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China Rubber Flexible Fire Hose No Hub Coupling - Reliable Suppliers and Quality Factory Solutions
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
What materials are the rubber couplings and clamps made of?
The coupling bodies are manufactured using high-quality EPDM, Neoprene, or NBR rubber compounds, depending on the application requirements. The accompanying tightening clamps are made of premium 301 or 304 stainless steel to ensure maximum corrosion resistance and durability.
Do I need specialized tools to install these rubber couplings?
No, one of the main advantages is the tool-free and quick installation. The couplings can be securely connected to pipes by simply tightening the integrated stainless steel clamps, which reduces installation time by over 70% compared to traditional flanged joints.
What types of pipe materials are compatible with these couplings?
These couplings offer universal compatibility and can be installed on PVC, cast iron, steel, and copper piping systems. This makes them highly versatile for transition joints, repairs, and mixed-material installations.
What is the working temperature and pressure range for these joints?
They support a working pressure of up to 1.6 MPa (with custom higher-pressure designs available) and can withstand a temperature range from -30°C to +120°C, depending on the specific rubber compound selected.
Can these couplings absorb pipe movements and vibrations?
Yes, the high-elasticity rubber design provides excellent multi-displacement compensation. It absorbs axial, lateral, and angular movements caused by thermal expansion, foundation settling, or equipment vibration, significantly reducing noise and preventing system leaks.