| 摘要 |
A pinch valve assembly for use in fluidic applications having an inlet (2) and an outlet (3) between which a flexible conduit (1) is arranged, a base plate (4,5) firmly attached to a housing (16) maintaining in its upper part an electromagnet (17). The valve assembly further comprises a pinch element assembly (8) comprising in its lower external surface a knife (14), the pinch element assembly (8) being axially moveable around the body of the electromagnet (17) between a rest position in which the knife (14) pinches the flexible conduit (1) when the electromagnet (17) is not energized and an open position in which the knife releases the flexible conduit when the electromagnet is energized and in that it further comprises elastic means (9,20) urging the pinch element assembly (8) against the base plate (4,5). Energization of the electromagnet (17) is performed in two successive phases, a first phase with a high level of energy during a short time and a second phase with an energy ten times less that the energy provided in the first phase to maintain the valve open. |
