Interface valve for vacuum sewer systems
First Claim
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1. An interface valve for a vacuum sewer system comprising:
- a valve casing;
a valve chamber in the casing;
a pneumatic connection, penetrating the valve casing;
an inflow connection to the valve casing for entrance of wastewater;
an outflow connection from the valve casing for exit of wastewater towards a vacuum source; and
an elastic sleeve element that is axially arranged within the valve chamber between the inflow connection and the outflow connection, the elastic sleeve element comprising a laterally extending seal section, the sleeve element being compressed in an axial direction relative to the valve chamber by an axial compression force that is generating a lateral tightening force on the seal section such that the seal section is closed for wastewater flow while the valve chamber is connected through the pneumatic connection to atmosphere, and that the seal section is opened for wastewater flow while the valve chamber is connected through the pneumatic connection to the vacuum source.
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Abstract
A pinch-type interface valve for vacuum sewer systems. The interface valve includes a valve chamber and therein a tube-like elastic element. The elastic element has a lateral seal section with seal strips. The seal strips are pressed against each other and tightened when the elastic element is axially compressed. The elastic element is expanded and the seal strips are pulled from each other when vacuum is transmitted into the valve chamber.
40 Citations
28 Claims
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1. An interface valve for a vacuum sewer system comprising:
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a valve casing;
a valve chamber in the casing;
a pneumatic connection, penetrating the valve casing;
an inflow connection to the valve casing for entrance of wastewater;
an outflow connection from the valve casing for exit of wastewater towards a vacuum source; and
an elastic sleeve element that is axially arranged within the valve chamber between the inflow connection and the outflow connection, the elastic sleeve element comprising a laterally extending seal section, the sleeve element being compressed in an axial direction relative to the valve chamber by an axial compression force that is generating a lateral tightening force on the seal section such that the seal section is closed for wastewater flow while the valve chamber is connected through the pneumatic connection to atmosphere, and that the seal section is opened for wastewater flow while the valve chamber is connected through the pneumatic connection to the vacuum source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification