Weather Resistance Underwater Flange Integral Duckbill valve

Product Overview

The Weather Resistance Underwater Flange Integral Duckbill Check Valve is a high-performance fluid control component designed for harsh underwater environments. Combining advanced structural design with weather-resistant materials, this Valve effectively prevents backflow, sediment accumulation, and corrosion, ensuring reliable operation in marine, municipal, and industrial applications.

As a core product of RUNXING, our Weather Resistance Duckbill Check Valve series integrates Flange connection for easy installation and integral molding for enhanced structural stability. Unlike traditional check valves, the duckbill design eliminates the need for mechanical parts, reducing maintenance costs and extending service life—making it an ideal choice for long-term underwater deployment.

Whether you require the Underwater Flange Integral Duckbill Check Valve for coastal protection projects or the Weather Resistance Underwater Duckbill Check Valve for wastewater treatment systems, our products deliver consistent performance under extreme temperatures, high pressure, and corrosive conditions.

Product Features & Advantages

Core Working Principle

The Duckbill Valve operates based on fluid pressure difference. When fluid flows forward, the pressure pushes the duckbill opening to expand, allowing unobstructed flow; when backflow occurs, the reverse pressure closes the duckbill tightly, forming a reliable seal. The integral structure eliminates gaps where sediment can accumulate, ensuring long-term unobstructed operation.

Key Features

Installation & Usage Steps

1. Preparation: Confirm the valve model, size, and flange standard match the piping system. Inspect the valve surface for damage and clean the flange sealing face.
2. Positioning: Install the valve in the correct flow direction (marked on the Valve Body). Ensure the duckbill opening faces the forward flow to avoid installation errors.
3. Flange Connection: Align the valve flange with the pipeline flange, insert bolts evenly, and tighten nuts in a crisscross pattern to ensure uniform pressure on the sealing gasket.
4. Sealing Check: After installation, conduct a pressure test (recommended pressure: 1.25 times the working pressure) to verify no leakage at the flange connection or duckbill seal.
5. Commissioning: Open the upstream valve gradually to allow fluid to flow through, checking for abnormal noise or vibration. Confirm the valve opens and closes smoothly without jamming.
6. Regular Inspection: For long-term underwater use, conduct annual visual inspections (via diving or remote cameras) to ensure no fouling or damage to the duckbill surface.

Production Process

1. Material Selection: High-quality rubber and metal materials are sourced from certified suppliers, with strict incoming inspection for chemical composition and mechanical properties.
2. Mold Design & Fabrication: Computer-aided design (CAD) is used to create precision molds for integral molding, ensuring consistent product dimensions and structural accuracy.
3. Rubber Compounding: Rubber materials are mixed with additives (anti-aging, reinforcing agents) according to custom formulations, then vulcanized to achieve desired performance characteristics.
4. Integral Molding: Rubber duckbill and flange are molded as a single unit using high-pressure injection molding, eliminating assembly gaps and enhancing structural integrity.
5. Flange Processing: Metal flanges undergo CNC machining, grinding, and surface treatment (galvanizing, painting) to meet international flange standards and corrosion resistance requirements.
6. Quality Inspection: Each valve undergoes dimensional measurement, pressure testing, leakage testing, and weather resistance testing to ensure compliance with technical specifications.
7. Packaging: Products are packaged in moisture-proof, shock-resistant materials to protect against damage during transportation, with clear labeling for easy identification.

Our advanced production facilities and strict quality control system ensure that every Weather Resistance Duckbill Check Valve meets the highest standards of reliability and performance.