| 摘要 |
The invention relates to a backflow preventer ( 1 ) integrateable into a gas or liquid pipeline ( 2 ). The inventive backflow preventer consists of a closing body ( 3 ) which is embodied in the form of a hollow body which is open on a drainage side thereof and defines a passage channel ( 5 ) between itself and the central counterpart ( 4 ) opposite thereto. Said closing body ( 3 ) is displaceable by a flow medium flowing through the passage channel ( 5 ) in a flow direction (Pf 1 ) from a sealing contact thereof with said counter part ( 4 ) of the closing body to the open position thereof against the opposing force of elasticity and /or stability thereof. Said backflow preventer ( 1 ) is easily producible even with a small number of components and is characterised by a high flow and low pressure loss.
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