Mechanically and manually operated valves come in a variety of models, including stem or roller operated, hand lever with detent or spring return, panel-mounted 3/2 and 5/2-way, and foot operated with or without protective covers.
Airtec Pneumatic Inc., 730 Racquet Club Rd., Addison, IL 60101, (630) 534-0265, www.airtec-usa.com