English| The pinch valve opens/closes too slowly | Control air line is too small | Extend the control air line as recommended in the manual |
| Install quick exhaust valve | ||
| Control air line is too long | Shorten control air line | |
| Install the control valve directly in the pinch valve | ||
| Install quick exhaust valve | ||
| The vent hole of the control valve is blocked | Clean muffler/control air line | |
| Control air connection is too small | Expand the air connection or use a pinch valve with two air connections | |
| The control valve passage is too small | Install larger control valve | |
| Control medium (e.g., air) entering the conveying area | The inner busing is damaged | Replace the inner bushing |
| The conveying medium overflows in the vent of the control valve | Replace the inner bushing |