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China Rubber Flexible Fire Hose No Hub Coupling - Reliable Suppliers and Factory for Pipe Connections
✨ Key Features & Benefits
- Quick & Tool-Free Installation Connects to pipes with simple tightening of 304/301 stainless steel clamps, cutting installation time by over 70% compared to flanged joints.
- Multi-Displacement Compensation Absorbs axial, lateral, and angular movements caused by thermal expansion, foundation settlement, or equipment vibration, preventing pipe stress and leakage.
- Vibration & Noise Reduction The high-elastic rubber body effectively isolates pump/compressor vibrations and reduces fluid-borne noise in HVAC, plumbing, and industrial systems.
- Leak-Proof Self-Sealing Design Double-lip rubber seals conform tightly to pipe outer walls, creating a reliable, pressure-resistant seal without gaskets.
- Corrosion & Chemical Resistance Available in EPDM, Neoprene, and NBR rubber compounds to suit water, wastewater, mild chemicals, and oil applications.
- Universal Pipe Compatibility Fits PVC, cast iron, steel, and copper pipes, ideal for repair projects or mixed-material piping runs.
📋 Product Specifications
| Parameter | Details |
|---|---|
| Available Sizes | 1.5"–8" (custom sizes available) |
| Working Pressure | Up to 1.6 MPa (custom higher-pressure options) |
| Temperature Range | -30°C to +120°C (varies by rubber compound) |
| Materials |
- Body: Natural rubber/PVC - Clamps: 301/304 stainless steel |
| Types | Straight coupling, reducing coupling, end cap |
| Certifications | UPC/ISO 9001 |
🏢 Applications
- Building plumbing and drainage systems
- HVAC and cooling tower piping
- Pump inlets/outlets and mechanical equipment connections
- Wastewater treatment plants
- Industrial process piping with mild chemical exposure
- Emergency pipe repair and retrofitting projects
📦 Packaging & Delivery
- Standard export carton with anti-scratch protection
- Custom labeling and OEM/ODM services available
- Fast lead time for standard sizes (5–7 days)
- Bulk order discounts for project-based purchases
🛒 Why Choose Us?
As a professional manufacturer of pipeline accessories, we offer:
- Factory-direct pricing with no middleman markup
- Strict quality control for consistent performance
- Custom engineering support for special applications
- Global shipping to over 50 countries with reliable logistics
Contact our sales team today to request a quote or discuss your project requirements!
❓ Frequently Asked Questions
How do I install these flexible rubber couplings?
Installation is quick and tool-free. Simply slide the rubber coupling over the pipe ends and tighten the integrated 304/301 stainless steel clamps until secure. This cuts down installation time by over 70% compared to traditional flanged joints.
What pipe materials are these couplings compatible with?
These couplings feature universal compatibility and fit seamlessly with PVC, cast iron, steel, and copper pipes. They are highly recommended for mixed-material piping runs and emergency repairs.
Which rubber compounds are available for different applications?
We offer EPDM, Neoprene, and NBR rubber compounds. EPDM is excellent for water and outdoor HVAC systems, Neoprene handles mild chemical exposure, and NBR is ideal for oil and hydrocarbon applications.
Can these couplings handle high temperature and pressure?
Yes, our standard couplings support working pressures up to 1.6 MPa and temperatures ranging from -30°C to +120°C (depending on the rubber compound selected). Custom options for higher pressure ratings are also available.
Do you offer custom sizing and OEM services?
Yes, while our standard size range is 1.5" to 8", we can manufacture custom sizes to meet specific project needs. We also provide OEM/ODM services and custom labeling for bulk orders.