Wet System Alarm Valve

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Installation requirements

     The installation of alarm valve groups should be carried out after the pressure test and flushing of the water supply network are qualified. When installing, the water source control valve and alarm valve should be installed first, and then the auxiliary pipeline of the alarm valve should be connected. The connection between the water source control valve, alarm valve, and the water distribution main pipe should ensure consistent water flow direction. The installation position of the alarm valve group should meet the design requirements; When there are no design requirements, the alarm valve group should be installed in a prominent position that is easy to operate, and the height from the indoor ground should be 1.2m; The distance between both sides and the wall should not be less than 0.5m; The distance between the front and the wall should not be less than 1.2m; The distance between the protruding parts of the alarm valve group should not be less than 0.5m. The indoor ground where the alarm valve group is installed should have drainage facilities, and the drainage capacity should meet the requirements of alarm valve debugging, acceptance, and the use of water testing valves to vent the system pipeline.

1. The installation of alarm valve group accessories should meet the following requirements:

1) The pressure gauge should be installed on the alarm valve in a position that is easy to observe.

2) Drainage pipes and test valves should be installed in convenient positions for operation.

3) The installation of water source control valves should be easy to operate, and there should be obvious opening and closing signs and reliable locking facilities.

2. The installation of wet alarm valve groups should meet the following requirements:

1) The pipeline before and after the alarm valve should be filled with water smoothly; When the pressure fluctuates, the hydraulic alarm bell should not give false alarms.

Inspection method: Observe and open the valve to discharge water at a flow rate less than one nozzle.

2) The filter on the alarm water flow path should be installed in front of the delay device and in a position that is convenient for slag removal operation.

3. The installation of the dry alarm valve group should meet the following requirements:

1) It should be installed in a place where freezing does not occur.

2) After installation, clean water with a height of 50mm~100mm should be injected into the alarm valve chamber.

3) The interface of the inflation connection pipe should be above the filling water level of the alarm valve chamber, and the diameter of the inflation connection pipe should not be less than 15mm; Check valves and globe valves should be installed on the inflation connection pipe.

4) The installation of air source equipment should comply with design requirements and current national standards.

5) The safety exhaust valve should be installed between the gas source and the alarm valve, and should be close to the alarm valve.

6) The accelerator should be installed near the alarm valve and measures should be taken to prevent water from entering the accelerator.

7) The low-pressure warning device should be installed on one side of the water distribution main.

8) Pressure gauges should be installed in the following areas:

The water filling side and inflation side of the alarm valve.

On the air pump and storage tank of the air compressor.

On the accelerator.

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