A Clear Checklist for Planning a Successful One Piece Valve Project

https://miniopticalparts.capitaljays.com/posts/nbr-valves-testing-checklist-for-seal-fit-and-opening-pressure

Designing a small part can affect the whole product. A one piece valve may look simple, but it has a real job to do. It must work with the cap, case, fluid, air path, or light path around it