About us Minivalve International is your knowledge partner for miniature self-actuating valves and elastomeric valve components. For liquids and gasses. We develop and manufacture our products in house. Product functions include one-way check valves, pressure-relief valves, access valves and dispensing valves. Types include duckbill valves, umbrella and cross-slit valves, Belleville valves and valve balls in silicone, perfluor and other elastomers. Applications include pumps, Y-sites, trocars and haemostasis valves for catheder introducers. We have standard valves. Custom development and prototyping are also avalable.