FIELD: high-pressure and superhigh-pressure plunger pumps of hydraulic cutting complex.
SUBSTANCE: proposed valve has body with seat and bush secured in this body. Bush is provided with passages whose axes are located over circle at diameter of shut-off member. Shut-off member is made in form of tablet located in cylindrical cavity of bush. Diameter of cylindrical cavity is equal to diameter of tablet. Passages of bush are brought into communication with cylindrical cavity which is communicated with taper cavity of body through said passages and axial passage of bush. Sealing unit is located in wedge-shaped cavity formed between body, seat and bush. Sealing unit is provided with ring made from flexible material. Ring is engageable with end face of wedge-shaped sealing member. Wedge-shaped cavity is formed in seat by wedge-shaped circular bore, end surface of bush and inner surface of body.
EFFECT: enhanced operational reliability; simplified construction; reduced overall dimensions.
2 cl, 2 dwg
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