FIELD: gas industry.
SUBSTANCE: invention relates to equipment used for transportation and storage of fluids, preferably natural gas. Safety valve unit comprises two safety valves, high-pressure line, 4-way valve, 3-way valve and through valve. First output of 4-way valve is connected to air cylinder of switching device of first safety valve. Second output of 4-way valve is connected to air cylinder of switching device of second safety valve. Third output of 4-way valve is configured to control gas removal from system. Input of 4-way valve is configured for connecting an external source of control gas line via reduction gear. First output of 3-way valve is connected to flow valve to control gas removal from system. Second and third outputs are connected to shifters of switching device of high pressure connected with safety valves.
EFFECT: simplified design and easy maintenance.
7 cl, 1 dwg
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