FIELD: construction.
SUBSTANCE: invention relates to pipe fittings and can be used in many industries. Disclosed is a supply indicator, which includes housing 1 with inlet and outlet tangential channels 2 interconnected with chamber 3, with installed inside it turntable 4 or indicator blade. Transparent elements 6 are installed in adjoining to chamber 3 opposite bores 5 of casing 1. They are sealed on side surface by elastic seals 7, bounded by plastic tread elements 8, 9, inner 8 of which are supported by their ends by benches 5 bores, and external 9 - by their ends on support washers 10, conjugated with wavy springs 11. Transparent elements 6 are fixed against loss by locking elements 12 located in grooves 13 of housing 1.
EFFECT: technical result is improved operational characteristics, simplified design and increased reliability.
1 cl, 2 dwg
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