What is the pressure in the duckbill valve?
Pressure in duckbill valve includes cracking pressure & back pressure. The small duckbill valve cracking pressure usually is between 0-5Kpa(0-0.71psi). In some situation, you could add cracking pressure by design, such as increase the thickness of product, cross type of lip. Although it is not the best option with high cracking pressure by duckbill valve. […]