aiRFlex® is the only air actuated on-off valve in industry standard face-to-face dimensions (1”-60”)– aiRFlex® is a drop in replacement for other valves. The non-stretch aiRFlex® design increases elastomer tube life 2 to 3 times over conventional air-actuated pinch valves. The non-stretch aiRFlex® design increases elastomer tube life 2 to 3 times over conventional air-actuated pinch valves.