Duncan Company is a premier supplier of Valves and Actuators, Instruments and Process Controls, Process Safety Products and Piping Specialties.  For over 100 years we have strived to supply the market with Quality Products, excellent Customer Service and Innovative Solutions.

As one of Minnesota’s largest stocking Industrial Distributor of ball valves and butterfly valves, actuators, instruments and controls, safety products and piping specialties we can supply you with the following key product manufacturers:  Jamesbury, Adams Valves, Apollo, Cashco, VCI – Valve Concepts, Inc., Fairchild Regulators, Anderson Greenwood Instrumentation, DynaFlo, Asco, ABZ, Accuseal Critical Service Valve, Champion Valve, Kelair Damper Valves, Williams Valves, Rotork, VSI Waterworks, Morin, Edward Valve, Powell, P.B.V., Yeary Controls-Sharktooth, DSI, SVF Flow Control, Saunders, StreamFlo Industries, Sharpe, Leser, Taylor, FluoroSeal, InLine Ball Valve,  Xomox, EVR Products, AQ Matic, Hayward, Habonim, Kinetrol, Remote Control, US Valve, KOSO Hammel Dahl, Pratt Valves, Wika Instrumentation, Spirax Sarco, YTC, Soldo, TopWorx, Go Switch, Midland-ACS, Hawk Measurement, Fil-trek, BS&B Safety Systems, Parker, BLX, Hy-Lok USA, JMS, Westlock, DFT, Donaldson, Precision Digital, Rotronic, Thermal Instrument, Trerice, Tru-Flo, Keckley, Dynamix Agitators, Sentry Equipment, Grinnell, Shurjoint, Federal Screen, TopLine Products and more.


Duncan – Wisconsin

Formerly GWS Supply



Arjay Automation, Division of Duncan Company

Division of Duncan


Duncan Valve Automation Photo Gallery


Our History

Outsourcing