Minivalve International designs, manufactures, and distributes miniature self-actuating valves and valve components, includin ... g one-way check valves, pressure-relief valves, access valves, and dispensing valves. Our catalog includes Duckbill valves, Umbrella valves, Cross-Slit valves, and many more. Applications include PPE, breathing masks, pumps, respirators, ventilators, trocars, and hemostasis valves for catheter introducers. Whether you need a standard or custom valve, we’re your valve experts. read more