Ductile iron wide tolerance stepped coupling is a coupling used to connect two pipes or fittings of different sizes. It is made of ductile iron, which is a cast iron that is more flexible and durable than traditional cast iron.

The wide tolerance design of the coupling allows a larger range of pipe sizes to be connected, thereby reducing the need for multiple couplings and fittings. The stepped design of the coupling provides a safe and tight fit between the pipes, ensuring a leak-free connection.

Ductile iron wide tolerance stepped couplings are commonly used in industrial applications such as water and wastewater treatment plants, and oil and gas pipelines. They are also used in plumbing and HVAC systems to connect pipes of different sizes.

Overall, the ductile iron wide tolerance stepped coupling is a reliable and cost-effective solution for connecting pipes of different sizes. It can provide a safe and leak-free connection and can withstand the requirements of various applications.

• Wide OD range: 21mm on average.

• Small number of models with nominal diameter.

• Reliability:

-When the gasket between the end flange and the sleeve is compressed to the surface of the pipe, the permanent leak-proof joint.

-Corrosion protection: Epoxy powder coating (150 μm) and Dacrosome®Gr.B for 500 bolts.

• Ease and speed of installation:

-Angular deflection ± 6 °.

-Absorbs expansion and contraction.

-Adapt to dislocation.

-Important set gaps.

Conform to the standard:

-NF A 48-830: Cast Products-Ductile Iron

Pressure PVC drinking water pipe fittings.

-NF EN 545: Ductile iron pipes, fittings, accessories and their joints for water pipelines-Requirements and test methods.

-ISO 2531: Ductile iron pipes, fittings, fittings and their joints for water applications.

• Approval:

-Drinking water approval.

Note:

This coupling does not resist longitudinal forces and ensures that sufficient restraint is provided to prevent pipe misalignment.

Technical Data

• Range: DN 40/50 to 400.

• Maximum working pressure: PN 16.

• Temperature: 0°C to 60°C.

• Torque: 60 to 70 Nm.

Application

• Drinking water network.

• Pumping, treating and storing water.

• Fire network.

Irrigation network.

• Sewage networks and drainage

(WC type - EN 681-1)。

Test

• Seal test according to standard ISO 2531.