FIELD: machine building.
SUBSTANCE: present invention relates to pipeline fittings with demountable internal actuators. An internal valve comprises a casing, including the valve inlet and outlet and a valve seat set between the valve inlet and outlet, a flow control unit which is coupled with the casing in terms of operation, the said control unit travels between the first position when it is pressed to the valve seat to limit the flow of fluid medium through the valve and the second position when there is a gap between the flow control unit and the valve seat allowing for the passage of the fluid medium flow through the valve, and an actuator comprising a housing set inside the casing between the valve inlet and outlet and responding to the fluid medium pressure thus making the flow control unit to move between the first and the second positions.
EFFECT: improved design.
20 cl, 6 dwg
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