| 摘要 |
The device has one valve body that can be set at a constant minimum cross-section and another valve body that is not activated until the pressure in a supply connection becomes too high. The valve bodies are accommodated in separate and parallel-streamed valve housings. Since the design allows free selection of the cross-section in the valve housings, extremely wide fluctuations in the concentration of cream can be mastered in accordance with controls technology by means of the second valve body.
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