Customized Duckbill Check Valve
Premium quality duckbill check valves engineered with patented technology and over 30 years of expertise. Delivering reliable backflow prevention with superior performance and zero maintenance requirements.
Why Choose Our Duckbill Valves
Superior performance backed by patented technology, innovative materials, and precision manufacturing
Patented Technology
Among the first in China to introduce duckbill valve technology with R&D patents for standard and curved-bill designs.
Zero Maintenance
Simple design with no moving parts eliminates maintenance requirements and provides reliable long-term operation.
Low Cracking Pressure
Opens at minimal pressure differential while providing excellent backflow prevention and self-cleaning properties.
Premium Materials
EPDM, neoprene, nitrile, and NR rubber options with SS316/SS304 flanges meeting international standards.
Corrosion Resistant
Superior resistance to corrosion and abrasion with quiet operation and lightweight design for easy installation.
Custom Solutions
Multiple installation types and international flange standards available to meet specific project requirements.
Duckbill Valve Types
Comprehensive range of duckbill check valve configurations for every application
Slip On Type
Installed outside pipe with clamp for easy retrofitting
Flanged Type
Fixed at pipe end with flange for permanent installation
Insertable Type
Fixed inside pipe with clamp for internal mounting
Inline Flanged
Valve body installed inside pipe with flange connection
Technical Specifications
Detailed specifications and working principles for optimal performance
Materials & Standards
Rubber Materials
- EPDM (Ethylene Propylene Diene Monomer)
- Neoprene Rubber
- Nitrile Rubber (NBR)
- Natural Rubber (NR)
Flange Materials
- Stainless Steel 316 (SS316)
- Stainless Steel 304 (SS304)
- Carbon Steel
International Standards
- American Standard (ANSI/ASME)
- Australian Standard (AS)
- British Standard (BS)
- Japanese Standard (JIS)
Working Principle
Forward Flow
Duck bill opens with minimal pressure differential allowing fluid to flow freely through the valve
Backflow Prevention
Reverse pressure causes the bill to close tightly, preventing any backflow or contamination
Self-Cleaning
Flexible rubber construction prevents clogging and provides automatic cleaning action
Long Service Life
No moving parts eliminate wear and maintenance requirements for extended operation
Key Advantages
- Simplicity and reliability with no mechanical parts
- Excellent backflow prevention capabilities
- Low cracking pressure for efficient operation
- Non-clogging and self-cleaning properties
- Lightweight and compact design
Applications
Trusted by industries worldwide for critical backflow prevention and one-way flow control
Wastewater & Stormwater
Treatment plants, discharge systems, and stormwater management
Flood Control
Coastal defense and tidal control applications
Marine & Waterfront
Marine applications and waterfront protection systems
Industrial Processes
Chemical processing and industrial piping systems
Ready to Get Started?
Contact our engineering team for custom duckbill valve solutions tailored to your specific requirements. With patented technology and over 30 years of experience, we deliver reliable backflow prevention worldwide.