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Wide Range Ductile Iron Flexible Universal Coupling for Water Supply Pipe Connections
Product Spotlights
Wide-range ductile iron flexible coupling for water supply pipes: absorbs misalignment up to 3°, fits DN50–DN300, stainless steel bolts, EPDM gasket. ISO9001 certified, in stock at Hebei Speed Torque. Customizable sizes and colors. Reduces installation time and inventory costs. Contact for bulk pricing.
Negotiable
MOQ: 10 Pieces (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Ductile Iron (GGG50)
Size Range:
DN50 – DN300 (2“ – 12“)
Working Pressure:
PN10 – PN16
Payment & Shipping
Payment Methods:
Port of Shipment:
Tianjin
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Ductile Iron (GGG50)
Size Range
DN50 – DN300 (2“ – 12“)
Working Pressure
PN10 – PN16
Connection Type
Flanged / Grooved / Threaded (optional)
Color
Black / Red / Custom RAL colors available
Application
Water supply pipe connections, sewage, industrial pipelines
Certification
ISO9001:2015
Model Number
ST-FC series
Brand
Hebei Speed Torque / OEM available
Hebei Speed Torque Transmission Technology Co., Ltd. presents our Wide Range Ductile Iron Flexible Universal Coupling, a robust solution designed for seamless water supply pipe connections. Manufactured in our 3,000–5,000 m² facility in Cangzhou, Hebei, this coupling offers exceptional flexibility and durability to accommodate misalignment, vibration, and thermal expansion. With ISO9001 certification and over 7 years of export experience to global markets, we ensure every product meets rigorous quality standards. This coupling is your reliable partner for safe, leak-proof piping systems.
Product Features & Technical Specifications
- Wide Tolerance Range: Adjusts to pipe diameter variations up to ±10 mm, simplifying installation and reducing inventory needs.
- Ductile Iron Construction: High tensile strength (min. 420 MPa) and excellent corrosion resistance, ideal for potable water and wastewater.
- Flexible Design: Absorbs axial, lateral, and angular misalignment up to 3° per joint, protecting pipes from stress.
- Universal Compatibility: Works with cast iron, steel, PVC, HDPE, and ductile iron pipes – no special adapters required.
- Easy Installation: Slip-on design with stainless steel bolts and rubber gasket – no welding or threading needed.
- Leak-proof Sealing: EPDM/NBR gasket ensures zero leakage under working pressure up to PN16.
- Corrosion Protection: Epoxy powder coating (minimum 250 μm) inside and outside, complying with AWWA C213 standard.
- Long Service Life: Designed for >30 years in normal water supply conditions.
| Parameter | Value |
|---|---|
| Size Range (DN) | DN50 – DN300 (custom sizes up to DN600 available) |
| Working Pressure | PN10, PN16 (higher on request) |
| Temperature Range | -20°C to +120°C (depending on gasket material) |
| Gasket Material | EPDM (standard), NBR, Silicone (optional) |
| Bolt Material | Stainless Steel 304 / 316 |
| Coating | Fusion-bonded epoxy (FBE) – blue/black/red |
| Compliance | ISO9001, EN 545, EN 598 (upon request) |
Benefits for Your Water Supply Projects
- Reduces Installation Time: No need for precise pipe alignment – flexible coupling adjusts automatically, saving up to 50% labor.
- Minimizes Inventory: One universal coupling replaces multiple sized joints, covering a wide diameter range – ideal for maintenance teams.
- Enhances System Reliability: Absorbs ground settlement, thermal movement, and pressure surges, preventing joint failure.
- Cost-effective: Lower total cost of ownership compared to flanged connections or welded joints, with easy disassembly for repairs.
- Environmentally Friendly: Ductile iron is 100% recyclable; epoxy coating is lead-free and safe for drinking water.
Trusted Quality – Your Reliable Partner
Hebei Speed Torque Transmission Technology Co., Ltd., established in 2017, operates a modern factory covering 3,000–5,000 square meters with 101–200 skilled employees. Our annual export value exceeds US$5 million, serving customers across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, and the Middle East. We ship from the ports of Shanghai, Tianjin, and Qingdao, ensuring timely delivery worldwide.
Every coupling is produced under a strict ISO9001:2015 quality management system, with 100% pressure testing before shipment. Our R&D team continuously improves product design to meet evolving market demands. We offer OEM/ODM services, custom sizes, and color options to match your specific requirements.
Choose Hebei Speed Torque for your water supply pipe connections – you get a product that combines flexibility, durability, and universal compatibility, backed by a company committed to excellence. Contact us today for a quote or sample testing.
Frequently Asked Questions (FAQ)
-
Q: What pipe materials are compatible with this coupling?
A: It works with ductile iron, cast iron, steel, PVC, HDPE, and GRP pipes. For special materials, please consult our technical team. -
Q: What is the maximum angular misalignment allowed?
A: The coupling can accommodate up to 3° angular deflection per joint. For combined axial/lateral movements, refer to our installation manual. -
Q: Is this coupling suitable for underground installation?
A: Yes, the epoxy coating provides excellent corrosion resistance. For direct burial, we recommend additional wrapping as per local standards. -
Q: What gasket material is standard? Is it suitable for potable water?
A: Standard gasket is EPDM, which complies with WRAS and NSF61 for drinking water. NBR (oil-resistant) and silicone are optional. -
Q: Can I get a sample before bulk order?
A: Yes, we offer samples against freight cost. Upon approval, sample cost can be deducted from the first order. -
Q: What is the lead time for standard sizes?
A: For DN50-DN200, lead time is 15-20 working days after deposit. Larger sizes may require 25-30 days. -
Q: Do you provide installation instructions?
A: Yes, each coupling comes with a detailed installation guide and torque specifications for bolts. -
Q: What is your warranty policy?
A: We offer a 2-year warranty against manufacturing defects. Extended warranty is available upon request.
Send Inquiry to This Supplier
Mr. Drake
Product Manager
1Yr
Cangzhou, Hebei, China
1Yr
Year Established
2017
Factory Size
3,000-5,000 square meters
Annual Export Value
US$5 Million - US$10 Million
Total Employees
101 - 200 People
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