| 摘要 |
The present invention provides a method and an installation for filtering a liquid using a membrane filter device. The technical sector of the invention is the field of manufacturing filter devices, in particular semipermeable membrane devices. In the invention, a pump (3, 4) for pressurizing a liquid has three pistons (24, 25, 26) connected to a common shaft (23) mounted to move in translation in three chambers (18a, 18b; 19a, 19b; 20a, 20b) that are in alignment; two of said pistons (24, 26) being identical and connected to the ends of the shaft (23), each separating one of the chambers (18, 20) into two cavities (18a, 18b, 20a, 20b).
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