Pinch valve: How does it work and what are the advantages of an air operated pinch valve? This animated film illustrates the scope of performance of the pinch valve from the market leader AKO Armatures. Air operated pinch valves from AKO are excellent for shutting off and metering abrasive media such as bulk materials or fibrous and viscous products. Pinch valves can also be used for foodstuffs (EHEDG...