| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: invention refers to armature construction and is aimed for exploration and repair of oil and gas wells (acid treatment, well fracturing, masking out, etc.) working under hard conditions (aggressive medium, high concentration of solid particles, high pressure) as valve units of plunger pump plants for well servicing. The valve unit includes valve with ring channel for the sealing and cone working surface, valve seat with cone working surface made in the head of the seat and ring sealing. The square of contact between working surface of the seat and ring sealing amounts to 65-68% of the total square of contact surface. The valve is made of steel alloy including chrome, contents from 1.3 to 1.7 mass % and nickel, contents from 3.9 to 4.4 mass %. The seat is made of steel alloy including chrome, contents from 1.2 to 1.7 mass % and nickel, contents from 3.15 to 3.65 mass %. Ring sealing is made of elastomer material. ^ EFFECT: invention is aimed at increasing valve unit working resource. ^ 5 cl, 1 dwg |
