Since 1917 Shields, Harper & Co. has been a distributor of petroleum equipment products for retail and commercial fueling app ... lications across the western United States. Currently the company operates eight warehouses in Arizona, California, and Nevada, each of which stock products from the industry’s leading manufacturers. Fueling systems expertise include retail and commercial fueling stations, marine fueling centers, airport fueling centers and emergency reserve fueling systems for hotels, hospitals, data centers and more. read more