April 11, 2025
Universal Stepped Coupling
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Detail
Universal Stepped Coupling
◆Material Specification:
| No. | Parts Name | Material | Specification |
| 1 | Center Sleeve | Carbon Steel | S235JR |
| 2 | End Ring | Ductile Iron | GGG50 |
| 3 | Rubber Gasket | Rubber | EPDM |
| 4 | Bolt | Dacromet Coated Steel | ISO898-1:1999 |
| 5 | Washer | Dacromet Coated Steel | |
| 6 | Nut | Dacromet Coated Steel | ISO898-2:1992 |
| 7 | Cap | Plastic |
◆ Dimensions(mm)
| Size Range |
Diameter |
Sleeve |
Setting Gap |
Max Gap |
MxL1 |
|||||
| Small End | Large End | |||||||||
| Min | Max | Min | Max | A1 | A | L1 | T | |||
| 59 | 72 | 68 | 84 | 165 | 180 | 115 | 4.5 | 25 | 50 | 4-M12x190 |
| 59 | 72 | 88 | 103 | 165 | 185 | 115 | 4.5 | 25 | 50 | 4-M12x190 |
| 68 | 84 | 88 | 103 | 180 | 185 | 115 | 4.5 | 25 | 50 | 4-M12x190 |
| 88 | 103 | 109 | 128 | 185 | 225 | 115 | 4.5 | 25 | 50 | 4-M12x190 |
| 109 | 128 | 132 | 153 | 225 | 250 | 115 | 4.5 | 25 | 50 | 4-M12x210 |
| 132 | 153 | 159 | 182 | 250 | 275 | 125 | 4.5 | 25 | 50 | 4-M12x220 |
| 159 | 182 | 192 | 210 | 272 | 305 | 125 | 5 | 25 | 50 | 4-M12x220 |
| 192 | 210 | 218 | 235 | 305 | 315 | 135 | 5 | 25 | 50 | 4-M12x230 |
| 218 | 235 | 242 | 266 | 315 | 350 | 135 | 5 | 25 | 50 | 4-M12x230 |
| 242 | 266 | 272 | 289 | 350 | 395 | 135 | 5 | 25 | 50 | 6-M12x230 |
| 272 | 289 | 315 | 332 | 395 | 450 | 135 | 5 | 25 | 50 | 6-M12x230 |
◆ Features
- DuctileIronGGG50(Mild Steel S235JR)material with FBE coated.
- Equippedwith Dacromet Coated Steel bolts,nuts.
- EPDMrubber seals.
- HighTolerance Mechanical Pipe Fittings
Enables the mechanical jointing of pipes made of different materials and of various outside diameters.china manufacturer.
Description
- Wide outside diameter range: an average of 21 mm by side.
- Small number of models for a Nominal Diameter.
- Reliability:
– Permanent leak tight joint when compressing the gasket
between the end-flange and the sleeve onto the pipe surface.
– Anticorrosion protection: epoxy powder coating (150 μm) and
Dacromet® 500 Gr.B for the bolts.
- Ease and speed of installation:
– Angular deflection ±6°.
– Absorbs expansion and contraction.
– Accommodates misalignment.
– Important setting gap.
- Conformity to standards:
– NF A 48-830: Foundry products – Spheroïdal graphite cast iron
fittings for PVC drinking water pipes under pressure.
– NF EN 545: Ductile iron pipes, fittings, accessories and their joints for
water pipelines – requirements and test methods.
– ISO 2531: Ductile iron pipes, fittings, accessories and their joints for
water applications.
- Approval:
– Drinking water approved.
- Nota:
This coupling does not resist to longitudinal forces and be sure
adequate restraint is provided to prevent pipes dislocation.
Technical data
- Range: DN 40/50 to 400.
- Maximal working pressure: PN 16.
- Temperatures: +0°C to +60°C.
- Torque: 60 to 70 Nm.
Applications
- Drinking water networks.
- Pumping, treatment, water storage.
- Fire protection networks.
- Irrigation networks.
- Sewage networks and rain waters drainage
(WC type – EN 681-1).
Tests
- Sealing test according to standard ISO 2531.
