What is the required action time of the water testing device at the end of the fire sprinkler system?

The pressure is not less than 0.05mpa, and the spray pump should start automatically within 30 seconds.

The nozzle at the most unfavorable point controlled by each alarm valve group should be equipped with a terminal water testing device, and other fire zones and floors should be equipped with water testing valves with a diameter of 25 mm

Terminal water testing device shall be composed of water testing valve, pressure gauge and water testing connector. The discharge coefficient of the outlet of the test joint shall be equal to the minimum discharge coefficient of the sprinkler in the same floor or fire zone. The effluent from the terminal water testing device should be discharged into the drainage pipeline in the form of orifice outflow, and the drainage riser should be provided with an extended top vent pipe with a diameter of not less than 75 mm

Extended data:

Precautions:

Use special test instruments or other means to input simulated fire signals to various detectors of the automatic fire alarm system, and the automatic fire alarm controller shall send out sound and light alarm signals and start the automatic sprinkler system.

Start the sprinkler or drain water from the terminal water testing device at a flow rate of 0.94 ~ 1.5L/s, and the water flow indicator, pressure switch, hydraulic alarm bell and fire pump should act in time and send corresponding signals.

Pipeline installation should have a slope. The water distribution branch pipe inclines to the main pipe with a slope of 4‰, and the main pipe inclines to the terminal outlet or the riser outlet with a slope of 2‰.

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