| 摘要 |
The invention is directed to a packaging machine (1) with a fluid pump assembly (6) of the radial cylinder type, the assembly (6) comprising a plurality of at least three pumps (12). Each pump (12) has a piston (13) guided in a cylinder (14), as well as a high pressure port (24) and a low pressure port (25). A manifold (26) is provided connecting the high pressure ports (24) of a first group (G1) of first stage pumps (12a) so that the pumps (12a) of this first group are operatively connected in parallel, while at least one second stage pump (12b) is operatively connected to the first group (G1) of pumps in series. The invention is further directed to a method for generating a vacuum in a packaging machine (1) with a fluid pump assembly (6). |
