National Oilwell Varco's Best Flow product line manufactures and distributes a range of pressure control devices for the oil and gas industry including adjustable choke valves and hydraulic stepping actuators.
In 1958, Best Flow Products was founded as Best Industries. In 1977, Varco International purchased Best Industries and changed the name to Varco/Best Flow Products. In 1992, the Shaffer Company was purchased by Varco International and the product lines were merged.