one way valve

thingiverse

One way valve. This kind of valves used to allow the fluids to flow in one direction only, and prevent any back-flow. The principle behind this design is that the incoming flow will produce a pressure causing the port to open, and the pressured caused by the fluid trying to flow in the other direction will close the port. All the parts are printable by the 3D printer. This design may be used in low-cost ventilators. Thanks to our respected audience, there are some drawbacks in this design, making it impractical for ventilators. Such as: 1-There should be a spring to ensure back movement. 2-The valve must be directed in a specific direction to operate. 3-The door should not be opened more than 90 degrees. These points will be covered in the next design. The design is free and available at thingiverse and grab cad. Any suggestion from you is most welcome.