THROTTLE Russian patent published in 2011 - IPC F28F9/22 F22B37/74 F16K47/06 

FIELD: power industry.

SUBSTANCE: throttle is installed in inlet section of heat exchange pipe with possibility of interaction with pressure grid attached by means of detachable connection to tube sheet. Throttle consists of composite parts: shank and shell enveloping it with possibility of interaction of the bottom of this shell with pressure grid. The latter has the possibility of being moved along axes of pipes. Shell tightly envelopes the throttle so that it is borne against the flange of the latter so that upper surface of shank and housing of shell form a cavity. This cavity is interconnected with inlet hole of shank and outlet coaxial hole of shell and pressure grid.

EFFECT: providing the required control of liquid flow along U-shaped tube bank of heat exchanger of nuclear power plant and convenient real time access at implementation of revision of internal surface of tubes and during preventive maintenance of the latter.

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