FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to oil industry and may be used in oil production, well flushing-out and development. Proposed valve comprises body, seat with axial channel accommodating seal cup fitted therein and bush with radial bore pressing said cup to seat to receive push rod with axial spring interacting with shutoff ball to press the latter against push rod face cup at its top. Push rod top face features disc shape with diameter approximating to bush ID to allow centering said rod in its axial displacement by bush walls. Bush bottom has nut with holes along its edges and axial hole to center push rod.
EFFECT: higher reliability, lower labor input.
1 dwg
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