FIELD: machine building.
SUBSTANCE: in check valve containing a body, shutoff element and seat, the compressed spring is located across stroke of the shutoff element, and the shutoff element pressing to the seat is ensured by the compressed spring deflection.
EFFECT: invention ensures increased energy efficiency of the submersible pump equipment.
4 dwg
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Authors
Dates
2015-08-10—Published
2014-06-30—Filed