FIELD: food industry; safety device for valve attachment fitted in drain hole of barrel filled with drink under pressure, for instance, beer. SUBSTANCE: fixing member is made in the form of part with double bent, shelf 22 projecting outside part 23, arranged at an angle and inner projection 24. Shaft thrusts against trapezium recess in bottom plate. Lifting tube is tapered between lower portion of smaller diameter lifting tube and upper portion of larger diameter lifting tube arranged in housing. Length of taper portion from projection of fixing member is greater than normal length of lifting tube opening stroke. EFFECT: improved reliability of closing, facilitated disassembling of safety device. 13 cl, 21 dwg
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