FIELD: equipment for ballast tanks of submersible transport facilities.
SUBSTANCE: proposed fitting has body with cover and rod connected with shut-off member, pneumatic drive in form of body with cover, working medium supply unit and hollow plunger. Mounted in body around rod is spring whose lower end is secured on bottom of body and upper end is secured on head of sleeve which is engageable with signaling unit. Body may be provided with base having hole closed by shut-off member and engageable with cover of pneumatic drive; this cover has profiled cylindrical hollow part which is coaxial relative to body; plunger engageable with rod is mounted in this part. Shut-off member may be made in form of plate secured on rod for closing the hole in coaming secured hull.
EFFECT: enhanced reliability; improved service characteristics.
10 cl, 5 dwg
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