FIELD: fire protection engineering. SUBSTANCE: device has supplying and feeding pipelines, control units having shut-off units, gate valves, valves and throttle valves. Newly introduced warning feed maintenance pipeline has flow rate relay and check valve. The flow rate relay is connected to the feeding pipeline and the check valve is connected to hydropneumatic vessel through a valve. The warning feed maintenance pipeline is separated from the supplying and feeding pipelines. EFFECT: enhanced effectiveness in fighting fire. 1 dwg
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