Duo Check Valves, also known as double-door check valves or dual-plate check valves, are a type of non-return valve designed to prevent the backflow of fluids in a pipeline. The key feature of a duo check valve is its two spring-loaded half-discs or plates that pivot on a hinge pin. These plates open to allow fluid flow in the forward direction and automatically close when the flow stops or reverses, preventing backflow.
Duo check valves are compact and lightweight, making them an ideal choice for applications where space and weight are critical considerations. They are widely used in marine environments due to their robust construction, low-pressure drop, and ability to operate efficiently under various conditions.
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