In the wet alarm valve usually kept under working condition, alarm test ball valve state usually is closed or open?Because the alarm performance test on the pressure switch and hydraulic alarm, can be tested by open test ball valve, the bar working condition, the valve is closed or open? If so, if there is a police situation, if the police? If it does, it doesn't always call the police Seek expert advice.
Should be normally closed, the test valve is only the experimental pressure switch and hydraulic alarm, water from the valve directly into the alarm line, the wet alarm valve does not move, but you open, it usually has been ringing
Connect the valve in the hydraulic alarm above is normally open, water valve is normally closed, when the test fire, put out waterproof valve hydraulic alarm alarm, pressure switch module, spray pump inside the pump starts automatically. The end of the spray can be drained out or drained, and the pump can also be started
The water control valve is to control the sprinkler system water supply valve opening and closing, the installation is not only to ensure the operation is convenient, but also marked the opening and closing position, its open position is determined when the sprinkler system in fire water can flow, so as to meet the requirements of the key. In system debugging after passing the system in a quasi working state, water control valve should be fully open in a normally open state, to prevent accidents and man-made shut down control valve, water control valves must be set reliable locking device to lock in the open position; at the same time also should set the signal facilities and fire control center or guard duty room connected, once the water control valve is closed should be promptly issued a warning signal, the duty should be timely check the reason and make it in the normal state. This can be seen in the sprinkler system superior acceptance specification, which is clearly explained in the provision.
