FIELD: machine building.
SUBSTANCE: valve comprises a rod assembly comprising a wall and a passage formed within mentioned stem assembly. Mentioned passage forms a first opening. Forms part of mentioned wall portion of erosion, which is subject to contact with particles, whereby the second opening is formed in the passage. Furthermore, the valve comprises a sensing device in fluid communication through a first opening to mentioned passage. Mentioned sensor device is adapted to transmit a signal indicating an increase in fluid flow through the passage.
EFFECT: wear reduction of stocks as a result of erosion.
20 cl, 5 dwg
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