Oliver Valve Operating under three companies for over 35-years, Oliver Valves, Oliver Valvetek and Oliver Twinsafe have grown to become one of the world' s leading manufacturers of Instrumentation, Subsea and Pipeline valves for the global energy sectors. Specialising primarily in the Oil, Gas and Petrochemical industries, we operate internationally across all regions, and have sales teams strategically located in countries all over the world. It is our mission to provide all of our customers with outstanding technical customer service, on-time deliveries and continued Engineering innovation.