Duckbill valves are a type of check valve that is generally made from rubber

Duckbill valves are a type of check valve that is generally made from rubber or a synthetic elastomer. They feature 2 flaps that open and close like a duck’s beak. They are commonly used in medical applications to prevent backflow and contamination. They are also popular in industrial settings.

Ball and spring check valves

A check valve can be used in various applications. They are used to control flow and pressure in a system. However, they may not be suitable for applications where the flow rate is highly fluctuating. In addition, their seat tightness may deteriorate if the differential pressure is small. Therefore, it is necessary to understand the performance specifications before buying a check valve. The performance specifications should include the size of the valve, its pressure rating, media temperature, and the flow coefficient.

Duckbill Check Valves use a flexible, adjustable tube that changes shape in response to the direction of flow. When the flow is in one direction, the soft tube allows the fluid to flow through, while the opposite direction restricts the flow. This valve is available in different shapes and materials.

Rubber duckbill check valves

Rubber duckbill check valves are an excellent choice for irrigation systems and other applications that require a small amount of pressure at the valve opening. This duckbill check valves type of valve offers low cost, minimal noise, and no mechanical parts. Its unique design provides tight sealing and backflow prevention while minimizing head loss. This type of valve also features a long service life and is easy to install.

When installing a rubber duckbill check valve, it is essential to ensure that it is lubricated. Install the valve in a vertical position, with its outlet facing up or down. Once installed, the valve should not rotate in any direction while the flanges are mated together. If fasteners are not installed properly, the valve could rotate.

Flexible check valves

A duckbill check valve is a one-way valve made from flexible material. These valves are designed to permit fluid flow in only one direction and do not require manual intervention. They operate on the principle of differential pressure: when positive pressure is applied, the valve closes, and negative pressure opens the valve.

A duckbill check valve can be made from a variety of materials depending on the working environment. Some of these include food-grade silicone, medical-grade silicone, and liquid silicone rubber. Some are even hydrocarbon-resistant. The material that is used to manufacture a duckbill check valve will determine the cracking pressure. A duckbill valve made of high-hardness silicone rubber will have higher rebound resilience.