What is the installation height of water mist nozzles?

The effectiveness of the water mist nozzle is not only related to the nozzle itself, but also has a lot to do with the installation of the nozzle. So what is the installation height of the water mist nozzle? The installation height of the water mist nozzle is related to the type of nozzle, application location, fire extinguishing requirements and other factors. Generally speaking, the installation height of water mist nozzles is about 3-7 meters. The specific height depends on the use place and working environment. The following are the installation height and installation requirements of water mist nozzles:

1. Installation height of water mist nozzle

The installation height of water mist nozzles varies depending on the place of use, generally around 3-7 meters. Water mist nozzles are widely used in libraries, archives, mechanical equipment rooms, electrical equipment rooms, high and low voltage distribution rooms, power transformer rooms, outdoor transformers, computer and communication rooms, underground tunnels and other places. The following are the height requirements for application in different places:

1. The installation height of oil-immersed transformer rooms, turbine rooms and other places should be greater than or equal to 7.5 meters;

2. Hydraulic stations, diesel generator rooms, fuel-fired boiler rooms and other places must be greater than or equal to 5 meters;

3. In densely populated places such as cultural relics warehouses, libraries, databases, archives, etc., the installation height should be between 3-5 meters.

2. Installation requirements for water mist nozzles

1. The installation arrangement of the nozzles of the high-pressure water mist open system should be able to ensure that the fine water mist nozzles spray evenly and cover the protected area, and should comply with the following regulations:

a. During construction, the distance between the installation of high-pressure water mist nozzles and the wall should not be greater than 1/2 of the maximum arrangement spacing of nozzles;

b. The distance between the open high-pressure water mist nozzle and other obstructions should be confirmed to ensure that the obstruction does not affect the normal spraying of fine water mist by the nozzle; when it cannot be avoided, compensatory measures should be taken;

c. For cable tunnels or mezzanines during construction, the nozzles should be arranged at the upper part of the cable tunnel or mezzanine, and the fine water mist should be able to cover the entire cable or cable tray.

2. For open systems that use local application, the nozzle arrangement should be able to confirm that the fine water mist envelops or covers the protected object. The distance between the fine water mist nozzle and the protected object should not be less than 0.5m. When used to protect oil-immersed transformers, the layout of the sprinkler heads should comply with the following construction regulations:

a. When the height of the transformer exceeds 4m, the sprinkler heads should be arranged in layers;

b. When the distance between the cooler and the transformer body exceeds 0.7m, a sprinkler head should be installed in the gap;

c. The nozzle should not be directly aimed at the high-voltage inlet casing;

d. When an oil collection pit is set up under the transformer, the installation arrangement of the fine water mist nozzles should be such that the fine water mist covers the oil collection pit.

3. The nozzle arrangement of the high-pressure water mist closed system should ensure that the fine water mist is sprayed evenly and covers the protected area, and should comply with the following regulations:

a. The distance between the sprinkler head and the wall should not be greater than 1/2 of the maximum layout spacing of the sprinkler head;

b. The distance between the sprinkler head and other obstructions should be confirmed to ensure that the obstruction does not affect the normal spraying of fine water mist by the sprinkler head. When this cannot be avoided, compensatory measures should be taken;

c. The distance between the temperature-sensing component of the nozzle and the ceiling or the bottom of the beam should not be less than 75mm and should not be greater than 150mm. When a suspended ceiling is installed in the venue, the sprinkler head can be placed close to the suspended ceiling.

3. Installation location of water mist nozzle

Water mist nozzles have an applicable scope and are generally suitable for combustible solid fires, combustible liquid fires, electrical fires, etc. However, they are not suitable for deep fires of combustible solids, fires of active metals and their compounds that can react violently with water or produce a large amount of harmful substances, and combustible gas fires. Therefore, you need to pay attention during installation.

1. Archives, libraries, hospitals, large shopping malls, high-rise buildings and other places

2. Control center, telecommunications equipment room and high and low voltage distribution room

3. Various large-space factories and warehouses

4. Subways, railway locomotives, various tunnels, etc.

5. Car spray paint booth

6. Cable tunnel, cable mezzanine

7. Internal combustion engine, generator set, hydraulic system, heat treatment workshop

8. Military weapons and equipment, warehouses

9. Petrochemical, coal chemical and other industries

10. Buses and large buses

11. Marine use

12. Kitchen fire

Water mist nozzles are an important component of the water mist fire extinguishing system. The large spray angle and the spray pattern of micro nozzles expand the installation distance of the nozzles and reduce the number of nozzles installed in the building. Therefore, different types of water mist nozzles are installed in different ways in different places. Only correct installation can the fire extinguishing effect of water mist nozzles be exerted.