Abstract: This stuffing box (46) defines a circulation passage (66) of a cable working line (28), a packer (70), and a back-pressure resistant valve (74). The passage (66) extends between an upstream end (62) of the stuffing box (46), intended to be connected to a well, and a downstream end (64). The back-pressure resistant valve (74) is arranged in the passage (66) to prevent, in case of break of the line (28), the back-pressure of a fluid from the upstream end (62) towards the downstream end (64). The or each packer (70) is situated between the upstream end (62) of the stuffing box (46) and the back-pressure resistant valve (74). No packer (70) is arranged between the back-pressure resistant valve (74) and the downstream end (64).

Abstract: The invention concerns a method and a device for processing a photographic film.The process comprises the following steps: a) circulating the film (2) in a series of processing baths (5, 6, 7, 8), each of the baths having a rinsing zone (53, 62, 73, 82) including one or more tanks; b) recovering and treating the waste water coming from all the rinsing zones in a single nanofiltration device (100), common to all the processing baths; and c) recycling the permeate (106) from the nanofiltration device (100) in each of the rinsing zones (43, 62, 73, 82) of each of the processing baths (5, 6, 7, 8).Application to the processing of photographic films.