Overview: This paper presents a guide to understanding the various pinch valve configurations, detailing their benefits and limitations. It illustrates a full round full port single pinch valve, a pre-pinched full port single pinch valve, and a full round full port dual pinch valve, describing the applications they are suited for. Importance of matching the port size to the actual flow condition for achieving the optimum flow control when using pinch valves for throttling applications is stated, detailing the benefits of reduced port pinch valves. The paper also illustrates the design and benefits of various types of reduced port pinch valves.
