Master Flo Valve Inc. is a dedicated choke valve and critical service control valve manufacturing company. Since our inception in 1979, we have focused on the supply of quality, reliability and production of high performance valves for the oil and gas industry. This has been achieved with our patented external sleeve design cage choke that was introduced in 1981. Master Flo Valve Inc. incorporated this revolutionary technology into conventional oil and gas and related choke applications in 1983. The product line was fully developed to include actuation and our own metal-to-metal seal technology. Master Flo utilizes this combined technology to provide a proven valve/actuator package for subsea applications. The subsea products introduced in 1991 were based on the standard, proven flow trim technology of our surface choke product line.