe. Reducers are manufactured in two configurations: Concentric reducers have a symmetrical taper and are used in vertical pipelines or where the centerline must remain straight. Eccentric reducers have an offset taper and are used in horizontal pipelines to maintain a flat top (prevents air pockets) or flat bottom (prevents sediment accumulation). The fitting is cast from ductile iron QT450-10 with a smooth internal flow path to minimize turbulence and pressure drop. The fusion bonded epoxy coating (minimum 250 microns) provides excellent corrosion resistance for water, wastewater, and mild chemical service.
Why Choose Us / Advantage
Eccentric Orientation Marked: "TOP" or "BOTTOM" cast into body — prevents installation errors.
No Flow Restriction: Full bore transition — internal diameters match standard pipe IDs.
Pressure Rated: Full PN10/PN16 rating — not reduced at the smaller end.
Flange Drilling to Any Standard: ANSI, EN, BS, JIS, or customer drawing.
Short Lead Time: DN50x40 through DN600x500 available from stock or short run.
Technical Data
★ Specification Concentric Eccentric
★ Material Ductile Iron QT450-10 Ductile Iron QT450-10
★ Taper Type Symmetrical Offset (flat top or flat bottom)
★ Coating Epoxy (250μm) Epoxy (250μm)
★ Pressure PN10/PN16/Class150 PN10/PN16/Class150
★ Size Range DN80x50 – DN1200x800 DN80x50 – DN1200x800
★ Flange Drilling ANSI/EN/BS/JIS ANSI/EN/BS/JIS
★ Use Vertical lines Horizontal lines
Applications
● Pump suction reducers (eccentric, flat top to avoid air pockets)
● Pump discharge increasers (concentric)
● Water treatment plant filter inlet/outlet piping
● HVAC system pipe size transitions
● Industrial process piping where space requires size change
