Sigma Industrial Sales is a Saskatchewan company, based in Regina since 2002, specializing in the selection, supply and repair of control valves. Sigma represents a number of companies, the largest being Dyna-Flo. Dyna-Flo is a Canadian manufacturer of Industrial Control valves, supplying valves to the Canadian, and US markets. The Valve product line consists of Globe Valves, Segmented Ball Valves, Sliding Stem and Rotary Actuators.