Silicone Duckbill Valve Produced Injection Molding

A Liquid Silicone Duckbill Valve is a one-way valve used in various industries to control the flow of liquids and gases. It is particularly valued for its simplicity, durability, and ability to provide reliable, leak-proof performance in applications requiring a low-pressure, low-flow control mechanism. The “duckbill” name comes from the valve’s distinctive shape, which resembles the bill of a duck. The valve typically features a soft, flexible, and flared end.

Structure and Design:

A liquid silicone duckbill valve typically consists of two main parts: the valve body and the duckbill-shaped diaphragm. The diaphragm is made from high-quality liquid silicone rubber (LSR), a material known for its flexibility, resilience, and resistance to environmental factors such as temperature extremes, UV light, and chemicals. This material also makes the valve very biocompatible, which is crucial for applications in the medical and food industries.

The valve’s body is usually made from materials such as plastic or metal, designed to house the silicone diaphragm in a way that enables it to deform in response to pressure changes. When pressure on one side of the valve is higher than the pressure on the other side, the silicone diaphragm deforms, allowing the fluid or gas to pass through. When the pressure is equalized or reversed, the diaphragm returns to its original closed position, preventing backflow.

Function and Working Mechanism:

The duckbill valve’s core function is to allow fluid or gas to flow in one direction only. The valve achieves this by using the flexibility of the silicone material to form a seal when the pressure differential is reversed, thereby preventing any backflow or leakage.

• Open State: When the upstream pressure is greater than the downstream pressure, the silicone duckbill opens, allowing fluid or gas to pass through. The duckbill’s flared shape helps the valve remain open with minimal resistance, ensuring smooth flow.
• Closed State: When the pressure is equalized or the downstream pressure exceeds the upstream pressure, the valve closes automatically. The silicone diaphragm flexes back to its original shape, forming a tight seal that prevents the backflow of liquid or gas.

This self-regulating feature makes the liquid silicone duckbill valve ideal for applications where continuous or intermittent flow needs to be controlled without requiring manual intervention or external power sources.

Applications:

Due to its versatility and reliability, the liquid silicone duckbill valve is used in a wide range of industries, including:

• Medical Devices: In medical devices like infusion pumps, catheters, and respiratory equipment, the silicone duckbill valve helps control the direction of fluid or airflow, ensuring patient safety and equipment efficiency.
• Food and Beverage: In the food industry, these valves are used in dispensing systems to prevent contamination by preventing the backflow of liquids, ensuring that ingredients flow in a controlled, hygienic manner.
• Industrial: In various industrial applications, these valves are used in systems for controlling fluids in pumps, filters, and drainage systems.
• Aquariums and Water Treatment: Duckbill valves manage fluid flow and prevent contamination in aquarium filtration systems and water treatment plants.

Advantages:

• Durability: Silicone rubber is known for its long-lasting performance, even in harsh environments.
• Low Maintenance: The simple design of the valve requires minimal maintenance and offers long-term reliability.
• Versatility: Liquid silicone duckbill valves can be customized in terms of size, material, and shape to suit specific applications.
• Non-toxic and Biocompatible: The use of liquid silicone makes the valve safe for applications involving food, pharmaceuticals, and medical devices.