초록 ▼

A diaphragrm valve for removal of samples from a pipeline for water of predetermined microbiological purity has a body with a liquid-receiving inlet and an outlet which can be sealed from the inlet by the central portion of a substantially flat diaphragm. The outlet and that surface of the central p

A diaphragrm valve for removal of samples from a pipeline for water of predetermined microbiological purity has a body with a liquid-receiving inlet and an outlet which can be sealed from the inlet by the central portion of a substantially flat diaphragm. The outlet and that surface of the central portion of the diaphragm which overlies the intake of the outlet or which is adjacent to the intake of the outlet are sterilized with steam or with a liquid chemical which is admitted by a conduit at an acute angle to the direction of flow of samples through the outlet. Such sterilization takes place while the diaphragm seals the outlet and prior to removal of the first sample. The body of the valve can have a second outlet which is in continuous communication with the inlet. The liquid medium rinses and sterilizes the major part of the interior of the valve, irrespective of whether the inlet branches off a pipeline or is a part of the pipeline.

대표청구항 ▼

A valve for removing samples from a liquid stream, particularly for removing samples of water exhibiting a given microbiological purity, comprising a valve body defining a chamber and having an inlet for admission of liquid into said chamber and at least one outlet for evacuation of liquid samples i

A valve for removing samples from a liquid stream, particularly for removing samples of water exhibiting a given microbiological purity, comprising a valve body defining a chamber and having an inlet for admission of liquid into said chamber and at least one outlet for evacuation of liquid samples in a predetermined direction; a seat provided in said chamber; a valving element including a diaphragm having a portion movable to and from an operative position of engagement with said seat in which said diaphragm seals said inlet from said outlet; means for moving said movable portion of said diaphragm; a source of disinfecting agent; and means for admitting such agent from said source into said outlet at an acute angle to said direction so that the agent can enter a portion of said chamber and to contact another portion of said diaphragm on its way from said source into said chamber portion and thence into said outlet in the operative position of said movable portion of said diaphragm to sterilize said another diaphragm portion and said chamber portion prior to the removal of samples; said admitting means opening directly into said outlet.