FIELD: oil extracting industry.
SUBSTANCE: device has a tank for reagent with separator, dosing assembly with a valve, ring-shaped channel of variable length for dosed reagent outlet. Valve is made in form of rigidly connected valve, rod and disc. Disc is mounted in a rod with means for movement and is driven by a fluid flow, which fluid is sucked in by a pump. Disc is placed in a bushing of conical cross-section with means for smooth change of its lifting force and lifting of valve rod upwards during upward displacement of pump plunger.
EFFECT: higher effectiveness and reliability of operation.
2 cl, 1 dwg
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