FIELD: engines and pumps.
SUBSTANCE: invention relates to oil-and-gas industry and can be used in operating oil wells, including directed and inclined ones. Proposed valve device comprises cylindrical housing with axial bore accommodating suction and discharge valves, each furnished with seat and ball. Rod is fitted right above the said seat and is linked with cup spring-loaded relative to the housing. Rod and wedge are arranged to interact with suction valve ball. There is lengthwise channel with bottom hole to receive the said wedge, arranged in the housing, right above the valve seat. Pushrod is rigidly coupled with aforesaid cup from above and inserted into the channel to effect lengthwise limited displacement. Wedge is arranged to interact with lateral hole upper edge during pushrod upward displacement.
EFFECT: higher reliability, expanded performances.
2 dwg
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