Long butt weld reducer LS d125x90 PE100, SDR11, PN10 gas/PN16 water 753901081

Application and Compatibility

The long spigot (LS) butt fusion reducer enables smooth transition between pipes of different diameters in installations made of PE100 polyethylene. The d125×90 model (DN100 → DN80) works well in both gas networks (PN10) and water supply systems (PN16), making it a universal element for contractors working on infrastructure expansion or modernization.

The long spigot (LS - Long Spigot) provides adequate surface for butt fusion welding. A zeta coefficient equal to 1 means minimal pressure losses on this element - an important feature when designing distribution networks, where each change in cross-section affects flow parameters.

Construction and Execution

The body is made of high-density polyethylene PE100 - a material widely used in underground installations due to its resistance to corrosion and soil operating conditions. The spigot welding surfaces are in raw condition, without additional processing - ready for direct fusion with system pipes.

Geometric parameters for this specific size:

Parameter	Value
Larger spigot outer diameter	125 mm
Smaller spigot outer diameter	90 mm
Larger spigot wall thickness	11.4 mm
Smaller spigot wall thickness	8.2 mm
Total length (Lmax)	211 mm

The one-piece construction eliminates the risk of leakage at component joints - the entire body constitutes a single casting or factory-molded pipe section. The straight shape means axial alignment of both spigots relative to each other.

Operating Parameters and Conditions of Use

The dimension ratio SDR11 defines the ratio of outer diameter to wall thickness - the lower the SDR, the thicker the wall and higher pressure resistance. For this model, it means allowable working pressure of 16 bar at 20°C in water installations and 10 bar for gas transmission.

The reducer is not equipped with elastomeric seals or valves - its role ends at the hydraulic transition between diameters. The lack of air vent and drain valve is typical for this type of fittings; venting and drainage are handled by separate network elements.

The available size range in the series includes reducers from d25/d20 up to d630/d560 - the manufacturer offers a complete range of sizes to realize practically any diameter transition in PE100 SDR11 systems.