Allenair Corporation Allenair Corporation is the leading manufacturer for rotary index tables, air cylinders, hydraulic cylinders, valves, pumps, 2, 3 & 4-way valves, as well as accessories and special order needs. Allenair is located in Fremont, Ohio, and services the entire United States, and is a leading distributor overseas. They manufacture brass and stainless cylinders, directional and timer valves, and index tables. Related LinksWebsite
