Abstract: A stop valve is disclosed which includes a means for venting fluid to the exterior of the valve housing if the valve is not properly adjusted, thereby providing a readily detectable visual indication that the valve needs to be readjusted or retightened. In another aspect, the invention includes a hygienic shutter assembly which seals the juncture between the shutter and its associated backing plate in a manner which eliminates crevices and sharp angles within which dirt and debris can accumulate.

Abstract: The invention concerns a procedure and a means for use in pumping and volumetry of foodstuff liquids. According to an embodiment of the invention, the foodstuff liquid is conducted through a suction pipe (14) or a suction tube into an air separator (16) and from the air separator (16) through a pumping device (23) further onwards. The air present among the foodstuff liquid is separated in the air separator (16) with the aid of vacuum in that a vacuum device (20) is activated when the pressure prevailing in the air separator (16) is higher than a preset value. The flow of the foodstuff liquid to the air separator (16) is controlled with a control device (15) disposed in the suction pipe (14), this control device being controlled in accordance with the level of the foodstuff liquid in the air separator (16).