| 摘要 |
A method for use in conjunction with a spraying apparatus, especially a fire extinguishing apparatus, said apparatus comprising a source of a medium, a pump means and means for passing at least a proportion of the medium to at least one nozzle (4). Some of the medium which is not passed to the nozzle is re-circulated back to the suction side of the pump means (3) when necessary and, at least when necessary, at least some of the medium being re-circulated is passed into a discharge pipe (15) before the pump means (3). The invention also relates to an apparatus. |
