FIELD: production of fittings.
SUBSTANCE: group of inventions relates to hydraulic valves. Device for use with hydraulic valves contains: electric flow regulator containing drive rod; first piston. First hole is formed in first piston first surface. At that, first hole is made with possibility to receive electric flow regulator drive rod and includes first shoulder with possibility to interact with driving rod first flange part. Second piston, connected with possibility of movement relative to first piston. Hydraulic chamber is located between first and second pistons with possibility to receive control medium, which functionally connects first and second pistons, when control medium is provided in hydraulic chamber. At that, first piston is functionally disconnected from second piston, when at least part of control medium is discharging from hydraulic chamber.
EFFECT: group of inventions is aimed at improvement of accuracy of medium flow control through valve.
16 cl, 6 dwg
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