Backflow valves with nominal diameter DN 10-1000 mm, nominal pressure PN 1,6-40,0 MPa, lifting, rotary, axisymmetric. They are intended for installation as devices for prevention of reverse flow of working medium at hazardous production facilities and installed on process pipelines of oil and gas processing, oil production, petrochemical, gas industries, hydrocarbon raw materials processing and petrochemical industry.
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