| 摘要 |
A changeover device (1) (fig. 1) connects two gas cylinders (B1,B11) in parallel and changes over automatically and without interruption from one cylinder (B1) to the other cylinder (B11) after the first cylinder (B1) is emptied, so that a constant gas flow to the consumer (V) is ensured. The aim of the invention is to device the changeover device (10) so that it changes over only upon the optimum emptying of the cylinder (B1). To achieve this the back pressure region of the pressure-reducer (64) provided in the outlet pipe (62) is connected back to the changeover device (10). In this way the changeover pressure is controlled as a function of the work pressure of the consumer (V) so that an optimum emptying of the cylinders (B1,B11) is obtained at all times. <IMAGE> |
