(57) An automatic liquid supply system comprising one or more liquid storage vessels,
one or more self-priming liquid transport pumps, conduits connecting said storage
vessels via the pumps with one or more liquid delivery points, and means for controlling
the liquid current. The delivery conduit of the transport pump is divided into a conduit
8, comprising a buffer vessel 6 and leading to the liquid delivery points, and a conduit
8' including a pressure control means 7 the arrangement being such as to ensure the
uninterrupted flow of liquid to the delivery points when gas or vapour is temporarily
pumped.
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