The backpressure valve is intended for restart-up of excessive pressure from annular space. It Vvarivatsya in crossing of oil and gas lines at installation of fittings to the naskvazhena. The valve is washed by a stream of the extracted liquid that prevents freezing of the valve at low temperatures. The design of the valve allows to make adjustment on necessary pressure difference (to 0,3 MPas) without dismantling in an operating mode.
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Backpressure sharovy valve nonfreezing 461.100.870sb Du-100 Ru40
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